Disorder induced quantized conductance with fractional value and universal conductance fluctuation in three-dimensional topological insulators

Details Disorder induced quantized conductance with fractional value and universal conductance fluctuation in three-dimensional topological insulators Disorder induced quantized conductance with fractional value and universal conductance fluctuation in three-dimensional topological insulators

2011-10-18

arxiv.org/abs/1110.3883v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We report a theoretical investigation on the conductance and its fluctuation of three-dimensional topological insulators (3D TI) in $Bi_2Se_3$ and $Sb_2Te_3$ in the presence of disorders. Extensive numerical simulations are carried out. We find that in the diffusive regime the conductance is quantized with fractional value. Importantly, the conductance fluctuation is also quantized with a universal value. For 3D TI connected by two terminals, three independent conductances $G_{zz}$, $G_{xx}$ and $G_{zx}$ are identified where z is the normal direction of quintuple layer of 3D TI (see inset of Fig.1). The quantized conductance are found to be $=1$, $=4/3$ and $=6/5$ with corresponding quantized conductance fluctuation 0.54, 0.47, and 0.50. The quantization of average conductance and its fluctuation can be understood by theory of mode mixing. The experimental realization that can observe the quantization of average conductance is discussed.

Affiliated with

Also associated with

No associations

Rating

Disorder induced quantized conductance with fractional value and universal conductance fluctuation in three-dimensional topological insulators 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 Disorder induced quantized conductance with fractional value and universal conductance fluctuation in three-dimensional topological insulators, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disorder induced quantized conductance with fractional value and universal conductance fluctuation in three-dimensional topological insulators will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-290138