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Making massless dirac fermions from a patterned two-dimensional electron gas

Cited 144 time in Web of Science Cited 151 time in Scopus
Authors

Park, Cheol-Hwan; Louie, Steven G.

Issue Date
2009-05
Publisher
American Chemical Society
Citation
Nano Letters, Vol.9 No.5, pp.1793-1797
Abstract
Analysis of the electronic structure of an ordinary two-dimensional electron gas (2DEG) under an appropriate external periodic potential of hexagonal symmetry reveals that massless Dirac fermions are generated near the corners of the supercell Brillouin zone. The required potential parameters are found to be achievable under or close to laboratory conditions. Moreover, the group velocity is tunable by changing either the effective mass of the 2DEG or the lattice parameter of the external potential, and it is insensitive to the potential amplitude. The finding should provide a new class of systems other than graphene for investigating and exploiting massless Dirac fermions using 2DEGs in semiconductors. © 2009 American Chemical Society.
ISSN
1530-6984
URI
https://hdl.handle.net/10371/202376
DOI
https://doi.org/10.1021/nl803706c
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  • College of Natural Sciences
  • Department of Physics and Astronomy
Research Area Condensed Matter Physics, Nanoscale Photonics, Nanoscale Physics, 나노 물리와 나노 광자학, 응집 물질 물리

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