The ``Spin Gap'' in Cuprate SuperconductorsThis paper was given at the Santa Barbara workshop on non-Fermi Liquids, June 1996. It was delayed in posting by a clerical error.Philip W. Anderson·Jan 27, 1998SaveLearn
Quantum phase transitions and thermodynamic properties in highly anisotropic magnetsThe systems exhibiting quantum phase transitions (QPT) are investigated within the Ising model in the transverse field and Heisenberg model with easy-plane single-site anisotropy. Near QPT a…V. Yu. Irkhin, A. A. Katanin·Jan 26, 1998SaveLearn
Charge screening and magnetic anisotropy in metallic rare-earth systemsThe calculation of magnetic anisotropy constants is performed beyond the point charge model for a continuous charge density distribution of screening conduction electrons. An important role of the…V. Yu. Irkhin, Yu. P. Irkhin·Jan 26, 1998SaveLearn
Remarks on Spin Gaps and Neutron Peak Selection Rules in YBCO - Do Interlayer Tunneling and Interlayer RVB as Mechanisms for Cuprate Superconductors Differ?This paper was submitted to Phys. Rev. Lett in an earlier version. This version was published in my book. It was delayed in posting by a clerical error.Philip W. Anderson·Jan 26, 1998SaveLearn
C-axis Electrodynamics as Evidence for the Interlayer Theory of High Tc SuperconductivityThis paper has been submitted to Science. It summarizes the experimental evidence for (and against) the interlayer theory. It was delayed in posting by clerical error.Philip W. Anderson·Jan 26, 1998SaveLearn
Excitations of a Bose-Einstein Condensate at Non-Zero Temperature: A Study of Zeroth, First and Second SoundCollective excitations of a dilute Bose gas were probed above and below the Bose-Einstein condensation temperature. The temperature dependencies of the frequency and damping rates of condensate…D. M. Stamper-Kurn, H. -J. Miesner, S. Inouye et al.·Jan 25, 1998SaveLearn
On the Photorefractive Gunn EffectWe present and numerically solve a model of the photorefractive Gunn effect. We find that high field domains can be triggered by phase-locked interference fringes, as it has been recently predicted…L. L. Bonilla, M. Kindelan, P. J. Hernando·Jan 24, 1998SaveLearn
Harmonic Vibrational Excitations in Disordered Solids and the "Boson Peak"We consider a system of coupled classical harmonic oscillators with spatially fluctuating nearest-neighbor force constants on a simple cubic lattice. The model is solved both by numerically…W. Schirmacher, G Diezemann, C. Ganter·Jan 23, 1998SaveLearn
Flat-band ferromagnetism induced by off-site repulsionsDensity matrix renormalization group method is used to analyze how the nearest-neighbor repulsion V added to the Hubbard model on 1D triangular lattice and a railway trestle (t-t') model will…Ryotaro Arita, Yukihiro Shimoi, Kazuhiko Kuroki et al.·Jan 23, 1998SaveLearn
Moisture induced Ageing in Granular MediaWe present experiments showing that a granular system of small beads does exhibit ageing properties : its maximum stability angle is measured to increase logarithmically with resting time, i.e. the…L. Bocquet, E. Charlaix, S. Ciliberto et al.·Jan 21, 1998SaveLearn
Local Spontaneous Symmetry Breaking for Film System Within Scalar ϕ4 Model for Phase TransitionThe difficulty is analysed in evaluating fluctuations in phase transition of finite-size system at temperature far below the critical point. Film system is discussed with one-component order…C. B. Yang, X. Cai·Jan 21, 1998SaveLearn
Electron-Phonon Coupling in Charged BuckminsterfullereneA simple, yet accurate solution of the electron-phonon coupling problem in C60 is presented. The basic idea behind it is to be found in the parametrization of the ground state electronic density…N. Breda, R. A. Broglia, G. Colo` et al.·Jan 20, 1998SaveLearn
Macroscopic Quantum Tunneling of a Bose-Einstein Condensate with Attractive InteractionA Bose-Einstein condensate with attractive interaction can be metastable if it is spatially confined and if the number of condensate bosons N0 is below a certain critical value N c. By…Masahito Ueda, Anthony J. Leggett·Jan 20, 1998SaveLearn
Invalidity of Classes of Approximated Hall Effect CalculationsIn this comment, I point out a number of approximated derivations for the effective equation of motion, now been applied to d-wave superconductors by Kopnin and Volovik are invalid. The major error…P. Ao·Jan 19, 1998SaveLearn
Multilayer Thermionic Refrigerator and GeneratorA new method of refrigeration is proposed. Cooling is obtained by thermionic emission of electrons over periodic barriers in a multilayer geometry. These could be either Schottky barriers between…G. D. Mahan, J. O. Sofo, M. Bartkowiak·Jan 19, 1998SaveLearn
Strong-Coupling ϕ4-Theory in 4- ε Dimensions and Critical ExponentsWith the help of variational perturbation theory we continue the renormalization constants ϕ4-theories in 4- ε dimensions to strong bare couplings g0 and find their power behavior in g0,…Hagen Kleinert·Jan 16, 1998SaveLearn
Semiclassical description of resonant tunnelingWe derive a semiclassical formula for the tunneling current of electrons trapped in a potential well which can tunnel into and across a wide quantum well. The calculations idealize an experimental…E. B. Bogomolny, D. C. Rouben·Jan 16, 1998SaveLearn
Quasi-static cracks and minimal energy surfacesWe compare the roughness of minimal energy(ME) surfaces and scalar ``quasi-static'' fracture surfaces(SQF). Two dimensional ME and SQF surfaces have the same roughness scaling, w sim Lzeta…V. I. Raisanen, E. T. Seppala, M. J. Alava et al.·Jan 15, 1998SaveLearn
Theory of imaging a photonic crystal with transmission near-field optical microscopyWhile near-field scanning optical microscopy (NSOM) can provide optical images with resolution much better than the diffraction limit, analysis and interpretation of these images is often difficult.…Garnett W. Bryant, Eric L. Shirley, Lori S. Goldner et al.·Jan 15, 1998SaveLearn
The generalized multi-channel Kondo model: Thermodynamics and fusion equationsThe SU(N) generalization of the multi-channel Kondo model with arbitrary rectangular impurity representations is considered by means of the Bethe Ansatz. The thermodynamics of the model is analyzed…N. Andrei, P. Zinn-Justin·Jan 15, 1998SaveLearn
Circuit model for spin-bottleneck resistance in magnetic-tunnel-junction devicesSpin-bottlenecks are created in magnetic-tunnel-junction devices by spatial inhomogeneity in the relative resistances for up and down spins. We propose a simple electrical circuit model for these…T. Jungwirth, A. H. MacDonald·Jan 14, 1998SaveLearn
Influence of exciton-phonon interaction on long energy transport in J-aggregatesThis paper presents a theoretical model intended to address the question of energy transfer in two-dimensional molecular assemblies such as Scheibe aggregates. A new phonon-exciton interaction is…E. A. Bartnik, M. Bednarz·Jan 14, 1998SaveLearn
Exact solution of a one-parameter family of asymmetric exclusion processesWe define a family of asymmetric processes for particles on a one-dimensional lattice, depending on a continuous parameter λ∈ [0,1] , interpolating between the completely asymmetric processes [1]…M. Alimohammadi, V. Karimipour, M. Khorrami·Jan 14, 1998SaveLearn
Remarks on ``Coloring Random Triangulation''We transform the two-matrix model, studied by P.Di Francesco and al., into a normal one-matrix model by identifying a ``formal'' integral used by these authors as a proper integral. We show…S. Balaska, W. Ruehl·Jan 14, 1998SaveLearn
A Systematic Improvement for Calculation to Conductivity in Anomalous Propagation of Surface Acoustic Wave at ν=1/2We report a systematic improvement to calculate the conductivity which associates to the anomaly of the propagation of surface acoustic waves at ν=1/2 above a two-dimensional electron gas. We try…Yue Yu·Jan 14, 1998SaveLearn