dc.contributor.author | Fu, Liang | |
dc.contributor.author | Tang, Evelyn May Yin | |
dc.date.accessioned | 2015-08-07T13:44:02Z | |
dc.date.available | 2015-08-07T13:44:02Z | |
dc.date.issued | 2014-11 | |
dc.date.submitted | 2014-03 | |
dc.identifier.issn | 1745-2473 | |
dc.identifier.issn | 1745-2481 | |
dc.identifier.uri | http://hdl.handle.net/1721.1/98054 | |
dc.description.abstract | Topological crystalline insulators in IV–VI compounds host novel topological surface states consisting of multi-valley massless Dirac fermions at low energy. Here we show that strain generically acts as an effective gauge field on these Dirac fermions and creates pseudo-Landau orbitals without breaking time-reversal symmetry. We predict the realization of this phenomenon in IV–VI semiconductor heterostructures, due to a naturally occurring misfit dislocation array at the interface that produces a periodically varying strain field. Remarkably, the zero-energy Landau orbitals form a flat band in the vicinity of the Dirac point, and coexist with a network of snake states at higher energy. We propose that the high density of states of this flat band gives rise to interface superconductivity observed in IV–VI semiconductor multilayers at unusually high temperatures, with non-Bardeen–Cooper–Schrieffer behaviour. Our work demonstrates a new route to altering macroscopic electronic properties to achieve a partially flat band, and provides a starting point for realizing novel correlated states of matter. | en_US |
dc.description.sponsorship | United States. Dept. of Energy. Division of Materials Sciences and Engineering (Award DE-SC0010526) | en_US |
dc.description.sponsorship | National Science Foundation (U.S.) (Grant DMR-1005541) | en_US |
dc.description.sponsorship | National Natural Science Foundation (China) (Grant 11074140) | en_US |
dc.description.sponsorship | National Natural Science Foundation (China) (Grant 11274192) | en_US |
dc.language.iso | en_US | |
dc.publisher | Nature Publishing Group | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1038/nphys3109 | en_US |
dc.rights | Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. | en_US |
dc.source | arXiv | en_US |
dc.title | Strain-induced partially flat band, helical snake states and interface superconductivity in topological crystalline insulators | en_US |
dc.type | Article | en_US |
dc.identifier.citation | Tang, Evelyn, and Liang Fu. “Strain-Induced Partially Flat Band, Helical Snake States and Interface Superconductivity in Topological Crystalline Insulators.” Nature Physics 10, no. 12 (November 2, 2014): 964–969. | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Department of Physics | en_US |
dc.contributor.mitauthor | Tang, Evelyn May Yin | en_US |
dc.contributor.mitauthor | Fu, Liang | en_US |
dc.relation.journal | Nature Physics | en_US |
dc.eprint.version | Original manuscript | en_US |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
dspace.orderedauthors | Tang, Evelyn; Fu, Liang | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-8803-1017 | |
dc.identifier.orcid | https://orcid.org/0000-0002-9366-7925 | |
mit.license | PUBLISHER_POLICY | en_US |
mit.metadata.status | Complete | |