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Giant photocurrents in a Dirac fermion system at cyclotron resonance

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Olbrich, P. ; Zoth, C. ; Vierling, P. ; Dantscher, K.-M. ; Budkin, G. V. ; Tarasenko, S. A. ; Bel'kov, V. V. ; Kozlov, D. A. ; Kvon, Z. D. ; Mikhailov, N. N. ; Dvoretsky, S. A. ; Ganichev, Sergey
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Date of publication of this fulltext: 05 Dec 2016 14:39


We report on the observation of the giant photocurrents in HgTe/HgCdTe quantum well (QW) of critical thickness at which a Dirac spectrum emerges. At an exciting QW of 6.6 nm width by terahertz (THz) radiation and sweeping magnetic field we detected a resonant photocurrent. Remarkably, the position of the resonance can be tuned from negative (−0.4 T) to positive (up to 1.2 T) magnetic fields by ...


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