RPAE versus RPA for the Tomonaga model with quadratic energy dispersion
K. Schonhammer
Recently, the damping of the collective charge (and spin) modes of interacting fermions in one spatial dimension was studied. It results from the nonlinear correction to the energy dispersion in the vicinity of the Fermi points. To investigate the damping, one has to replace the random-phase approxi ... [Phys. Rev. B 75, 205103 (2007)] published Thu May 3, 2007.
Multi-k magnetic structures in USb[sub 0.9]Te[sub 0.1] and UAs[sub 0.8]Se[sub 0.2] observed via resonant x-ray scattering at the U M[sub 4] edge
B. Detlefs, S. B. Wilkins, P. Javorsky, E. Blackburn, and G. H. Lander
Experiments with resonant photons at the U M[sub 4] edge have been performed on a sample of USb[sub 0.9]Te[sub 0.1], which has an incommensurate magnetic structure with [bold k]=k=0.596(2) reciprocal lattice units. The reflections of the form
Magnetic anisotropy in doped and undoped LiFePO[sub 4] single crystals
D. P. Chen, Xiaolin Wang, Y. S. Hu, C. T. Lin, S. X. Dou et al.
We report on the magnetic anisotropic properties of pure and Mg doped LiFePO[sub 4] single crystals grown by the traveling solvent floating zone technique. Our results reveal a considerable anisotropy in the susceptibilities along H||a, H||b, and H||c for both crystals. LiFePO[sub 4] and Li[sub 0.99 ... [J. Appl. Phys. 101, 09N512 (2007)] published Thu May 3, 2007.
Magnetocaloric properties of Fe and Ge doped Ni[sub 2]Mn[sub 1 - x]Cu[sub x]Ga
Mahmud Khan, Shane Stadler, and Naushad Ali
The magnetocaloric properties of Fe and Ge doped Ni[sub 2]Mn[sub 0.75]Cu[sub 0.25]Ga Heusler alloys have been investigated. Using Ni[sub 2]Mn[sub 0.75]Cu[sub 0.25]Ga as the parent material, the Fe doped system (Ni[sub 2]Mn[sub 1x](CuFe)[sub x]Ga) and a Ge doped system (Ni[sub 2]Mn[sub 1x]Cu[sub x]Ga ... [J. Appl. Phys. 101, 09C515 (2007)] published Thu May 3, 2007.
Evidence for the PSL(2|2) Wess-Zumino-Novikov-Witten model as a model for the plateau transition in the quantum Hall effect: Evaluation of numerical simulations
A. M. Tsvelik
In this paper, I revise arguments in favor of the PSL(2|2) Wess-Zumino-Novikov-Witten (WZNW) model as a theory of the plateau transition in integer quantum Hall effect. I show that all available numerical data (including the correlation length exponent nu) are consistent with the predictions of such ... [Phys. Rev. B 75, 184201 (2007)] published Wed May 2, 2007.
Induced effects by the substitution of Mg in MgCNi[sub 3]
Guohua Zhong, Jianglong Wang, Zhi Zeng, Xiaohong Zheng, and Haiqing Lin
The electronic structures and magnetic properties induced by the substitution of Mg in MgCNi[sub 3] were investigated by performing the first-principles density functional calculations. It is confirmed that AlCNi[sub 3], GaCNi[sub 3], and InCNi[sub 3] are paramagnetic nonsuperconductors resulting fr ... [J. Appl. Phys. 101, 09G520 (2007)] published Wed May 2, 2007.
The reversible susceptibility tensor of synthetic antiferromagnets
Dorin Cimpoesu, Alexandru Stancu, and Leonard Spinu
In this work we propose to study the reversible susceptibility tensor (including the transverse susceptibility components) of a synthetic antiferromagnetic (SAF) structure. This study is motivated by the fact that knowing the magnetic anisotropy of SAF structure is essential for the device functioni ... [J. Appl. Phys. 101, 09D112 (2007)] published Wed May 2, 2007.
Ultrafast optical modification of magnetic anisotropy and stimulated precession in an epitaxial Co[sub 2]MnAl thin film
Y. Liu, L. R. Shelford, V. V. Kruglyak, R. J. Hicken, Y. Sakuraba et al.
An all-optical pump-probe method was used to study magnetization precession in an epitaxial Co[sub 2]MnAl Heusler alloy thin film. The frequency and amplitude of precession showed a clear fourfold variation as the orientation of the static field was applied in different directions within the plane o ... [J. Appl. Phys. 101, 09C106 (2007)] published Wed May 2, 2007.
Physics Update
Phillip F. Schewe, Benjamin P. Stein, and Bertram Schwarzchild
... [Phys. Today 60, 23 (2007)] published Tue May 1, 2007.
Interface atomic structure and magnetic anisotropy in ultrathin Fe films grown by thermal deposition and pulsed laser deposition on GaAs(001)
B. Kardasz, J. Zukrowski, O. Mosendz, M. Przybylski, B. Heinrich et al.
Thermal deposition (TD) and pulsed laser deposition (PLD) techniques were used to prepare GaAs/Fe(001) crystalline ultrathin films. The magnetic environment of Fe at the Fe/GaAs(001) interface was investigated by means of conversion electron Mossbauer spectroscopy using an [sup 57]Fe probe layer hav ... [J. Appl. Phys. 101, 09D110 (2007)] published Tue May 1, 2007.
Effect of Measurement Probes upon the Conductance of an Interacting Nanosystem: Detection of an Attached Ring by Nonlocal Many Body Effects
Axel Freyn and Jean-Louis Pichard
We consider a nanosystem connected to measurement probes via leads. When a magnetic flux is varied through a ring attached to one lead at a distance L[sub c] from the nanosystem, the effective nanosystem transmission |t[sub s]|[sup 2] exhibits Aharonov-Bohm oscillations if the electrons interact ins ... [Phys. Rev. Lett. 98, 186401 (2007)] published Mon Apr 30, 2007.
Seeing emergent phases in quantum Hall double layers
Vittorio Pellegrini, Stefano Luin, Biswajit Karmakar, Aron Pinczuk, Brian S. Dennis et al.
We review recent studies by optics methods of emergent phases in the quantum Hall (QH) regimes of double layers with finite tunneling at Landau level filling factor nu=1. In measurements of spin excitations by inelastic light scattering and of elastically scattered Rayleigh light under the applicati ... [J. Appl. Phys. 101, 081718 (2007)] published Fri Apr 27, 2007.
Metastable domains and potential energy surfaces in organic charge-transfer salts with neutral-ionic phase transitions
Zoltan G. Soos and Anna Painelli
A modified Hubbard model with linear coupling to both lattice phonons and molecular vibrations is applied to the structural and electronic instabilities of organic charge-transfer (CT) salts such as tetrathiafulvalene-chloranil (TTF-CA). The potential energy surface (PES) of the correlated model is ... [Phys. Rev. B 75, 155119 (2007)] published Fri Apr 27, 2007.
Reversible susceptibility studies of magnetization switching in FeCoB synthetic antiferromagnets
Cosmin Radu, Dorin Cimpoesu, Erol Girt, Ganping Ju, Alexandru Stancu et al.
In this paper we present a study of switching characteristics of a series of synthetic antiferromagnet (SAF) structures using reversible susceptibility experiments. Three series of SAF samples were considered in our study with (t1, t2), the thickness of the FeCoB layers of (80 nm, 80 nm), (50 nm, ... [J. Appl. Phys. 101, 09D109 (2007)] published Fri Apr 27, 2007.
Quantum critical transport, duality, and M theory
Christopher P. Herzog, Pavel Kovtun, Subir Sachdev, and Dam Thanh Son
We consider charge transport properties of 2+1 dimensional conformal field theories at nonzero temperature. For theories with only Abelian U(1) charges, we describe the action of particle-vortex duality on the hydrodynamic-to-collisionless crossover function: this leads to powerful functional constr ... [Phys. Rev. D 75, 085020 (2007)] published Fri Apr 27, 2007.
The Equivalence of Transfer Matrix Method and Boson Hamiltonian Approach Calculations in Ferromagnetic Superlattices
S. D. Stojanović, M. V. Pavkov-Hrvojević, and M. J. Škrinjar
The energy of elementary excitations in the superlattice consisting of ferromagnetic planes interacting ferromagnetically described by the Heisenberg ferromagnet is discussed. Standard approach is to linearize the equations of motion for the particular spins and formulate the transfer matrix for the ... [AIP Conf. Proc. 899, 658 (2007)] published Fri Apr 27, 2007.
Magnetization and Spin Susceptibility of an Interacting Two-Dimensional Electron Gas
A. L. Subasi and B. Tanatar
We study the magnetic behavior and in particular the spin susceptibility of an interacting two-dimensional electron gas in a finite in-plane magnetic field. The total energy of the system is constructed using the recent quantum Monte Carlo simulation based parametrized correlation energy as a functi ... [AIP Conf. Proc. 899, 283 (2007)] published Fri Apr 27, 2007.
Percolation under Quantum Hall Effect Conditions
Valeriy Arkhincheev
The percolation under Quantum Hall Effect conditions in inhomogeneous medium is studied. The lower and upper bound values are founded, which are different from values for metal conductivity. It is connected with unusual character of current percolation under QHE regime. (C)2007 American Institute of ... [AIP Conf. Proc. 899, 235 (2007)] published Fri Apr 27, 2007.
Using magnetostriction to measure the spin-spin correlation function and magnetoelastic coupling in the quantum magnet NiCl$_2$-4SC(NH$_2$)$_2$. [arXiv:0705.0365v1]
ePrint arXiv http://arXiv.org/
Electron Doping of Cuprates via Interfaces with Manganites. [arXiv:0705.0498v1]
ePrint arXiv http://arXiv.org/
Microwave Absorption of Surface-State Electrons on Liquid $^3$He. [arXiv:0705.0417v1]
ePrint arXiv http://arXiv.org/
Quantum spin correlations in an organometallic alternating sign chain. [arXiv:0705.0523v1]
ePrint arXiv http://arXiv.org/
One-Particle Anomalous Excitations of Gutzwiller Projected BCS Superconductors and Bogoliubov Quasi-Particle Characteristics. [arXiv:cond-mat/0610444v2 UPDATED]
ePrint arXiv http://arXiv.org/
Towards the Groundstate of a 2D Spin-1 Frustrated Heisenberg Model. [arXiv:cond-mat/0611170v3 UPDATED]
ePrint arXiv http://arXiv.org/
Electron transmission between normal and heavy electron metallic phases in a Kondo lattice system. [arXiv:cond-mat/0602060v2 UPDATED]
ePrint arXiv http://arXiv.org/
Stripeless incommensurate magnetism in a doped strongly correlated oxide. [arXiv:cond-mat/0608575v3 UPDATED]
ePrint arXiv http://arXiv.org/