Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/52967
Type: Artigo de periódico
Title: Magnetization, spin current, and spin-transfer torque from SU(2) local gauge invariance of the nonrelativistic Pauli-Schrodinger theory
Author: Dartora, CA
Cabrera, GG
Abstract: In this Brief Report, we consider local gauge symmetries of the nonrelativistic Pauli-Schrodinger theory. From the simplest free Lagrangian density for Pauli two-component spinors, we obtain the spin interaction with a magnetic field and define the spin-current vector without invoking relativistic theory. Applying U(1)xSU(2) local gauge symmetry, and proceeding via the Noether's theorem, we are able to construct a covariant conserved spin-current density in a natural way. Our approach allow us to understand the main features of spin transport properties and suggests that SU(2) is a fundamental symmetry of nonrelativistic quantum mechanics.
Country: EUA
Editor: Amer Physical Soc
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.78.012403
Date Issue: 2008
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

Files in This Item:
File Description SizeFormat 
WOS000258190000013.pdf83.29 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.