Proximity effects in a topological-insulator/Mott-insulator heterostructure
| Autor: | Ueda, Suguru, Kawakami, Norio, Sigrist, Manfred |
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| Rok vydání: | 2013 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.87.161108 |
| Popis: | We investigate proximity effects in a correlated heterostructure of a two-dimensional Mott insulator (MI) and a topological insulator (TI) by employing inhomogeneous dynamical mean-field theory. We show that the edge state of the TI induces strongly renormalized mid-gap states inside the MI region, which still have a remnant of the helical energy-spectrum. The penetration of low-energy electrons, which is controlled by the interface tunneling $V$, largely enhances the electron mass inside the MI and also splits a single Dirac-cone at edge sites into the spatially-separated two Dirac-cones in the strong $V$ region. Comment: 5 pages, 4 figures |
| Databáze: | arXiv |
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