TY - JOUR

T1 - Edge capacitance of a two-dimensional topological insulator

AU - Entin, M. V.

AU - Braginsky, L.

N1 - Publisher Copyright: © 2017 American Physical Society.

PY - 2017/9/1

Y1 - 2017/9/1

N2 - We study capacitance of the two-dimensional topological insulator (TI) edge states. The total capacitance is combined as a serial circuit of three capacitors presenting geometrical CG, quantum CQ, and correlation Ccorr contributions to the electron energy. If the Coulomb interaction is weak, they obey an inequality CG<CQ<Ccorr. Quantities CG and CQ are found in the case of a round TI dot. The quantum capacitance at the finite temperature is determined taking into account the edge states quantization with and without the magnetic field. We have concluded that, in the accepted approximations, Ccorr-1=0.

AB - We study capacitance of the two-dimensional topological insulator (TI) edge states. The total capacitance is combined as a serial circuit of three capacitors presenting geometrical CG, quantum CQ, and correlation Ccorr contributions to the electron energy. If the Coulomb interaction is weak, they obey an inequality CG<CQ<Ccorr. Quantities CG and CQ are found in the case of a round TI dot. The quantum capacitance at the finite temperature is determined taking into account the edge states quantization with and without the magnetic field. We have concluded that, in the accepted approximations, Ccorr-1=0.

UR - http://www.scopus.com/inward/record.url?scp=85030171971&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.96.115403

DO - 10.1103/PhysRevB.96.115403

M3 - Article

AN - SCOPUS:85030171971

VL - 96

JO - Physical Review B

JF - Physical Review B

SN - 2469-9950

IS - 11

M1 - 115403

ER -