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Title: Optical probing of MgZnO/ZnO heterointerface confinement potential energy levels

Low-temperature photoluminescence and reflectance measurements were employed to study the optical transitions present in two-dimensional electron systems confined at Mg{sub x}Zn{sub 1–x}O/ZnO heterojunctions. Transitions involving A- and B-holes and electrons from the two lowest subbands formed within the confinement potential are detected. In the studied density range of 2.0–6.5 × 10{sup 11 }cm{sup −2}, the inter-subband splitting is measured and the first excited electron subband is shown to be empty of electrons.
Authors:
; ;  [1] ;  [2] ; ;  [3] ; ;  [4] ;  [5] ;  [6] ;  [7] ;  [3] ;  [8]
  1. Institute of Solid State Physics, RAS, Chernogolovka 142432 (Russian Federation)
  2. (Germany)
  3. Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), University of Tokyo, Tokyo 113-8656 (Japan)
  4. Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart (Germany)
  5. RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198 (Japan)
  6. Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan)
  7. (JST), Tokyo 102-0075 (Japan)
  8. (CEMS), Wako 351-0198 (Japan)
Publication Date:
OSTI Identifier:
22412692
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 8; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ELECTRONIC STRUCTURE; ELECTRONS; HETEROJUNCTIONS; HOLES; PHOTOLUMINESCENCE; POTENTIAL ENERGY; POTENTIALS; SPECTRAL REFLECTANCE; TEMPERATURE DEPENDENCE; TWO-DIMENSIONAL SYSTEMS; ZINC OXIDES