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Quantum anomalous Hall effect in Mn doped HgTe quantum wells

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arxiv 1706.05789 v1 pith:2K77NH2J submitted 2017-06-19 cond-mat.mes-hall

A. Budewitz , K. Bendias , P. Leubner , T. Khouri , S. Shamim , S. Wiedmann , H. Buhmann , L.W. Molenkamp This is my paper · ORCID
classification cond-mat.mes-hall
keywords quantumfieldhallmeasurementsanomalousbehaviordopedgate-voltage
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Magnetotransport measurements are presented on paramagnetic (Hg,Mn)Te quantum wells (QWs) with an inverted band structure. Gate-voltage controlled density dependent measurements reveal an unusual behavior in the transition regime from n- to p-type conductance: A very small magnetic field of approximately 70 mT is sufficient to induce a transition into the nu = -1 quantum Hall state, which extends up to at least 10 Tesla. The onset field value remains constant for a unexpectedly wide gate-voltage range. Based on temperature and angle-dependent magnetic field measurements we show that the unusual behavior results from the realization of the quantum anomalous Hall state in these magnetically doped QWs.

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  1. Topological Quantum Spin Hall Semimetals with Light

    cond-mat.mes-hall 2024-12 conditional novelty 4.0 of 10

    A spinful topological Fermi liquid with a Z2 invariant is proposed on a honeycomb lattice, and circularly polarized light is shown to probe its spin-resolved Chern numbers.

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