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Quantum Oscillations in a Two-Dimensional Electron Gas at the Rocksalt/Zincblende Interface of PbTe/CdTe (111) Heterostructures.
Zhang, Bingpo; Lu, Ping; Liu, Henan; Jiao, Lin; Ye, Zhenyu; Jaime, M; Balakirev, F F; Yuan, Huiqiu; Wu, Huizhen; Pan, Wei; Zhang, Yong.
Afiliación
  • Zhang B; †Department of Physics, State Key Laboratory for Silicon Materials, and Center for Correlated Matter, Zhejiang University, Hangzhou, Zhejiang, 310027, People's Republic of China.
  • Lu P; ‡Sandia National Laboratories, Albuquerque, New Mexico 87185, United States.
  • Liu H; §Department of Electrical Engineering, Optoelectronics Center, University of North Carolina at Charlotte, Charlotte, North Carolina 28223, United States.
  • Jiao L; †Department of Physics, State Key Laboratory for Silicon Materials, and Center for Correlated Matter, Zhejiang University, Hangzhou, Zhejiang, 310027, People's Republic of China.
  • Ye Z; †Department of Physics, State Key Laboratory for Silicon Materials, and Center for Correlated Matter, Zhejiang University, Hangzhou, Zhejiang, 310027, People's Republic of China.
  • Jaime M; ∥NHMFL, Los Alamos National Lab, Los Alamos, New Mexico 87545, United States.
  • Balakirev FF; ∥NHMFL, Los Alamos National Lab, Los Alamos, New Mexico 87545, United States.
  • Yuan H; †Department of Physics, State Key Laboratory for Silicon Materials, and Center for Correlated Matter, Zhejiang University, Hangzhou, Zhejiang, 310027, People's Republic of China.
  • Wu H; †Department of Physics, State Key Laboratory for Silicon Materials, and Center for Correlated Matter, Zhejiang University, Hangzhou, Zhejiang, 310027, People's Republic of China.
  • Pan W; ‡Sandia National Laboratories, Albuquerque, New Mexico 87185, United States.
  • Zhang Y; §Department of Electrical Engineering, Optoelectronics Center, University of North Carolina at Charlotte, Charlotte, North Carolina 28223, United States.
Nano Lett ; 15(7): 4381-6, 2015 Jul 08.
Article en En | MEDLINE | ID: mdl-26046294
Quantum oscillations are observed in the 2DEG system at the interface of novel heterostructures, PbTe/CdTe (111), with nearly identical lattice parameters (a(PbTe) = 0.6462 nm, a(CdTe) = 0.648 nm) but very different lattice structures (PbTe: rock salt, CdTe: zinc blende). The 2DEG formation mechanism, a mismatch in the bonding configurations of the valence electrons at the interface, is uniquely different from the other known 2DEG systems. The aberration-corrected scanning transmission electron microscope (AC-STEM) characterization indicates an abrupt interface without cation interdiffusion due to a large miscibility gap between the two constituent materials. Electronic transport measurements under magnetic field up to 60 T, with the observation of Landau level filling factor ν = 1, unambiguously reveal a π Berry phase, suggesting the Dirac Fermion nature of the 2DEG at the heterostructure interface, and the PbTe/CdTe heterostructure being a new candidate for 2D topological crystalline insulators.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nano Lett Año: 2015 Tipo del documento: Article Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nano Lett Año: 2015 Tipo del documento: Article Pais de publicación: Estados Unidos