Activated Transport in Magnetic-Field Induced Insulating Phase in Two-Dimensional Electron Gas in InGaAs/InP Heterostructures |
| B. Pődör, G. Gombos Research Institute for Technical Physics of the Hungarian Academy of Sciences Budapest, Hungary G. Reményi CNRS Centre de Recherche sur les Tres Basses Températures et Laboratoire des Champs Magnétiques Intenses, Grenoble, France Gy. Kovács Applied Physics Research Group, Department of General Physics, Loránd Eötvös University, Budapest, Hungary I.G. Savel'ev and S.V. Novikov Ioffe Physical-Technical Institute of the Russian Academy of Sciences, St. Petersburg, Russia |
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| We report on experiments on low temperature (millikelvin range) activated magnetotransport on low-density two-dimensional electron systems in InGaAs/InP for Landau level filling factors 0.25 ≤ ν ≤ 0.55. The activation energy increases approximately linearly with decreasing filling factor. The observations are discussed in the light of the formation of the Wigner solid. |
| DOI: 10.12693/APhysPolA.92.945 PACS numbers: 73.20.Dx |