38 research outputs found
Spin Current Generated from A Quantum Dot Driven by Pulsed Magnetic Resonance : Real-Time Spin Dynamics
Spin Pumping from Rashba Spin-Orbit-Coupled Electron Systems Driven by Electric Dipole Spin Resonance
Spin pumping from finite-sized electron systems in ballistic and diffusive transport regimes
Spin-Current-Driven Spin Pumping in Rashba Spin-Orbit Coupled Systems : A Spin Torque Effect
Kondo effect on adiabatic spin pumping from a quantum dot driven by a rotating magnetic field
Spin separation and spin Hall effect in quantum wires due to lateral-confinement-induced spin-orbit-coupling
Energy polarization and energy pumping in Rice-Mele chains
The one-dimensional Rice-Mele lattice consisting of two-site unit cells
enables topological charge pumping at low enough temperatures. We show here
that energy pumping is feasible in this system. We analyze energy polarization
using the second-quantization formalism and connect it to intercell energy
current by the relevant continuity equation. Following this formulation, we
numerically evaluate the energy current pumped in an adiabatic cycle when the
system parameters vary periodically and slowly with time. Unlike the pumped
charge, the pumped energy is entirely temperature-independent. The global Berry
phase for all bands and the related topological phase transitions during the
pumping cycle account for the energy pumping. The present study paves the way
for manipulating energy current without electric and thermal biases.Comment: 6 pages, 4 figure