CaltechAUTHORS
Published January 15, 2016 | Version Published
Journal Article Open

Observation of microwave induced resistance and photovoltage oscillations in MgZnO/ZnO heterostructures

Creators

  • 1. ROR icon Max Planck Institute for Solid State Research
  • 2. ROR icon Institute of Solid State Physics
  • 3. ROR icon University of Tokyo
  • 4. ROR icon Ioffe Institute
  • 5. ROR icon RIKEN Center for Emergent Matter Science
  • 6. ROR icon Tohoku University
  • 7. ROR icon Japan Science and Technology Agency

Abstract

Microwave induced resistance and photovoltage oscillations were investigated in Mg_xZn_(1−x)O/ZnO heterostructures. The physics of these oscillations is controlled significantly by scattering mechanisms, and therefore these experiments were motivated by the recently achieved high quality levels in this material and the apparent dominance of large angle, short-range scattering, which is distinct from the prevailing small angle scattering in state-of-the-art GaAs structures. Within the studied frequency range of 35–120 GHz, up to four oscillations were resolved at 1.4 K temperature, but only in high density samples. This allowed us to extract the value of the effective electron mass m^∗ = (0.35 ± 0.01)m₀, which is enhanced over the bare band mass, and estimate a local quantum scattering time of about 5 ps.

Additional Information

© 2016 American Physical Society. (Received 29 September 2015; published 15 January 2016) We gratefully acknowledge financial support from the Japan Society for the Promotion of Science through a Grant-in-Aid for Scientific Research(S) No. 24226002 and for Young Scientists (A) No. 23686008 as well as from the "Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST Program)" initiated by the Council for Science and Technology Policy (CSTP). A.V.S., Y.A.N., S.I.D., and I.V.K. thank the Russian Science Foundation (Grant No. 14-12-00599) for support in developing microwave measurements on ZnO heterostructures.

Attached Files

Published - PhysRevB.93.041410.pdf

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PhysRevB.93.041410.pdf

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Additional details

Identifiers

Eprint ID
102290
Resolver ID
CaltechAUTHORS:20200402-144733296

Funding

Japan Society for the Promotion of Science (JSPS)
24226002
Japan Society for the Promotion of Science (JSPS)
23686008
Council for Science and Technology Policy (CSTP)
Russian Science Foundation
14-12-00599

Dates

Created
2020-04-03
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Updated
2021-11-16
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