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Professor/in em./i.R., Theoretische Physik
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SoSe 2022
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Die folgenden Publikationen sind in der Online-Universitätsbibliographie der Universität Duisburg-Essen verzeichnet. Weitere Informationen finden Sie gegebenenfalls auch auf den persönlichen Webseiten der Person.
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Why boundary conditions do not generally determine the universality class for boundary critical behaviorIn: The European Physical Journal B: Condensed Matter and Complex Systems , Jg. 93 2020, Nr. 10, 195DOI, Online Volltext (Open Access)
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Fluctuation-induced forces in confined ideal and imperfect Bose gasesIn: Physical Review E , Jg. 95 2017, Nr. 6, 062112DOI, Online Volltext (Open Access)
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The three-dimensional O(n) ϕ 4 model on a strip with free boundary conditions : Exact results for a nontrivial dimensional crossover in the limit n→∞In: Theoretical and Mathematical Physics , Jg. 190 2017, Nr. 2, S. 279 – 294
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Comment on "Nonlocal quartic interactions and universality classes in perovskite manganites"In: Physical Review E , Jg. 94 2016, Nr. 3, 036101DOI, Online Volltext (Open Access)
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Comment on "casimir force in the O(n→ ∞) model with free boundary conditions"In: Physical Review E: Statistical, nonlinear, and soft matter physics , Jg. 91 2015, Nr. 2, 026101DOI, Online Volltext (Open Access)
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Inverse scattering theory and trace formulae for one-dimensional Schrödinger problems with singular potentialsIn: Journal of Physics A: Mathematical and Theoretical , Jg. 48 2015, Nr. 37, 375201DOI, Online Volltext (Open Access)
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Inverse-scattering-theory approach to the exact n→∞ solutions of O(n) ϕ4 models on films and semi-infinite systems bounded by free surfacesIn: Physical Review E: Statistical, nonlinear, and soft matter physics , Jg. 91 2015, Nr. 6, 062114DOI, Online Volltext (Open Access)
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Large-n approach to thermodynamic Casimir effects in slabs with free surfacesIn: Physical Review E: Statistical, nonlinear, and soft matter physics , Jg. 89 2014, Nr. 6, 062123DOI, Online Volltext (Open Access)
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The O(n) $\phi^4$ model with free surfaces in the large-n limit : Some exact results for boundary critical behaviour, fluctuation-induced forces and distant-wall correctionsIn: Journal of Physics A: Mathematical and Theoretical , Jg. 47 2014, Nr. 14, 145004DOI, Online Volltext (Open Access)
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Exact thermodynamic Casimir forces for an interacting three-dimensional model system in film geometry with free surfacesIn: EPL (Europhysics Letters) , Jg. 100 2012, Nr. 1, 10004DOI, Online Volltext (Open Access)
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Erratum to "On conjectured local generalizations of anisotropic scale invariance and their implications"In: Nuclear Physics B , Jg. 853 2011, Nr. 1, S. 210 – 211DOI (Open Access)
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Erratum: Fluctuation-induced forces in strongly anisotropic critical systemsIn: Journal of Statistical Mechanics: Theory and Experiment , Jg. 2011 2011, Nr. 5, E05001DOI (Open Access)
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On conjectured local generalizations of anisotropic scale invariance and their implicationsIn: Nuclear Physics B , Jg. 843 2011, Nr. 1, S. 255 – 301DOI, Online Volltext (Open Access)
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The critical Casimir effect in films for generic non-symmetry-breaking boundary conditionsIn: New Journal of Physics (NJP) , Jg. 13 2011, Nr. 12, 123025DOI, Online Volltext (Open Access)
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Fluctuation-induced forces in strongly anisotropic critical systemsIn: Journal of Statistical Mechanics: Theory and Experiment , Jg. 2010 2010, Nr. 11, P11020
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Critical Casimir amplitudes for n-component $\phi^4$ models with $O(n)$-symmetry breaking quadratic boundary termsIn: Nuclear Physics B , Jg. 822 2009, Nr. 3, S. 517 – 542DOI, Online Volltext (Open Access)
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Dynamic critical behavior of model a in films : Zero-mode boundary conditions and expansion near four dimensionsIn: Physical Review B: Condensed matter and materials physics , Jg. 79 2009, Nr. 10, 104301DOI, Online Volltext (Open Access)
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Compatibility of 1/n and ε expansions for critical exponents at m-axial Lifshitz pointsIn: Journal of Physics A: Mathematical and Theoretical , Jg. 41 2008, Nr. 13, 135003
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Crossover from attractive to repulsive Casimir forces and vice versaIn: Physical Review Letters , Jg. 101 2008, Nr. 10, 100601DOI, Online Volltext (Open Access)
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Thermodynamic Casimir effects involving interacting field theories with zero modesIn: Physical Review B: Condensed matter and materials physics , Jg. 77 2008, Nr. 11, 115409
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Boundary critical behaviour at m-axial Lifshitz points of semi-infinite systems with a surface plane perpendicular to a modulation axisIn: Journal of Physics A: Mathematical and Theoretical , Jg. 39 2006, Nr. 25, S. 7927 – 7942DOI (Open Access)
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Excess free energy and Casimir forces in systems with long-range interactions of van der Waals type : General considerations and exact spherical-model resultsIn: Physical Review E: Statistical, nonlinear, and soft matter physics , Jg. 73 2006, Nr. 1, 016131DOI (Open Access)
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Fluctuation-induced forces in periodic slabs : Breakdown of ε expansion at the bulk critical point and revised field theoryIn: EPL (Europhysics Letters) , Jg. 75 2006, Nr. 2, S. 241 – 247DOI (Open Access)
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Bulk and boundary critical behavior at Lifshitz points
22nd International Conference on Statistical Physics (STATPHYS 22) of the International Union of Pure and Applied Physics (IUPAP), 4--9 July 2004, Bangalore, India,In: Pramana: Journal of Physics , Jg. 64 2005, Nr. 5, S. 803 – 816DOI (Open Access) -
Large-n expansion for m-axial Lifshitz pointsIn: Journal of Physics: Condensed Matter , Jg. 17 2005, Nr. 20, S. 1947 – S1972DOI (Open Access)
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Boundary critical behaviour at m-axial Lifshitz points : The special transition for the case of a surface plane parallel to the modulation axesIn: Journal of Physics A: Mathematical and Theoretical , Jg. 37 2004, Nr. 36, S. 8575 – 8594DOI (Open Access)
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Boundary critical behavior at m-axial Lifshitz points for a boundary plane parallel to the modulation axesIn: Physical Review B: Condensed matter and materials physics , Jg. 68 2003, Nr. 22, 224428
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Comment on “Renormalization-group picture of the Lifshitz critical behavior”In: Physical Review B: Condensed matter and materials physics , Jg. 68 2003, Nr. 6, 066401DOI (Open Access)
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Erratum: Surface critical behaviour at m-axial Lifshitz points: Continuum models, boundary conditions and two-loop renormalization group resultsIn: Journal of Physics A: Mathematical and Theoretical , Jg. 36 2003, Nr. 46, S. 11711DOI (Open Access)
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Relevance of space anisotropy in the critical behavior of m-axial Lifshitz pointsIn: Physical Review B: Condensed matter and materials physics , Jg. 68 2003, Nr. 22, 224415DOI (Open Access)
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Surface critical behaviour at m-axial Lifshitz points : Continuum models, boundary conditions and two-loop renormalization group resultsIn: Journal of Physics A: Mathematical and Theoretical , Jg. 36 2003, Nr. 16, S. L243 – L248
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Critical behavior at m-axial Lifshitz pointsIn: Acta Physica Slovaca , Jg. 52 2002, Nr. 4, S. 271 – 283
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Critical, crossover and correction-to-scaling exponents for isotropic Lifshitz points to order (8 - d)²In: Journal of Physics A: Mathematical and Theoretical , Jg. 35 2002, Nr. 30, S. 6249 – 6259DOI (Open Access)
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Dynamic surface critical behavior of isotropic Heisenberg ferromagnets : Boundary conditions, renormalized field theory, and computer simulation resultsIn: Physical Review B: Condensed matter and materials physics , Jg. 66 2002, Nr. 2, S. 244081 – 2440819DOI, Online Volltext (Open Access)
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Bulk singularities at critical end points : A field-theory analysisIn: The European Physical Journal B: Condensed Matter and Complex Systems , Jg. 21 2001, Nr. 4, S. 567 – 587DOI (Open Access)
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Comment on “Renormalization-group calculation of the dependence on gravity of the surface tension and bending rigidity of a fluid interface”In: Physical Review Letters , Jg. 87 2001, Nr. 20, 209601DOI (Open Access)
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Dynamic surface critical behavior of isotropic Heisenberg ferromagnetsIn: Physica A: Statistical Mechanics and its Applications , Jg. 297 2001, Nr. 1-2, S. 64 – 72DOI (Open Access)
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Liftshitz-point critical behaviour to O(∈²)In: Journal of Physics A: Mathematical and Theoretical , Jg. 34 2001, Nr. 42, S. 9101 – 9105DOI (Open Access)
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Two-loop renormalization-group analysis of critical behavior at m-axial Lifshitz pointsIn: Nuclear Physics B , Jg. 612 2001, Nr. 3, S. 340 – 372DOI (Open Access)
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Critical behavior at m-axial Lifshitz points : Field-theory analysis and ε-expansion resultsIn: Physical Review B: Condensed matter and materials physics , Jg. 62 2000, Nr. 18, S. 12338 – 12349DOI (Open Access)
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Field-theoretical analysis of singularities at critical end pointsIn: Physica A: Statistical Mechanics and its Applications , Jg. 281 2000, Nr. 1, S. 268 – 275DOI (Open Access)
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Wenn der Rand beliebig dick wird : Kritische Phänomene an GrenzflächenIn: Essener Unikate: Berichte aus Forschung und Lehre 1999, Nr. 11 : Naturwissenschaft Physik – Unordnung und Selbstähnlichkeit, S. 80 – 97Online Volltext (Open Access)
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Critical behaviour of three-dimensional Ising ferromagnets at imperfect surfaces : Bounds on the surface critical exponent β₁In: The European Physical Journal B: Condensed Matter and Complex Systems , Jg. 1 1998, Nr. 4, S. 401 – 404DOI (Open Access)
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Massive field-theory approach to surface critical behavior in three-dimensional systemsIn: Nuclear Physics B , Jg. 528 1998, Nr. 3, S. 595 – 647DOI (Open Access)
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Surface critical behavior of BCC binary alloysIn: Physical Review B: Condensed matter and materials physics , Jg. 57 1998, Nr. 3, S. 1908 – 1921
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Wetting phenomena in BCC binary alloysIn: International Journal of Thermophysics , Jg. 19 1998, Nr. 4, S. 1219 – 1228
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Surface critical behavior of binary alloys and antiferromagnets : Dependence of the universality class on surface orientationIn: Physical Review Letters , Jg. 78 1997, Nr. 6, S. 1090 – 1093DOI (Open Access)
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The theory of boundary critical phenomenaIn: International Journal of Modern Physics B (IJMPB): Condensed Matter Physics , Jg. 11 1997, Nr. 30, S. 3503 – 3523
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Dynamical relaxation and universal short-time behavior in finite systems : The renormalization-group approachIn: Nuclear Physics B , Jg. 464 1996, Nr. 3, S. 512 – 539DOI (Open Access)
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Dynamic surface critical behavior of systems with conserved bulk order parameter : Detailed RG analysis of the semi-infinite extensions of model B with and without nonconservative surface termsIn: Zeitschrift für Physik B Condensed Matter , Jg. 97 1995, Nr. 2, S. 251 – 267DOI (Open Access)
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Long-time traces of the initial condition in relaxation phenomena near criticalityIn: Physical Review E: Statistical, nonlinear, and soft matter physics , Jg. 51 1995, Nr. 6, S. 5392 – 5395
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Critical adsorption of fluids and the equivalence of extraordinary to normal surface transitionsIn: Berichte der Bunsengesellschaft für physikalische Chemie , Jg. 98 1994, Nr. 3, S. 466 – 471
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Ordinary, extraordinary, and normal surface transitions : Extraordinary-normal equivalence and simple explanation of |T-Tc|2-α singularitiesIn: Physical Review B: Condensed matter and materials physics , Jg. 50 1994, Nr. 6, S. 3894 – 3898
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Surface critical behavior in fixed dimensions d<4 : Nonanalyticity of critical surface enhancement and massive field theory approachIn: Physical Review Letters , Jg. 73 1994, Nr. 25, S. 3431 – 3434
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Universal order-parameter profiles for critical adsorption and the extraordinary transition : A comparison of ϵ expansion and Monte Carlo resultsIn: Berichte der Bunsengesellschaft für physikalische Chemie , Jg. 98 1994, Nr. 3, S. 486 – 490
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Universality classes for the dynamic surface critical behavior of systems with relaxational dynamicsIn: Physical Review B: Condensed matter and materials physics , Jg. 49 1994, Nr. 4, S. 2846 – 2860
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Critical behavior at supercritical surface enhancement : Temperature singularity of surface magnetization and order-parameter profile to one-loop orderIn: Physical Review B: Condensed matter and materials physics , Jg. 47 1993, Nr. 10, S. 5841 – 5848
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Dynamical relaxation and universal short-time behavior of finite systemsIn: Journal of Statistical Physics , Jg. 73 1993, Nr. 1-2, S. 1 – 20
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Erratum: Critical behavior at the extraordinary transition : Temperature singularity of surface magnetization and order-parameter profile to one-loop orderIn: Physical Review B: Condensed matter and materials physics , Jg. 48 1993, Nr. 9, S. 6740
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Boundary conditions for the field theory of dynamic critical behavior in semi-infinite systems with conserved order parameterIn: Physical Review A: Atomic, Molecular, and Optical Physics , Jg. 45 1992, Nr. 10, S. 7145 – 7155
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Cubic Surface Fields and the Field Theory of Critical AdsorptionIn: EPL (Europhysics Letters) , Jg. 15 1991, Nr. 6, S. 693
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Surface critical behavior in the presence of linear or cubic weak surface fieldsIn: Physical Review B: Condensed matter and materials physics , Jg. 44 1991, Nr. 13, S. 6642 – 6662
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Critical behavior at dirty surfaces : II. RG analysis of a bulk tricritical system with quenched surface-enhancement disorderIn: Zeitschrift für Physik B Condensed Matter , Jg. 79 1990, Nr. 1, S. 79 – 90
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Critical behavior at dirty surfaces : I. General considerationsIn: Zeitschrift für Physik B Condensed Matter , Jg. 79 1990, Nr. 1, S. 69 – 78
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Cubic surface fields and the field theory of critical adsorptionIn: EPL (Europhysics Letters) , Jg. 12 1990, Nr. 7, S. 635 – 640
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Semi-infinite Potts model and percolation at surfacesIn: Zeitschrift für Physik B Condensed Matter , Jg. 74 1989, Nr. 3, S. 395 – 401
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Universal shape ratios for open and closed random walks : Exact results for all dIn: Journal of Physics A: Mathematical and General , Jg. 22 1989, Nr. 3, 005
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Surface critical behavior of tricritical systemsIn: Physical Review B: Condensed matter and materials physics , Jg. 37 1988, Nr. 10, S. 5257 – 5273
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Finite size effects in critical dynamics and the renormalization groupIn: Zeitschrift für Physik B Condensed Matter , Jg. 66 1987, Nr. 2, S. 211 – 218
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Walks, polymers, and other tricritical systems in the presence of walls or surfacesIn: EPL (Europhysics Letters) , Jg. 4 1987, Nr. 6, S. 709 – 714
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Critical behavior of the nonlinear σ model with a free surface : The ‘‘ordinary’’ transition in 2+ε dimensionsIn: Physical Review Letters , Jg. 56 1986, Nr. 26, S. 2834 – 2837
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Universal relations among critical amplitudes of surface quantitiesIn: Physical Review B: Condensed matter and materials physics , Jg. 31 1985, Nr. 9, S. 5841 – 5853
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Effects of surface exchange anisotropies on magnetic critical and multicritical behavior at surfacesIn: Physical Review B: Condensed matter and materials physics , Jg. 30 1984, Nr. 1, S. 300 – 314
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Multicritical behaviour at surfacesIn: Zeitschrift für Physik B Condensed Matter , Jg. 50 1983, Nr. 2, S. 117 – 129
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The effects of surfaces on dynamic critical behaviorIn: Zeitschrift für Physik B Condensed Matter , Jg. 51 1983, Nr. 4, S. 343 – 354
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Universality, irrelevant surface operators, and corrections to scaling in systems with free surfaces and defect planesIn: Physical Review B: Condensed matter and materials physics , Jg. 27 1983, Nr. 5, S. 2937 – 2954
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Critical behavior of semi-infinite magnets (invited)In: Journal of Applied Physics , Jg. 53 1982, Nr. 11, S. 7914 – 7919
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Irrelevance of surface anisotropies for critical behavior near free surfaceIn: Physical Review Letters , Jg. 48 1982, Nr. 25, S. 1767
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Critical behaviour of the energy density in semi-infinite systemsIn: Zeitschrift für Physik B Condensed Matter , Jg. 43 1981, Nr. 4, S. 315 – 320
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Field-theoretical approach to multicritical behavior near free surfacesIn: Physical Review B: Condensed matter and materials physics , Jg. 24 1981, Nr. 5, S. 2878 – 2880
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Field-theoretical approach to static critical phenomena in semi-infinite systemsIn: Zeitschrift für Physik B Condensed Matter , Jg. 42 1981, Nr. 1, S. 65 – 86
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Derivation of the nonlinear σ-model from the O(n) Ginsburg-Landau-Wilson model in the low-temperature limitIn: Physics Letters A , Jg. 75 1980, Nr. 5, S. 375 – 378
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Scaling laws and surface exponents from renormalization group equationsIn: Physics Letters A , Jg. 80 1980, Nr. 5-6, S. 408 – 412
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Self-consistent cluster theory for systems with off-diagonal disorderIn: Physical Review B: Condensed matter and materials physics , Jg. 21 1980, Nr. 10, S. 4230 – 4246
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The interface in a Ginsburg-Landau-Wilson model : Derivation of the drumhead model in the low-temperature limitIn: Zeitschrift für Physik B Condensed Matter , Jg. 36 1980, Nr. 4, S. 329 – 333
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Effective-medium theory for goldstone systems with off-diagonal disorderIn: Solid State Communications , Jg. 32 1979, Nr. 7, S. 511 – 513
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Pseudofermion approach to binary disordered systems : II. Goldstone systems with off-diagonal disorderIn: Physical Review B: Condensed matter and materials physics , Jg. 19 1979, Nr. 2, S. 596 – 608
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Pseudofermion approach to binary disordered systems : I. Effective-medium theories and the augmented-space methodIn: Physical Review B: Condensed matter and materials physics , Jg. 19 1979, Nr. 2, S. 587 – 595
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Traveling pseudofermion approximation for phonon frequency spectra of binary mixed crystalsIn: Physical Review B: Condensed matter and materials physics , Jg. 19 1979, Nr. 10, S. 5044 – 5048
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On self-consistent approximations for random anharmonic systemsIn: Zeitschrift für Physik B: Condensed Matter , Jg. 27 1977, Nr. 2, S. 189 – 197
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The coherent potential approximation for mixtures of ortho- and para-hydrogenIn: Zeitschrift für Physik B: Condensed Matter , Jg. 27 1977, Nr. 1, S. 7 – 18
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Influence of isolated para-hydrogen molecules in solid ortho-hydrogen on the libron density of statesIn: Zeitschrift für Physik B: Condensed Matter , Jg. 24 1976, Nr. 2, S. 161 – 170
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Theory of librons for hydrogen crystals with low concentrations of J=0 impurities using the average T-matrix approximationIn: Zeitschrift für Physik B: Condensed Matter , Jg. 25 1976, Nr. 2, S. 197 – 206
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Parahydrogen in solid orthohydrogen : General theory and applications to the ortho-para conversion by neutron scatteringIn: Fizika Nizkikh Temperatur , Jg. 1 1975, S. 789 – 793
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Phonon- and libron-excitation with ortho-para conversions by neutron scattering on solid hydrogenIn: Zeitschrift für Physik B: Condensed Matter , Jg. 20 1975, Nr. 2, S. 137 – 146
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Para-hydrogen molecules in solid ortho-hydrogenIn: Zeitschrift für Physik , Jg. 271 1974, Nr. 3, S. 235 – 243
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The three-dimensional O(n) φ4 model on a strip with free boundary conditions : Exact results for a nontrivial dimensional crossover in the limit n→∞
MQFT-2015: 21-25 September 2015, St. Petersburg,St. Petersburg 2015Online Volltext (Open Access) -
Self-organization and structure formation : The universality principleIn: Physics: Physics research: topics, significance and prospects ; a report to society, policy-makers and industry / Scharf, Rainer (Hrsg.) 2002, S. 119 – 130
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Selbstorganisation und StrukturbildungIn: Physik: Themen, Bedeutung und Perspektiven physikalischer Forschung ; Denkschrift zum Jahr der Physik ; ein Bericht an Gesellschaft, Politik und Industrie / Scharf, Rainer (Hrsg.) 2000, S. 119 – 130
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LokalisierungIn: Supraleitung und verwandte Quantenphänomene: Tagungsband / 29. Febr. bis 11. März 1988 in der Kernforschungsanlage Jülich 1988, S. 9.1 – 9.26
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Field-theoretic approach to critical behavior at surfacesIn: Phase Transitions and critical phenomena, Vol. 10 / Domb, C.; Green, M. S. (Hrsg.) 1986
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Effects of surface exchange anisotropies on critical and multicritical behavior at surfacesIn: Applications of Field Theory to Statistical Mechanics: Proceedings / Sitges Conference on Statistical Mechanics Sitges, Barcelona/Spain, June 10–15, 1984 / Garrido, Luis (Hrsg.) 1985, S. 343 – 347
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Static and dynamic critical behavior at surfacesIn: Festkörperprobleme 25 / Grosse, P.; 5th General Conference of the Condensed Matter Division (CMD) 18-22 March 1985, Technische Universität Berlin 1985, S. 39 – 52
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CPA and Generalizations for Anharmonic SystemsIn: Proceedins of the International Conference on Lattice Dynamics / Paris, France; September 5-9, 1977 / Balkanski, Minko (Hrsg.) 1978, S. 356
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Solid o-p-Hydrogen : A Comparison of Theories of Statistically Disordered CrystalsIn: Quantum Fluids and Solids / Trickey, Samuel B.; Adams, E. Dwight; Dufty, James W. (Hrsg.) 1977, S. 315 – 322