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LEI Optics, Inc. formerly Lightwave Enterprises, Inc.

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Recent Articles in Phys. Rev. B
Recent articles in Physical Review B
Embedded atom method potentials for Al-Pd-Mn phases Author(s): Daniel Schopf, Peter Brommer, Benjamin Frigan, and Hans-Rainer Trebin A novel embedded atom method (EAM) potential for the ? phases of Al-Pd-Mn has been determined with the force-matching method. Different combinations of analytic functions were tested for the pair and transfer part. The best results are obtained if one allows for oscillations on two different length ... [Phys. Rev. B 85, 054201] Published Fri Feb 03, 2012 Ordering process and ferroelectricity in a spinel derived from FeV_{2}O_{4} Author(s): Q. Zhang, K. Singh, F. Guillou, C. Simon, Y. Breard, V. Caignaert, and V. Hardy The spinel FeV₂O₄ is known to exhibit peculiar physical properties, which is generally ascribed to the unusual presence of two cations showing a pronounced interplay between spin, orbital, and lattice degrees of freedom (Fe²⁺ and V³⁺ on the tetrahedral and octahedral sites, respectively). The presen... [Phys. Rev. B 85, 054405] Published Fri Feb 03, 2012 Complex mixed state of the Pauli-limited superconductor CeCoIn_{5} Author(s): X. Gratens, L. Mendonça-Ferreira, Y. Kopelevich, N. F. Oliveira, Jr., R. R. Urbano, R. A. Ribeiro, R. Movshovich, J. L. Sarrao, J. D. Thompson, Z. Fisk, and P. G. Pagliuso Magnetization measurements were performed on CeCoIn₅ at temperatures down to 20 mK and magnetic fields up to 17 T applied along different crystallographic orientations. For field configurations nearly parallel to the ab plane (??40^? and T?50 mK), we have found an intriguing vortex dynamics regime re... [Phys. Rev. B 85, 054502] Published Fri Feb 03, 2012 Quasiclassical and ultraquantum decay of superfluid turbulence Author(s): A. W. Baggaley, C. F. Barenghi, and Y. A. Sergeev We address a question which, after a decade-long discussion, still remains open: what is the nature of the ultraquantum regime of decay of quantum turbulence? The model developed in this work reproduces both the ultraquantum and the quasiclassical decay regimes and explains their hydrodynamical natu... [Phys. Rev. B 85, 060501] Published Fri Feb 03, 2012 Asymmetric magnetization reversal in dipolarly coupled spin valve structures with perpendicular magnetic anisotropy Author(s): M. Gottwald, M. Hehn, D. Lacour, T. Hauet, F. Montaigne, S. Mangin, P. Fischer, M.-Y. Im, and A. Berger Magnetization reversal has been studied in a Co₇₄Tb₂₆/Cu/Co₈₈Tb₁₂ system, which is a perpendicularly magnetized ferrimagnetic bilayer separated by a nonmagnetic layer. The Co₈₈Tb₁₂ (soft) layer (SL) exhibits a switching field much lower than the Co₇₄Tb₂₆ (hard) layer (HL), which enabled us to study ... [Phys. Rev. B 85, 064403] Published Fri Feb 03, 2012 Regimes of flux transport at microwave frequencies in nanostructured high-T_{c} films Author(s): R. Wördenweber, E. Hollmann, J. Schubert, R. Kutzner, and G. Panaitov We report on combined dc and microwave electronic measurements of magnetic flux transport in micron and submicron-patterned high-T_c films. In a given temperature regime below the superconducting transition temperature T_c, the current-driven flux transport is restricted to flux motion guided by the s... [Phys. Rev. B 85, 064503] Published Fri Feb 03, 2012 Variable group delay in a metamaterial with field-gradient-induced transparency Author(s): Yasuhiro Tamayama, Toshihiro Nakanishi, and Masao Kitano We realize variable control of the group delay in an electromagnetically induced transparency-like metamaterial. Its unit cell is designed to have a bright mode and a dark mode. The coupling strength between these two modes is determined by the electromagnetic field gradient. In this metamaterial wi... [Phys. Rev. B 85, 073102] Published Fri Feb 03, 2012 Electrically detected spin echoes of donor nuclei in silicon Author(s): D. R. McCamey, C. Boehme, G. W. Morley, and J. van Tol The ability to electrically probe the spin properties of solid state systems underlies a wide variety of emerging technologies. Here, we demonstrate the electrical readout of the nuclear spin states of phosphorus donors in silicon in the coherent regime with modified Hahn echo sequences. We find tha... [Phys. Rev. B 85, 073201] Published Fri Feb 03, 2012 Finite-length charge-density waves on terminated atomic wires Author(s): Jin Sung Shin, Kyung-Deuk Ryang, and Han Woong Yeom Finite-size effects in charge-density waves (CDWs) were unveiled using scanning tunneling microscopy for metallic atomic wires on the Au/Si(553) surface, as terminated by adsorbate impurities. We found that CDW formed at low temperature adopts the finite-length boundary condition in two distinct way... [Phys. Rev. B 85, 073401] Published Fri Feb 03, 2012 Correlation effects in bistability at the nanoscale: Steady state and beyond Author(s): E. Khosravi, A.-M. Uimonen, A. Stan, G. Stefanucci, S. Kurth, R. van Leeuwen, and E. K. U. Gross The possibility of finding multistability in the density and current of an interacting nanoscale junction coupled to semi-infinite leads is studied at various levels of approximation. The system is driven out of equilibrium by an external bias and the nonequilibrium properties are determined by real... [Phys. Rev. B 85, 075103] Published Fri Feb 03, 2012

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