The Helical Liquid and the Edge of Quantum Spin Hall Systems

Details The Helical Liquid and the Edge of Quantum Spin Hall Systems The Helical Liquid and the Edge of Quantum Spin Hall Systems

2005-08-10

arxiv.org/abs/cond-mat/0508273v4

Phys. Rev. Lett. 96, 106401 (2006)

Physics

Condensed Matter

Other Condensed Matter

4 pages, accepted by Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.96.106401

The edge states of the recently proposed quantum spin Hall systems constitute a new symmetry class of one-dimensional liquids dubbed the ``helical liquid'', where the spin orientation is determined by the direction of electron motion. We prove a no-go theorem which states that a helical liquid with an odd number of components cannot be constructed in a purely 1D lattice system. In a helical liquid with an odd number of components, a uniform gap in the ground state can appear when the time-reversal (TR) symmetry is spontaneously broken by interactions. On the other hand, a correlated two-particle backscattering term by an impurity can become relevant while keeping the TR invariance. The Kondo effect in such a liquid exhibits new features in the structure of the screening cloud.

Affiliated with

Also associated with

No associations

Rating

The Helical Liquid and the Edge of Quantum Spin Hall Systems 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 The Helical Liquid and the Edge of Quantum Spin Hall Systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Helical Liquid and the Edge of Quantum Spin Hall Systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-277193