Quantum spin pumping at fractionally quantized magnetization state for a system with competing exchange interactions
Strongly Correlated Electrons
2009-11-13 v1 Mesoscale and Nanoscale Physics
Abstract
We study the quantum spin pumping of an antiferromagnetic spin-1/2 chain with competing exchange interactions. We show that spatially periodic potential modulated in space and time acts as a quantum spin pump. In our model system, an applied electric field causes a spin gap to its critical ground state by introducing bond-alternation exchange interactions. We study quantum spin pumping at different quantized magnetization states and also explain physically the presence and absence of quantum spin pumping at different fractionally quantized magnetization states.
Cite
@article{arxiv.0803.2951,
title = {Quantum spin pumping at fractionally quantized magnetization state for a system with competing exchange interactions},
author = {Sujit Sarkar and C. D. Hu},
journal= {arXiv preprint arXiv:0803.2951},
year = {2009}
}