TY - JOUR
T1 - Spin and charge controlled by antisymmetric spin-orbit coupling in a triangular-triple-quantum-dot Kondo system
AU - Koga, M.
AU - Matsumoto, M.
AU - Kusunose, Hiroaki
PY - 2018/5/1
Y1 - 2018/5/1
N2 - We study a local antisymmetric spin-orbit (ASO) coupling effect on a triangular-triple-quantum-dot (TTQD) system as a theoretical proposal for a new application of the Kondo physics to nanoscale devices. The electric polarization induced by the Kondo effect is strongly correlated with the spin configurations and molecular orbital degrees of freedom in the TTQD. In particular, an abrupt sign reversal of the emergent electric polarization is associated with a quantum critical point in a magnetic field, which can also be controlled by the ASO coupling that changes the mixing weight of different orbital components in the TTQD ground state.
AB - We study a local antisymmetric spin-orbit (ASO) coupling effect on a triangular-triple-quantum-dot (TTQD) system as a theoretical proposal for a new application of the Kondo physics to nanoscale devices. The electric polarization induced by the Kondo effect is strongly correlated with the spin configurations and molecular orbital degrees of freedom in the TTQD. In particular, an abrupt sign reversal of the emergent electric polarization is associated with a quantum critical point in a magnetic field, which can also be controlled by the ASO coupling that changes the mixing weight of different orbital components in the TTQD ground state.
KW - Antisymmetric spin-orbit coupling
KW - Electric polarization
KW - Kondo effect
KW - Numerical renormalization group
KW - Quantum dot
UR - http://www.scopus.com/inward/record.url?scp=85027691602&partnerID=8YFLogxK
U2 - 10.1016/j.physb.2017.08.033
DO - 10.1016/j.physb.2017.08.033
M3 - Article
AN - SCOPUS:85027691602
VL - 536
SP - 226
EP - 229
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
ER -