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Observation of plasma and magnetoplasma resonances of two-dimensional electrons in a single MgZnO/ZnO heterojunction

Abstract

The magnetoluminescence of the two-dimensional electron system in a single Mg x Zn1 − x O/ZnO hetero-junction (x = 0.02) at a temperature of 0.3 K in magnetic fields up to 14 T has been studied. The concentration of two-dimensional electrons in the structure under study has been determined from the oscillations of the luminescence intensity as a function of the magnetic field. The value thus obtained is close to the one derived from transport measurements. The resonance corresponding to plasma excitations of two-dimensional electrons has been observed using optical detection of microwave absorption. In a magnetic field, the lower branch of magnetoplasma excitations, which corresponds to the propagation of edge magnetoplasmons in a structure with nearly square geometry, has been observed and investigated.

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Original Russian Text © V.E. Kozlov, A.B. Van’kov, S.I. Gubarev, I.V. Kukushkin, J. Falson, D. Maryenko, Y. Kozuka, A. Tsukazaki, M. Kawasaki, J.H. Smet, 2013, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2013, Vol. 98, No. 4, pp. 251–254.

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Kozlov, V.E., Van’kov, A.B., Gubarev, S.I. et al. Observation of plasma and magnetoplasma resonances of two-dimensional electrons in a single MgZnO/ZnO heterojunction. Jetp Lett. 98, 223–226 (2013). https://doi.org/10.1134/S0021364013170074

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  • DOI: https://doi.org/10.1134/S0021364013170074

Keywords

  • JETP Letter
  • Microwave Absorption
  • Magnetic Field Dependence
  • Dimensional Electron
  • Plasma Excitation