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Condensed Matter papers — page 128

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Pathways in Two-State Protein Folding
The thermodynamics of proteins indicate that folding/unfolding takes place either through stable intermediates or through a two-state process without intermediates. The rather short folding times of…
Audun Bakk, Johan S. Hoye, Alex Hansen et al.Dec 30, 1999
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Scenario of pseudogap in underdoped cuprate
So far, the theories of the cuprate pseudogap may be broadly divided into two main schools of though. One is based upon the idea that view the pseudogap as deriving from some of precursor…
Ping Lou, Hang-sheng WuDec 30, 1999
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Algebraic Geometry Approach to the Bethe Equation for Hofstadter Type Models
We study the diagonalization problem of certain Hofstadter-type models through the algebraic Bethe ansatz equation by the algebraic geometry method. When the spectral variables lie on a rational…
Shao-shiung Lin, Shi-shyr RoanDec 29, 1999
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Electron renormalization of sound interaction with two-level systems in superconducting metglasses
The crossing of temperature dependencies of sound velocity in the normal and the superconducting state of metallic glasses indicates renormalization of the intensity of sound interaction with…
E. V. Bezuglyi, A. L. Gaiduk, V. D. Fil et al.Dec 29, 1999
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Off-diagonal long-range order in one-dimensional many-body problem
We prove that there is off-diagonal long-range order in the symmetrised version of the one-dimensional many-body problem presented by Jain and Khare (Phys. Lett. A262 (1999)35). This model is related…
G. Auberson, S. R. Jain, A. KhareDec 24, 1999
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New approach to analysis of negative magnetoresistance. The statistics of the closed paths
It is shown that a new kind of information can be extracted from the Fourier transform of negative magnetoresistance (MR) in 2D semiconductor structures. The procedure proposed provides the…
G. M. Minkov, S. A. Negashev, O. E. Rut et al.Dec 24, 1999
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Quantum kinetic theory VII: The influence of vapor dynamics on condensate growth
We extend earlier models of the growth of a Bose-Einstein condensate to include the full dynamical effects of the thermal cloud by numerically solving a modified quantum Boltzmann equation. We…
M. J. Davis, C. W. Gardiner, R. J. BallaghDec 23, 1999
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Correlation energy, pair-distribution functions and static structure factors of jellium
We discuss and clarify a simple and accurate interpolation scheme for the spin-resolved electron static structure factor (and corresponding pair correlation function) of the 3D unpolarized…
Paola Gori-Giorgi, Francesco Sacchetti, Giovanni B. BacheletDec 23, 1999
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Phonon-Coupled Electron Tunneling in Two and Three-Dimensional Tunneling Configurations
We treat a tunneling electron coupled to acoustical phonons through a realistic electron phonon interaction: deformation potential and piezoelectric, in two or three-dimensional tunneling…
E. Pazy, B. LaikhtmanDec 23, 1999
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Quantum Kinetic Theory VI: The Growth of a Bose-Einstein Condensate
A detailed analysis of the growth of a BEC is given, based on quantum kinetic theory, in which we take account of the evolution of the occupations of lower trap levels, and of the full Bose-Einstein…
M. D. Lee, C. W. GardinerDec 22, 1999
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Thermodynamics of Heat Shock Response
Production of heat shock proteins are induced when a living cell is exposed to a rise in temperature. The heat shock response of protein DnaK synthesis in E.coli for temperature shifts from…
Kristine Bourke Arnvig, Steen Pedersen, Kim SneppenDec 22, 1999
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Valence band excitations in V2O5
We present a joint theoretical and experimental investigation of the electronic and optical properties of vanadium pentoxide. Electron energy-loss spectroscopy in transmission was employed to measure…
S. Atzkern, S. V. Borisenko, M. Knupfer et al.Dec 22, 1999
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Spintronic Spin Accumulation and Thermodynamics
The spin degree of freedom can play an essential role in determining the electrical transport properties of spin-polarized electron systems in metals or semiconductors. In this article, I address the…
A. H. MacDonaldDec 21, 1999
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Schwinger boson theory of anisotropic ferromagnetic ultrathin films
Ferromagnetic thin films with magnetic single-ion anisotropies are studied within the framework of Schwinger bosonization of a quantum Heisenberg model. Two alternative bosonizations are discussed.…
Carsten Timm, P. J. JensenDec 21, 1999
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Universality for 2D Wedge Wetting
We study 2D wedge wetting using a continuum interfacial Hamiltonian model which is solved by transfer-matrix methods. For arbitrary binding potentials, we are able to exactly calculate the wedge…
A. O. Parry, C. Rascon, A. J. WoodDec 21, 1999
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The mechanism for the 3 x 3 distortion of Sn/ge (111)
We show that two distinct 3 × 3 ground states, one nonmagnetic, metallic, and distorted, the other magnetic, semimetallic (or insulating) and undistorted, compete in α-phase adsorbates on…
S. de Gironcoli, S. Scandolo, G. Ballabio et al.Dec 20, 1999
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Ferromagnetic Semiconductor - Singlet (or Triplet) Superconductor - Ferromagnetic Semiconductor Systems as Possible Logic Circuits and Switches
We consider thin superconducting (S) films of thickness d ξ0, sandwiched between two ferromagnetic semiconducting insulators (FI) with differently orientated magnetizations - the FI-S-FI…
Miodrag L. Kulic, Martin EndresDec 17, 1999
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Two-mode theory of vortex stability in multicomponent Bose-Einstein condensates
We study the stability and dynamics of vortices in two-species condensates using a two mode model. The recent experimental results obtained at JILA (M. R. Matthews, et al., Phys. Rev. Lett. 83…
Victor M. Perez-Garcia, Juan J. Garcia-RipollDec 16, 1999
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Self-consistent cluster CPA methods and the nested CPA theory
The coherent potential approximation, CPA, is a useful tool to treat systems with disorder. Cluster theories have been proposed to go beyond the translation invariant single-site CPA approximation…
C. I. Ventura, R. A. Barrio, .Dec 16, 1999
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Nonlocal interactions prevent collapse in negative scattering length Bose-Einstein gases
We study the effect of nonlocality on the collapse properties of a self-focusing Nonlinear Schrödinger system related to Bose-Einstein condensation problems. Using a combination of moment techniques,…
Victor M. Perez-Garcia, V. V. Konotop, Juan J. Garcia-RipollDec 16, 1999
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Interdependence of magnetism and superconductivity in the borocarbide TmNi2B2C
We have discovered a new antiferromagnetic phase in TmNi2B2C by neutron diffraction. The ordering vector is QA = (0.48,0,0) and the phase appears above a critical in-plane magnetic field of 0.9 T.…
K. Noergaard, M. R. Eskildsen, N. H. Andersen et al.Dec 16, 1999
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Spin-1 chain doped with mobile S=1/2 fermions
We investigate doping of a two-orbital chain with mobile S=1/2 fermions as a valid model for Y2-xCaxBaNiO5. The S=1 spins are stabilized by strong, ferromagnetic (fm) Hund's rule…
Beat Ammon, Masatoshi ImadaDec 15, 1999
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Amorphous thin film growth: theory compared with experiment
Experimental results on amorphous ZrAlCu thin film growth and the dynamics of the surface morphology as predicted from a minimal nonlinear stochastic deposition equation are analysed and compared.…
M. Raible, S. G. Mayr, S. J. Linz et al.Dec 14, 1999
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Neutron scattering study of the field-induced soliton lattice in CuGeO3
CuGeO3 undergoes a transition from a spin-Peierls phase to an incommensurate phase at a critical field of Hc≈ 12.5 T. In the high-field phase a lattice of solitons forms, with both…
H. M. Ronnow, M. Enderle, D. F. McMorrow et al.Dec 14, 1999
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Comment on "Quantum Monte Carlo study of the dipole moment of CO" [J. Chem. Phys. 110, 11700 (1999)]
Recently Schautz and Flad concluded that the Hellmann-Feynman theorem holds within the fixed-node diffusion quantum Monte Carlo (DMC) method. We show that the Hellmann-Feynman expression is not in…
K. C. Huang, R. J. Needs, G. RajagopalDec 14, 1999
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