AC Response of the Edge States in a Two-Dimensional Topological Insulator Coupled to a Conducting Puddle

Abstract

We calculate an AC response of the edge states of a two-dimensional topological insulator, which can exchange electrons with a conducting puddle in the bulk of the insulator. This exchange leads to finite corrections to the response of isolated edge states both at low and high frequencies. By comparing these corrections, one may determine the parameters of the puddle.

4 pages, 3 figures

References in corpus (5)

• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Nonlocal edge state transport in the quantum spin Hall state
• Kondo effect in the helical edge liquid of the quantum spin Hall state
• Conductance of a helical edge liquid coupled to a magnetic impurity
• Helical edge states coupled to a spin bath: Current-induced magnetization

Cited by in corpus (1)

• Sub- to Super-Poissonian crossover of current noise in helical edge states coupled to a spin impurity in a magnetic field