Dynamic Conductivity of Electrons and Electron-Phonon Interaction in Open Three-Well Nanostructures

• Authors: M. Tkach , Ju. Seti , Y. Grynyshyn , O. Voitsekhivska
• Languages of publication: EN

Abstracts

EN

The theoretical description of electronic tunneling transport through the three-well nanostructure (In_{0.53}Ga_{0.47}As/In_{0.52}Al_{0.48}As), being an expanded active region of quantum cascade detector, is presented. Using the solution of the Schrödinger equation, the dynamic conductivity caused by quantum transitions due to the interaction of electrons with electromagnetic field and phonons is calculated. Within the Green functions approach, the electron spectrum, renormalized due to the interaction with confined optical and interface phonons is obtained at cryogenic and room temperatures. The role of different mechanisms of electron-phonon interaction in the formation of temperature shifts, decay rates of electron states and electromagnetic field absorption bands is investigated. It is shown that independently of the temperature, the contribution produced by interface phonons into renormalized electron spectrum is several times bigger than that of confined phonons. However, the experimentally observed long-wave shift and broadening of absorption band at higher temperatures is, mainly, caused by the decreasing heights of resonant tunneling structure potential barriers.

Keywords

EN

63.20.Kd; 78.67.De; 72.10.Di

Discipline

• 78.67.De: Quantum wells
• 72.10.Di: Scattering by phonons, magnons, and other nonlocalized excitations(see also 71.45.-d Collective effects in electronic structure of bulk materials)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 128
• Issue: 3
• Pages: 343-352

Dates

published

2015-09

received

2015-02-24

(unknown)

2015-06-05

Contributors

author

M. Tkach

• Chernivtsi National University, Kotsiybynsky str. 2, 58012, Chernivtsi, Ukraine

author

Ju. Seti

• Chernivtsi National University, Kotsiybynsky str. 2, 58012, Chernivtsi, Ukraine

author

Y. Grynyshyn

• Chernivtsi National University, Kotsiybynsky str. 2, 58012, Chernivtsi, Ukraine

author

O. Voitsekhivska

• Chernivtsi National University, Kotsiybynsky str. 2, 58012, Chernivtsi, Ukraine

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Identifiers

DOI

10.12693/APhysPolA.128.343