Details

Autor(en) / Beteiligte

• Kadvkov, A.M.
• Krishtopenko, S.S.
• Jouault, B.
• Desrat, W.
• Marcinkiewicz, M.
• Ruffenach, S.
• Consejo, C.
• Torres, J.
• Morozov, S.V.
• Gavrilenko, V.I.
• Mikhailov, N.N.
• Dvoretskii, S.A.
• Knap, W.
• Teppe, F.

Titel

Spectroscopy of Temperature-Driven Single Valley Dirac Fermions in HgTe/CdHgTe Quantum Wells

Ist Teil von

• 2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2018, p.1-2

Ort / Verlag

IEEE

Erscheinungsjahr

2018

Quelle

IEEE/IET Electronic Library (IEL)

Beschreibungen/Notizen

• We report on the temperature-dependent magneto-absorption and magnetotransport spectroscopy of HgTe/CdHgTe quantum wells above the critical well thickness d c . Our results, obtained in magnetic fields up to 16 T and temperature range from 1.7 to 150 K, clearly indicate a change in the band-gap energy with temperature. A topological phase transition between quantum spin Hall and trivial insulator states, revealing appearance of single-valley Dirac fermions at T= 27 and 90 K for 6.5 and 8 nm QWs respectively, was clearly observed in our magnetospectroscopy measurements.