Dynamical screening function and plasmons in the wide HgTe quantum wells at high temperatures
Journal Title: Semiconductor Physics, Quantum Electronics and Optoelectronics - Year 2018, Vol 21, Issue 2
Abstract
The dynamical screening function of two-dimensional electron gas in a wide HgTe quantum well (QW) has been numerically modeled in this work. Calculations were performed in the Random Phase Approximation (RPA) framework and were based on the Lindhard equation. Our simulations directly incorporated non-parabolicity of bulk 2D carriers’ spectrum, which was obtained by full 8-band k.p method. Known from literature are the data that transport properties of HgTe QWs can be explained by graphene-like screening. We carried out the comparison of the screening function for the Schrödinger fermions in the inverted bands HgTe QW with the appropriate screening function for graphene monolayer with the Dirac fermions. In addition, the dependences of HgTe-specific screening function on temperature, scattering wave-vector and frequency have been studied with the purpose to ascertain the transport properties under high frequency radiation for the QW structures to be used as THz detectors. Plasmon frequencies of 2DEG in HgTe quantum well under study were calculated in the long-wave limit for T = 77 K.
Authors and Affiliations
E. O. Melezhik
Keywords
Related Articles
- EP ID EP416001
- DOI 10.15407/spqeo21.02.187
- Views 94
- Downloads 0
Electronic structure and optical properties of HgSe
We have performed the density functional theory calculations of mercury selenide compound using the plane-wave pseudo-potential (PWPP) method within the generalized gradient approximation to investigate the electronic st...
Peculiarities of photoluminescence spectra behavior in SiC crystals and films during phase transformations
Peculiarities of photoluminescence spectra behavior in SiC crystals and thin films with in-grown defects during phase transformations have been studied. On the deep-level(DL)-spectra, as an example, their characteristics...
Fluorescence of molecules placed near a spherical particle: Rabi splitting
Theoretical study of spontaneously emitted spectra of point-like source placed near spherical Ag particle was performed. It was shown that near-field electromagnetic interaction between a point-like emitter and spherical...
Polyvinylcarbazole films: Applications for chemical sensors
The adsorption properties of polyvinylcarbazole (PVC) films as sensitive layers of quartz crystal microbalance (QCM) sensors have been studied. Different organic vapors and complex mixture (a cologne) were tested as anal...
Electrical and optical parameters of Cu6PS5I-based thin films deposited using magnetron sputtering
Cu6PS5I-based thin films were deposited onto silicate glass substrates by non-reactive radio-frequency magnetron sputtering. The chemical composition of thin films was determined using energy-dispersive X-ray spectroscop...