TY - JOUR
T1 - Spin dynamics from Majorana fermions
AU - Mao, W
AU - Coleman, P
AU - Hooley, Christopher
AU - Langreth, D
PY - 2003/11/1
Y1 - 2003/11/1
N2 - Using the Majorana fermion representation of spin-1/2 local moments, we show how the dynamic spin correlation and susceptibility are obtained directly from the one-particle Majorana propagator. We illustrate our method by applying it to the spin dynamics of a nonequilibrium quantum dot, computing the voltage-dependent spin relaxation rate and showing that, at weak coupling, the fluctuation-dissipation relation for the spin of a quantum dot is voltage dependent. We confirm the voltage-dependent Curie susceptibility recently found by Parcollet and Hooley [Phys. Rev. B 66, 085315 (2002)]].
AB - Using the Majorana fermion representation of spin-1/2 local moments, we show how the dynamic spin correlation and susceptibility are obtained directly from the one-particle Majorana propagator. We illustrate our method by applying it to the spin dynamics of a nonequilibrium quantum dot, computing the voltage-dependent spin relaxation rate and showing that, at weak coupling, the fluctuation-dissipation relation for the spin of a quantum dot is voltage dependent. We confirm the voltage-dependent Curie susceptibility recently found by Parcollet and Hooley [Phys. Rev. B 66, 085315 (2002)]].
UR - http://www.scopus.com/inward/record.url?scp=79961137204&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.91.207203
DO - 10.1103/PhysRevLett.91.207203
M3 - Article
C2 - 14683389
SN - 1079-7114
VL - 91
SP - 207203
JO - Physical Review Letters
JF - Physical Review Letters
IS - 20
ER -