1303.1896 (Yu-Li Lee et al.)

Electrically tunable two-channel Kondo fixed points in helical liquids    [PDF]

Yu-Li Lee, Yu-Wen Lee

We study a quantum dot coupled to two edge states of a quantum spin Hall insulator through electron tunnelings in the presence of a Rashba spin-orbital interaction induced by an external electric field. We show that if the electron interactions on the edge states are repulsive, there are two possible phases, depending on the Luttinger liquid parameter $K$. For $1/2View original: http://arxiv.org/abs/1303.1896