Electrical control of spin dynamics in finite one-dimensional systems
Citation:
A. Pertsova, M. Stamenova, and S. Sanvito, Electrical control of spin dynamics in finite one-dimensional systems, Physical Review B, 84, 15, 2011, 155436-Download Item:
Abstract:
We investigate the possibility of the electrical control of spin transfer in monoatomic chains incorporating
spin impurities. Our theoretical framework is the mixed quantum-classical (Ehrenfest) description of the spin
dynamics, in the spirit of the
s
-
d
model, where the itinerant electrons are described by a tight-binding model
while localized spins are treated classically. Our main focus is on the dynamical exchange interaction between
two well-separated spins. This can be quantified by the transfer of excitations in the form of transverse spin
oscillations. We systematically study the effect of an electrostatic gate bias
V
g
on the interconnecting channel
and we map out the long-range dynamical spin transfer as a function of
V
g
. We identify regions of
V
g
giving rise
to significant amplification of the spin transmission at low frequencies and relate this to the electronic structure
of the channel
Sponsor
Grant Number
Science Foundation Ireland (SFI)
G20267
Author's Homepage:
http://people.tcd.ie/sanvitosDescription:
PUBLISHED
Author: SANVITO, STEFANO
Type of material:
Journal ArticleCollections
Series/Report no:
Physical Review B84
15
Availability:
Full text availableKeywords:
electrostatic gateSubject (TCD):
Nanoscience & MaterialsDOI:
http://dx.doi.org/10.1103/PhysRevB.84.155436Metadata
Show full item recordLicences: