Temperature-dependent magnetospectroscopy of HgTe quantum wells

Abstract

We report on magnetospectroscopy of HgTe quantum wells in magnetic fields up to 45 T in temperature range from 4.2 K up to 185 K. We observe intra- and inter-band transitions from zero-mode Landau levels, which split from the bottom conduction and upper valence subbands, and merge under the applied magnetic field. To describe experimental results, realistic temperature-dependent calculations of Landau levels have been performed. We show that although our samples are topological insulators at low temperatures only, the signature of such phase persists in optical transitions at high temperatures and high magnetic fields. Our results demonstrate that temperature-dependent magnetospectroscopy is a powerful tool to discriminate trivial and topological insulator phases in HgTe quantum wells.

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Cited by in corpus (11)

• Pressure and temperature driven phase transitions in HgTe quantum wells
• Temperature-driven single-valley Dirac fermions in HgTe quantum wells
• Topological insulators based on HgTe
• Massless Dirac fermions in III-V semiconductor quantum wells
• Band Structure of Two-dimensional Dirac Semimetal from Cyclotron Resonance
• Avoided level crossing at the magnetic field induced topological phase transition due to spin-orbital mixing
• Many-particle effects in optical transitions from zero-mode Landau levels in HgTe quantum wells
• Disorder-induced phase transitions in double HgTe quantum wells
• Quasiparticle picture of topological phase transitions induced by interactions
• Many-particle hybridization of optical transitions from zero-mode Landau levels in HgTe quantum wells
• Large inverted band-gap in strained three-layer InAs/GaInSb quantum wells