Quantum Oscillations of Photoconductivity Relaxation in p–i–n GaAs/InAs/AlAs Heterodiodes
- Authors: Khanin Y.N.1, Vdovin E.E.1
-
Affiliations:
- Institute of Microelectronics Technology and High-Purity Materials
- Issue: Vol 52, No 6 (2018)
- Pages: 739-744
- Section: Semiconductor Structures, Low-Dimensional Systems, and Quantum Phenomena
- URL: https://journals.rcsi.science/1063-7826/article/view/203487
- DOI: https://doi.org/10.1134/S1063782618060088
- ID: 203487
Cite item
Abstract
The photoconductivity and its relaxation characteristics in tunneling p–i–n GaAs/AlAs heterostructures under pulsed illumination is studied. Quantum oscillations in the photoconductivity are detected depending on the bias voltage with the period independent of the light wavelength, as well as an oscillating component of the relaxation curves caused by modulation of the recombination rate at the edge of a triangular quantum well in the undoped i layer, as in the case of photoconductivity oscillations. The common nature of oscillations of the steady-state photoconductivity and relaxation curves under pulsed illumination is directly confirmed by the lack of an oscillating component in both types of dependences of some studied p–i–n heterostructures. Simultaneous suppression of the observed oscillations of dependences of both types as the temperature increases to 80 K also confirms the proposed mechanism of their formation. The dependences of these oscillations on the magnetic field and light flux power are studied. Oscillation-amplitude suppression in a magnetic field of ~2 T perpendicular to the current is caused by the effect of the Lorentz force on the ballistic motion of carriers in the triangular-quantum-well region.
About the authors
Yu. N. Khanin
Institute of Microelectronics Technology and High-Purity Materials
Email: vdov62@yandex.ru
Russian Federation, Chernogolovka, Moscow oblast, 142432
E. E. Vdovin
Institute of Microelectronics Technology and High-Purity Materials
Author for correspondence.
Email: vdov62@yandex.ru
Russian Federation, Chernogolovka, Moscow oblast, 142432