Interfacial and bulk polaron masses in Zn<inf>1-</inf><inf>x</inf>Mg<inf>x</inf>O/ZnO heterostructures examined by terahertz time-domain cyclotron spectroscopy
Loading...
Date
Authors
Lloyd-Hughes, J
Failla, M
Ye, Jiandong
Jones, S P P
Teo, Kie Leong
Jagadish, Chennupati
Journal Title
Journal ISSN
Volume Title
Publisher
American Institute of Physics (AIP)
Abstract
The cyclotron resonance of polarons in Zn<inf>1-</inf><inf>x</inf>Mg<inf>x</inf>O/ZnO heterostructures (with 0.15 < x < 0.22) was studied by terahertz time-domain spectroscopy. Low-temperature magnetoconductivity spectra of the 2D electron gas at the Zn<inf>1-</inf><inf>x</inf>Mg<inf>x</inf>O/ZnO interface determined the polaron density, mass, and scattering rate. The cyclotron mass of 2D polarons was found to increase significantly with magnetic field B from 0.24 m<inf>e</inf> at B = 2 T to 0.37 m<inf>e</inf> at B = 7.5 T. A nonlinear cyclotron frequency with B was also observed for 3D polarons in ZnO. The findings are discussed in the context of polaron mass renormalization driven by the electron-LO-phonon and electron-acoustic phonon interactions.
Description
Keywords
Citation
Collections
Source
Applied Physics Letters
Type
Book Title
Entity type
Access Statement
Open Access