Quantized large-bias current in the anomalous Floquet-Anderson insulator

TY - JOUR

T1 - Quantized large-bias current in the anomalous Floquet-Anderson insulator

AU - Kundu, Arijit

AU - Rudner, Mark

AU - Berg, Erez

AU - Lindner, Netanel H.

N1 - 5+ pages

PY - 2017/8/16

Y1 - 2017/8/16

N2 - We study two-terminal transport through two-dimensional periodically driven systems in which all bulk Floquet eigenstates are localized by disorder. We focus on the Anomalous Floquet-Anderson Insulator (AFAI) phase, a topologically-nontrivial phase within this class, which hosts topologically protected chiral edge modes coexisting with its fully localized bulk. We show that the unique properties of the AFAI yield remarkable far-from-equilibrium transport signatures: for a large bias between leads, a quantized amount of charge is transported through the system each driving period. Upon increasing the bias, the chiral Floquet edge mode connecting source to drain becomes fully occupied and the current rapidly approaches its quantized value.

AB - We study two-terminal transport through two-dimensional periodically driven systems in which all bulk Floquet eigenstates are localized by disorder. We focus on the Anomalous Floquet-Anderson Insulator (AFAI) phase, a topologically-nontrivial phase within this class, which hosts topologically protected chiral edge modes coexisting with its fully localized bulk. We show that the unique properties of the AFAI yield remarkable far-from-equilibrium transport signatures: for a large bias between leads, a quantized amount of charge is transported through the system each driving period. Upon increasing the bias, the chiral Floquet edge mode connecting source to drain becomes fully occupied and the current rapidly approaches its quantized value.

KW - cond-mat.mes-hall

M3 - Journal article

JO - arXiv.org

JF - arXiv.org

ER -