Can I read Topological Charge Pumping in Excitonic Insulators on EtoBox?

Topological Charge Pumping in Excitonic Insulators by Sun, Zhiyuan; Millis, Andrew J. is a scholarly article available to read on EtoBox.

What is Topological Charge Pumping in Excitonic Insulators about?

We show that in excitonic insulators with $s$-wave electron-hole pairing, an applied electric field (either pulsed or static) can induce a $p$-wave component to the order parameter, and further drive it to rotate in the $s+ip$ plane, realizing a Thouless charge pump. In one dimension, each cycle of rotation pumps exactly two electrons across the sample. Higher dimensional systems can be viewed as a stack of one dimensional chains in momentum space in which each chain crossing the fermi surface contributes a channel of charge pumping. Physics beyond the adiabatic limit, including in particular dissipative effects is discussed.

Author

Sun, Zhiyuan; Millis, Andrew J.

Published

2020

Language

EN