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Condensed Matter papers — page 29

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Remarkable site selectivity properties of the ARPES matrix element in Bi2Sr2CaCu2O8
We show that the ARPES spectra for emission from the bonding as well as the antibonding Fermi surface sheet in Bi2Sr2CaCu2O8 (Bi2212) possess remarkable site selectivity properties in…
S. Sahrakorpi, M. Lindroos, A. BansilApr 11, 2003
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Spin Photocurrents in Quantum Wells review part II, (part I: cond-mat/0304266)
Spin photocurrents generated by homogeneous optical excitation with circularly polarized radiation in quantum wells (QWs) are reviewed. The absorption of circularly polarized light results in optical…
S. D. Ganichev, W. PrettlApr 11, 2003
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Spin Photocurrents in Quantum Wells review part I, (part II: cond-mat/one of the next numbers)
Spin photocurrents generated by homogeneous optical excitation with circularly polarized radiation in quantum wells (QWs) are reviewed. The absorption of circularly polarized light results in optical…
S. D. Ganichev, W. PrettlApr 11, 2003
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Critical behavior of a bounded Kardar-Parisi-Zhang equation
A host of spatially extended systems, both in physics and in other disciplines, are well described at a coarse-grained scale by a Langevin equation with multiplicative-noise. Such systems may exhibit…
Miguel A. Munoz, F. de los Santos, A. AchahbarApr 10, 2003
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Rotational states of Bose gases with attractive interactions in anharmonic traps
A rotated and harmonically trapped Bose gas with attractive interactions is expected to either remain stationary or escape from the trap. Here we report that, on the contrary, in an anharmonic…
Emil Lundh, Anssi Collin, Kalle-Antti SuominenApr 8, 2003
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Electrons on Hexagonal lattices and applications to nanotubes
We consider a Froehlich-type Hamiltonian on a hexagonal lattice. Aiming to describe nanotubes, we choose this 2-dimensional lattice to be periodic and to have a large extension in one (x) direction…
Betti Hartmann, Wojtek J. ZakrzewskiApr 8, 2003
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Noncommutative deformation and a topological nature of singularity Koiter
In this paper we constructed the model of noncommutative plastic deformation and give the proof of hypothesis Koiter. We showed, that occurrence of singularity Koiter has the topological reasons and…
Trinh V. KApr 8, 2003
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Quantum spherical spin models
A recently introduced class of quantum spherical spin models is considered in detail. Since the spherical constraint already contains a kinetic part, the Hamiltonian need not have kinetic term. As a…
R. Serral Gracia, Th. M. NieuwenhuizenApr 7, 2003
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Three-dimensional quasi-Tonks gas in a harmonic trap
We analyze the macroscopic dynamics of a Bose gas in a harmonic trap with a superimposed two-dimensional optical lattice, assuming a weak coupling between different lattice sites. We consider the…
P. Pedri, L. SantosApr 7, 2003
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Deformation of dark solitons in inhomogeneous Bose-Einstein condensates
A dark soliton becomes unstable when it is incident on a background density gradient, and the induced instability results in the emission of sound. Detailed quantitative studies of sound emission are…
N. G. Parker, N. P. Proukakis, M. Leadbeater et al.Apr 7, 2003
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q-Plastic deformation
It is known that the appearance of the order state in continuous medium is the result of the spontaneous breaking of the symmetry. The collective fashion was used in the role of carrier maintaining…
Trinh Van KhoaApr 7, 2003
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Measurement-induced spin squeezing in a cavity
Spin squeezing of an ensemble of N atoms in a high-Q cavity is shown to be enhanced by continuous measurement of photons in the cavity. A degree of spin squeezing proportional to N-1/3 is attained…
Hiroki Saito, Masahito UedaApr 5, 2003
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On the extra phase correction to the semiclassical spin coherent-state propagator
The problem of an origin of the Solary-Kochetov extra-phase contribution to the naive semiclassical form of a generalized phase-space propagator is addressed with the special reference to the su(2)…
Mikhail PletyukhovApr 4, 2003
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Nonlocal pseudopotentials and magnetic fields
We show how to describe the coupling of electrons to non-uniform magnetic fields in the framework of the widely used norm-conserving pseudopotential appro ximation for electronic structure…
Chris J. Pickard, Francesco MauriApr 4, 2003
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Current Status of the Proposals for Unification of Notations and Guidelines for Data Presentation in the EMR Area: Blueprint for Future Actions
The tremendous development of the electron magnetic resonance (EMR), i.e. EPR, ESR, and related spectroscopic techniques, and their applications in a number of fields is accompanied by a rather messy…
Czeslaw RudowiczApr 4, 2003
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On the fundamental conceptual problems in magnetism
An extensive survey of misinterpretations and misconceptions concerning presentation of the hysteresis loop for ferromagnetic materials occurring in undergraduate textbooks as well as in recent…
Czeslaw RudowiczApr 4, 2003
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Predicting Multivariate Volatility
We suggest two classes of multivariate GARCH--models which are both easy to estimate and perform well in forecasting the covariance matrix of more than one hundred stocks. We apply methods from…
C. Reese, B. RosenowApr 3, 2003
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Magnetic orderings in Al nanowires suspended between electrodes
A theoretical analysis of a relation between atomic and spin-electronic structures for the ground state of single-row aluminum nanowires suspended between Al(001) electrodes is demonstrated using…
Tomoya Ono, Shigeru Tsukamoto, Kikuji HiroseApr 2, 2003
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Anisotropic spin splitting and spin relaxation in asymmetric zinc-blende semiconductor quantum structures
Spin relaxation due to the D'yakonov-Perel' mechanism is intimately related with the spin splitting of the electronic states. We determine the spin relaxation rates from anisotropic spin…
J. Kainz, U. Roessler, R. WinklerApr 1, 2003
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Adaptive design of nano-scale dielectric structures for photonics
Using adaptive algorithms, the design of nano-scale dielectric structures for photonic applications is explored. Widths of dielectric layers in a linear array are adjusted to match target responses…
Yu Chen, Rong Yu, Weifei Li et al.Apr 1, 2003
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Study of the formation and decay of electron-hole plasma clusters in a direct-gap semiconductor CuCl
The master equation for the cluster-size distribution function is solved numerically to investigate the electron-hole droplet formation claimed to be discovered in the direct-gap CuCl excited by…
L. Jiang, M. W. Wu, M. Nagai et al.Apr 1, 2003
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Discrete small world networks
Small world models are networks consisting of many local links and fewer long range 'shortcuts', used to model networks with a high degree of local clustering but relatively small diameter.…
A. D. Barbour, G. ReinertApr 1, 2003
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Local induction approximation in the theory of superfluid turbulence. Numerical consideration
The local induction approximation (LIA) of the Biot-Savart law is often used for numerical and analytical investigations of vortex dynamics in the theory of superfluid turbulence. In this paper,…
M. V. NedoboikoMar 31, 2003
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Effect of Antiferromagnetic Interlayer Coupling on Current-Assisted Magnetization Switching
We compare magnetization switching in Co/Cu/Co nanopillars with uncoupled and dipole-field coupled Co layers. In uncoupled nanopillars, current-driven switching is hysteretic at low magnetic field H…
S. Urazhdin, H. Kurt, W. P. Pratt et al.Mar 28, 2003
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Novel interaction induced oscillations in correlated electron transport
The correlated motion of electrons in a one dimensional system with an externally applied longitudinal electric field is discussed. Within the tight binding model we show that in addition to the well…
F. Claro, J. F. Weisz, S. CurilefMar 27, 2003
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