Negative polarizability of 2D electrons in HgTe quantum well

Abstract

The polarizability of electrons occupying the lowest subband of spatial quantization in CdTe/Cd${}_x$Hg${}_{1-x}$Te/CdTe quantum wells is calculated. It is shown that polarizability in the quantum well without cadmium is negative, i.e., the displacement of an electron in an electric field applied perpendicularly to the quantum well plane is opposite to the force acting on it. The negative polarizability of 2D electrons can reduce the dielectric constant of quantum wells by up to $(10-15)$ percent.

4 pages, 4 figures

References in corpus (4)

• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• Topological Phases in Two-Dimensional Materials: A Brief Review
• The valence band energy spectrum of HgTe quantum wells with inverted band structures
• Landau level spectroscopy of valence bands in HgTe quantum wells: Effects of symmetry lowering

Cited by in corpus (1)

• Transformation of an energy spectrum and wave functions in the crossover from two- to three-dimensional topological insulator in HgTe quantum wells: long and thorny way