Kondo effect in the helical edge liquid of the quantum spin Hall state

Details Kondo effect in the helical edge liquid of the quantum spin Hall state Kondo effect in the helical edge liquid of the quantum spin Hall state

2009-01-12

arxiv.org/abs/0901.1685v3

Phys. Rev. Lett. 102, 256803 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 2 figures; version accepted for publication in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.102.256803

Following the recent observation of the quantum spin Hall (QSH) effect in HgTe quantum wells, an important issue is to understand the effect of impurities on transport in the QSH regime. Using linear response and renormalization group methods, we calculate the edge conductance of a QSH insulator as a function of temperature in the presence of a magnetic impurity. At high temperatures, Kondo and/or two-particle scattering give rise to a logarithmic temperature dependence. At low temperatures, for weak Coulomb interactions in the edge liquid the conductance is restored to unitarity with unusual power-laws characteristic of a `local helical liquid', while for strong interactions transport proceeds by weak tunneling through the impurity where only half an electron charge is transferred in each tunneling event.

Affiliated with

Also associated with

No associations

Rating

Kondo effect in the helical edge liquid of the quantum spin Hall state does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Kondo effect in the helical edge liquid of the quantum spin Hall state, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Kondo effect in the helical edge liquid of the quantum spin Hall state will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-71244