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Condensed Matter papers — page 229

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An Exactly Solvable Kondo Problem for Interacting One-Dimensional Fermions
The single impurity Kondo problem in the one-dimensional δ-potential Fermi gas is exactly solved for two sets of special coupling constants via Bethe ansatz. It is found that ferromagnetic Kondo…
Yupeng Wang, Johannes VoitSep 18, 1996
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Fluid Vesicles in Shear Flow
The shape dynamics of fluid vesicles is governed by the coupling of the flow within the two-dimensional membrane to the hydrodynamics of the surrounding bulk fluid. We present a numerical scheme…
Martin Kraus, Wolfgang Wintz, Udo Seifert et al.Sep 18, 1996
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Stability of vortex lines in liquid 3He-4He mixtures at zero temperature
At low temperatures and 3He concentrations below 6.6 %, there is experimental evidence about the existence in liquid helium mixtures, of stable vortices with 3He-rich cores. When the system is either…
D. Jezek, M. Guilleumas, M. Pi et al.Sep 18, 1996
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Properties of Fluctuations in Two Coupled Chains of Luttinger Liquids
Two chains of Luttinger liquids coupled by both interchain hopping and interchain interaction are investigated. A degeneracy of two kinds of dominant states with in phase and out of phase ordering in…
Hideo Yoshioka, Yoshikazu SuzumuraSep 18, 1996
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Frozen Disorder in a Driven System
We investigate the effects of quenched disorder on the universal properties of a randomly driven Ising lattice gas. The Hamiltonian fixed point of the pure system becomes unstable in the presence of…
B. Schmittmann, K. E. BasslerSep 17, 1996
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Self-consistent Treatment of Crystal-Electric-Field-Levels in the Anderson Lattice
We consider an Anderson lattice model with a spin 1/2 degenerated conduction electron band and localized ionic CEF-levels, classified according to the irreducible representation of the point group of…
F. B. Anders, D. L. CoxSep 17, 1996
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Low-Lying Electronic Excitations and Nonlinear Optic Properties of Polymers via Symmetrized Density Matrix Renormalization Group Method
A symmetrized Density Matrix Renormalization Group procedure together with the correction vector approach is shown to be highly accurate for obtaining dynamic linear and third order polarizabilities…
S. Ramasesha, Swapan K. Pati, H. R. Krishnamurthy et al.Sep 17, 1996
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Phase ordering of the O(2) model in the post-gaussian approximation
The gaussian closure approximation previously used to study the growth kinetics of the non-conserved O(n) model is shown to be the zeroth-order approximation in a well-defined sequence of…
Robert A. Wickham, Gene F. MazenkoSep 17, 1996
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Strong coupling phases of the t-t' Hubbard model
We study the strong coupling regime of the t-t' Hubbard model,filled up to the level of the van Hove singularities, by means of an exact diagonalization approach. We characterize the different…
J. Gonzalez, J. V. AlvarezSep 17, 1996
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On the gap structure of UPt3: phases A and B
We have used thermal conduction and transverse sound attenuation to probe the anisotropy of the gap structure in two superconducting phases of UPt3. For the low-temperature phase B, transverse…
Louis Taillefer, Brett Ellman, Benoit Lussier et al.Sep 17, 1996
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Stokes shift in quantum wells: trapping versus thermalization
Low temperature photoluminescence and photoluminescence excitation measurements have been performed in a set of InGaAs/GaAs samples with different indium molar fraction, well width, growth conditions…
A. Polimeni, A. Patanè, M. Grassi Alessi et al.Sep 17, 1996
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Renormalization-group study of a magnetic impurity in a Luttinger liquid
A generalized Anderson model for a magnetic impurity in an interacting one-dimensional electron gas is studied via a mapping onto a classical Coulomb gas. For weak potential scattering, the…
Avraham Schiller, Kevin IngersentSep 17, 1996
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The orbital and charge ordering in Pr1-xCaxMnO3 (x=0 and 0.5) from the ab initio calculations
The electronic structure of the doped manganites Pr1-xCaxMnO3 was calculated by the LSDA+U method which takes into account the local Coulomb interaction between d-electrons of transition…
V. I. Anisimov, I. S. Elfimov, M. A. Korotin et al.Sep 17, 1996
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Random Matrix Theory and Classical Statistical Mechanics. I. Vertex Models
A connection between integrability properties and general statistical properties of the spectra of symmetric transfer matrices of the asymmetric eight-vertex model is studied using random matrix…
H. Meyer, J. -C. Anglès d'Auriac, J. -M. MaillardSep 17, 1996
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Quantum and Thermal Depinning of a String from a Linear Defect
The problem of a massive elastic string depinning from a linear defect under the action of a small driving force is considered. To exponential accuracy the decay rate is calculated with the help of…
Mikhail A. SkvortsovSep 17, 1996
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Transverse optical plasmons in layered superconductors
We discuss the possible existance of transverse optical plasma modes in superlattices consisting of Josephson coupled superconducting layers. These modes appear as resonances in the current-current…
D. van der Marel, A. TsvetkovSep 17, 1996
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Spin-density wave versus superconducting fluctuations for quasi-one-dimensional electrons in two chains of Tomonaga-Luttinger liquids
We study possible states at low temperatures by applying the renormalization-group method to two chains of Tomonaga-Luttinger liquids with both repulsive intrachain interactions and interchain…
Hideo Yoshioka, Yoshikazu SuzumuraSep 17, 1996
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Metallic spin glasses
Recent work on the zero temperature phases and phase transitions of strongly random electronic system is reviewed. The transition between the spin glass and quantum paramagnet is examined, for both…
Subir Sachdev, N. ReadSep 17, 1996
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Phase Separation in the Two-Dimensional Hubbard Model
By making use of known exact results and symmetry properties for the one-band Hubbard model, we show in a somewhat exact manner that there is no phase separation on a square lattice at arbitrary…
Gang SuSep 17, 1996
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Radial distribution function of semiflexible polymers
We calculate the distribution function of the end--to--end distance of a semiflexible polymer with large bending rigidity. This quantity is directly observable in experiments on single semiflexible…
Jan Wilhelm, Erwin FreySep 17, 1996
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Dynamical Renormalization Group Study of a Conserved Surface Growth with Anti-Diffusive and Nonlinear Currents
Based on dynamical renormalization group (RG) calculations to the one-loop order, the surface growth described by a nonlinear stochastic conserved growth equation, ∂ h ∂ t = …
Youngkyun Jung, In-mook Kim, Yup KimSep 17, 1996
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Topological Dislocations and Mixed State of Charge Density Waves
We discuss the possibility of the ``mixed state'' in incommensurate charge density waves with three-dimensional order. It is shown that the mixed state can be created by applying an electric…
Masahiko Hayashi, Hideo YoshiokaSep 17, 1996
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A topological characterization of delocalization in a spin-orbit coupling system
We show that wavefunctions in a two-dimensional (2D) electron system with spin-orbit coupling can be characterized by a topological quantity--the Chern integer due to the existence of the intrinsic…
D. N. Sheng, Z. Y. WengSep 17, 1996
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Non Fermi Liquid Dynamics of the Two-Channel Kondo Lattice
The paramagnetic phase of the two-channel Kondo lattice model is examined with a Quantum Monte Carlo simulation in the limit of infinite dimensions. We find non-Fermi-liquid behavior at low…
M. Jarrell, Hanbin Pang, D. L. Cox et al.Sep 17, 1996
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Dynamical Vortices in Superfluid Films
The coupling of vortices to phonons in a superfluid is a gauge coupling dictated by topology. The density and current response to a moving vortex are computed and contrasted with the standard…
D. P. Arovas, J. A. FreireSep 16, 1996
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