Publication Date:
2017-11-02
Description:
Author(s): A. Inhofer, S. Tchoumakov, B. A. Assaf, G. Fève, J. M. Berroir, V. Jouffrey, D. Carpentier, M. O. Goerbig, B. Plaçais, K. Bendias, D. M. Mahler, E. Bocquillon, R. Schlereth, C. Brüne, H. Buhmann, and L. W. Molenkamp A smooth heterojunction between a topological (left panel of figure) and a trivial (right panel) hosts not only chiral Dirac states but also massive Volkov-Pankratov states (VPSs). The authors show that VPSs behave in a relativistic manner in a strong electric field: not only are they populated in increasing chemical potential, but their energy is lowered in a Lorentz boost by the electric field thus enhancing their visibility. Signatures of this relativistic field effect are reported in HgTe/CdHgTe heterojunctions using high-frequency transport measurements. These include anomalous charge screening (Dirac screening), its breakdown at the VPS band edge, and evidence of multiple VPSs. [Phys. Rev. B 96, 195104] Published Wed Nov 01, 2017
Keywords:
Electronic structure and strongly correlated systems
Print ISSN:
1098-0121
Electronic ISSN:
1095-3795
Topics:
Physics
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