Cosmology, Particle Physics and Superfluid 3HeMany direct parallels connect superfluid 3He with the field theories describing the physical vacuum, gauge fields and elementary fermions. Superfluid 3He exhibits a variety of topological defects…G. E. Volovik·Jul 30, 1996SaveLearn
Coherence-Incoherence Transition Between Fermi and Luttinger liquidsWe consider conditions for existence of fermionic quasiparticles in a strongly anisotropic quasi-one-dimensional metal. The adopted model is a model of chains of spin-1/2 Luttinger liquid coupled by…A. M. Tsvelik·Jul 29, 1996SaveLearn
Spin-Orbit Assisted Variable-Range Hopping in Strong Magnetic FieldsIt is shown that in the presence of strong magnetic fields, spin-orbit scattering causes a sharp increase in the effective density of states in the variable-range hopping regime when temperature…Yigal Meir, Boris L. Altshuler·Jul 29, 1996SaveLearn
Long-range interactions and non-extensivity in ferromagnetic spin modelsThe Ising model with ferromagnetic interactions that decay as 1/rα is analyzed in the non-extensive regime 0≤α≤ d, where the thermodynamic limit is not defined. In order to study the…S. A. Cannas, F. A. Tamarit·Jul 29, 1996SaveLearn
Two-Channel Kondo Physics from Tunnelling Impurities with Triangular SymmetryTunnelling impurities in metals have been known for some time to have the potential for exhibiting Kondo-like physics. However previous models based on an impurity hopping between two equivalent…Aris L. Moustakas, Daniel S. Fisher·Jul 29, 1996SaveLearn
Spin-one ferromagnets with single-ion anisotropy in a perpendicular external fieldIn this paper, the conventional Holstein-Primakoff method is generalized with the help of the characteristic angle transformation [Lei Zhou and Ruibao Tao, J. Phys. A 27 5599 (1994)] for the…Lei Zhou, Ruibao Tao·Jul 29, 1996SaveLearn
Microscopic calculation of the phonon-roton branch in superfluid 4HeDiffusion Monte Carlo results for the phonon-roton excitation branch in bulk liquid 4He at zero temperature are presented. The sign problem associated to the excited wave function has been dealt…J. Boronat, J. Casulleras·Jul 29, 1996SaveLearn
Can Hall drag be observed in Coulomb coupled quantum wells in a magnetic field?We study the transresistivity ρ21 (or equivalently, the drag rate) of two Coulomb-coupled quantum wells in the presence of a perpendicular magnetic field, using semi-classical transport…Ben Yu-Kuang Hu·Jul 29, 1996SaveLearn
Intermediate-Coupling Theory for the Spectral Weight of Spin PolaronWithin the intermediate-coupling theory, the quasiparticle weight Z of one hole injected in the undoped antiferromagnetic ground state is studied. We find that, for the hole located at the…Min-Fong Yang·Jul 29, 1996SaveLearn
Instability, Intermittency and Multiscaling in Discrete Growth Models of Kinetic RougheningWe show by numerical simulations that discretized versions of commonly studied continuum nonlinear growth equations (such as the Kardar-Parisi-Zhang equation and the Lai-Das Sarma equation) and…C. Dasgupta, J. M. Kim, M. Dutta et al.·Jul 29, 1996SaveLearn
Critical behavior of weakly-disordered anisotropic systems in two dimensionsThe critical behavior of two-dimensional (2D) anisotropic systems with weak quenched disorder described by the so-called generalized Ashkin-Teller model (GATM) is studied. In the critical region this…Giancarlo Jug, Boris N. Shalaev·Jul 28, 1996SaveLearn
Evidence of magnetization-dependent polaron formation in La1-xAxMnO3, A=Ca, PbX-ray-absorption fine-structure measurements at the Mn K-edge as a function of temperature were performed on samples of La1-xCaxMnO3 and La0.67Pb0.33MnO3. All samples have a…C. H. Booth, F. Bridges, G. J. Snyder et al.·Jul 28, 1996SaveLearn
Charge frustration in complex fluids and in electronic systemsThe idea of charge frustration is applied to describe the properties of such diverse physical systems as oil-water-surfactant mixtures and metal-ammonia solutions. The minimalist charge-frustrated…Carlo Carraro·Jul 27, 1996SaveLearn
Temperature Evolution of the Quantum Hall Effect in Quasi-One-Dimensional Organic ConductorsThe Hall conductivity in the magnetic-field-induced spin-density-wave (FISDW) state of the quasi-one-dimensional organic conductors (TMTSF)2X at a finite temperature is calculated. The temperature…Hsi-Sheng Goan, Victor M. Yakovenko·Jul 27, 1996SaveLearn
Algebraic approach to renormalizationIn close analogy to the Bloch-Feshbach formalism known from the theory of nuclear dynamics, I develop a mathematical framework that allows one to understand renormalization in terms of purely…Jochen Rau·Jul 27, 1996SaveLearn
Decay of isolated surface features driven by the Gibbs-Thomson effect in analytic model and simulationA theory based on the thermodynamic Gibbs-Thomson relation is presented which provides the framework for understanding the time evolution of isolated nanoscale features (i.e., islands and pits) on…James G. McLean, B. Krishnamachari, D. R. Peale et al.·Jul 26, 1996SaveLearn
Field Theory of Quantum Antiferromagnets : From the Triangular to the Kagome LatticeWe analyse a family of models, that interpolates between the Triangular lattice antiferromagnet (TLAF) and the Kagome lattice antiferromagnet (KLAF). We identify the field theories governing the low…D. Shubashree, R. Shankar·Jul 26, 1996SaveLearn
New Renormalization Group Results for Scaling of Self-Avoiding Tethered MembranesThe scaling properties of self-avoiding polymerized 2-dimensional membranes are studied via renormalization group methods based on a multilocal operator product expansion. The renormalization group…Kay Joerg Wiese, Francois David·Jul 26, 1996SaveLearn
Two point-contact interferometer for quantum Hall systemsWe propose a device, consisting of a Hall bar with two weak barriers, that can be used to study quantum interference effects in a strongly correlated system. We show how the device provides a way of…C. de C. Chamon, D. E. Freed, S. A. Kivelson et al.·Jul 26, 1996SaveLearn
The Density Matrix Renormalization Group Studies of Metal-Halogen Chains within a Two-Band Extended Peierls-Hubbard ModelThe phase diagram of halogen-bridged mixed-valent metal complexes (MX) has been studied using a two-band extended Peierls-Hubbard model employing the recently developed Density Matrix…Y. Anusooya, Swapan K Pati, S. Ramasesha·Jul 26, 1996SaveLearn
Classification of Perturbations for Membranes with Bending RigidityA complete classification of the renormalization-group flow is given for impurity-like marginal operators of membranes whose elastic stress scales like (Δr)2 around the external critical dimension…Kay Joerg Wiese·Jul 26, 1996SaveLearn
Local-moment formation in gapless Fermi systemsPerturbative scaling is applied to the Anderson model for a localized level coupled to a Fermi system in which the density of states varies like |E|r near the Fermi energy (E=0). This model with…Carlos Gonzalez-Buxton, Kevin Ingersent·Jul 26, 1996SaveLearn
Frustration-induced non-Fermi-liquid behavior in a three-impurity Kondo modelA Kondo model for three spin-one-half impurities placed at the vertices of an equilateral triangle is studied using the numerical renormalization-group method. The impurity spins can form two…Bruce C. Paul, Kevin Ingersent·Jul 26, 1996SaveLearn
Transmission spectrum of a tunneling particle interacting with dynamical fields: real-time functional-integral approachA real-time functional-integral method is used to derive an effective action that gives the transmission spectrum of a tunneling particle interacting with a bath of harmonic oscillators. The…Masahito Ueda·Jul 26, 1996SaveLearn
Renormalization Group Theory of the Three-Dimensional Dilute Bose GasWe study the three-dimensional atomic Bose gas using renormalization group techniques. Using our knowledge of the microscopic details of the interatomic interaction, we determine the correct initial…M. Bijlsma, H. T. C. Stoof·Jul 26, 1996SaveLearn