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Two-dimensional semimetal-insulator transition in HgTe-based quantum wells induced by a longitudinal magnetic field

Authors
Journal
JETP Letters
0021-3640
Publisher
Pleiades Publishing
Publication Date
Keywords
  • Excitonic Insulator
  • Electron-Systems
  • Hole System
  • Physics
  • Multidisciplinary
Disciplines
  • Physics

Abstract

A metal-insulator transition in a two-dimensional semimetal based on HgTe quantum wells is discovered. The transition is induced by a magnetic field applied parallel to the plane of the quantum well. The threshold behavior of the activation energy as a function of the magnetic-field strength and an abrupt reduction of the Hall resistance at the onset of the transition suggest that the observed effect originates from the formation of an excitonic insulator.

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