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진호섭

Jin, Hosub
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Interfacial Dirac Cones from Alternating Topological Invariant Superlattice Structures of Bi2Se3

Author(s)
Song, Jung-HwanJin, HosubFreeman, Arthur J
Issued Date
2010-08
DOI
10.1103/PhysRevLett.105.096403
URI
https://scholarworks.unist.ac.kr/handle/201301/13411
Fulltext
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.105.096403
Citation
PHYSICAL REVIEW LETTERS, v.105, pp.096403
Abstract
When the three-dimensional topological insulators Bi2Se3 and Bi2Te3 have an interface with vacuum, i.e., a surface, they show remarkable features such as topologically protected and spin-momentum locked surface states. However, for practical applications, one often requires multiple interfaces or channels rather than a single surface. Here, for the first time, we show that an interfacial and ideal Dirac cone is realized by alternating band and topological insulators. The multichannel Dirac fermions from the superlattice structures open a new way for applications such as thermoelectric and spintronics devices. Indeed, utilizing the interfacial Dirac fermions, we also demonstrate the possible power factor improvement for thermoelectric applications.
Publisher
AMER PHYSICAL SOC
ISSN
0031-9007

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