Quantum oscillations in a two-dimensional electron gas at the rocksalt/zincblende interface of PbTe/CdTe (111) heterostructures
Abstract
Here, quantum oscillations are observed in the 2DEG system at the interface of novel heterostructures, PbTe/CdTe (111), with nearly identical lattice parameters (aPbTe = 0.6462 nm, aCdTe = 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.
- Authors:
-
- Zhejiang Univ., Zhejiang (China)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Univ. of North Carolina at Charlotte, Charlotte, NC (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)
- OSTI Identifier:
- 1235338
- Alternate Identifier(s):
- OSTI ID: 1321762
- Report Number(s):
- SAND-2015-7566J; LA-UR-15-24704
Journal ID: ISSN 1530-6984; 603526
- Grant/Contract Number:
- AC04-94AL85000; AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nano Letters
- Additional Journal Information:
- Journal Volume: 15; Journal Issue: 7; Journal ID: ISSN 1530-6984
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 77 NANOSCIENCE AND NANOTECHNOLOGY; PbTe/CdTe (111); 2DEG; quantum oscillations; Berry phase; topological insulator; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; high magnetic field science
Citation Formats
Zhang, Bingpo, Lu, Ping, Liu, Henan, Jiao, Lin, Ye, Zhenyu, Jaime, M., Balakirev, F. F., Yuan, Huiqiu, Wu, Huizhen, Pan, Wei, and Zhang, Yong. Quantum oscillations in a two-dimensional electron gas at the rocksalt/zincblende interface of PbTe/CdTe (111) heterostructures. United States: N. p., 2015.
Web. doi:10.1021/acs.nanolett.5b01605.
Zhang, Bingpo, Lu, Ping, Liu, Henan, Jiao, Lin, Ye, Zhenyu, Jaime, M., Balakirev, F. F., Yuan, Huiqiu, Wu, Huizhen, Pan, Wei, & Zhang, Yong. Quantum oscillations in a two-dimensional electron gas at the rocksalt/zincblende interface of PbTe/CdTe (111) heterostructures. United States. https://doi.org/10.1021/acs.nanolett.5b01605
Zhang, Bingpo, Lu, Ping, Liu, Henan, Jiao, Lin, Ye, Zhenyu, Jaime, M., Balakirev, F. F., Yuan, Huiqiu, Wu, Huizhen, Pan, Wei, and Zhang, Yong. Fri .
"Quantum oscillations in a two-dimensional electron gas at the rocksalt/zincblende interface of PbTe/CdTe (111) heterostructures". United States. https://doi.org/10.1021/acs.nanolett.5b01605. https://www.osti.gov/servlets/purl/1235338.
@article{osti_1235338,
title = {Quantum oscillations in a two-dimensional electron gas at the rocksalt/zincblende interface of PbTe/CdTe (111) heterostructures},
author = {Zhang, Bingpo and Lu, Ping and Liu, Henan and Jiao, Lin and Ye, Zhenyu and Jaime, M. and Balakirev, F. F. and Yuan, Huiqiu and Wu, Huizhen and Pan, Wei and Zhang, Yong},
abstractNote = {Here, quantum oscillations are observed in the 2DEG system at the interface of novel heterostructures, PbTe/CdTe (111), with nearly identical lattice parameters (aPbTe = 0.6462 nm, aCdTe = 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.},
doi = {10.1021/acs.nanolett.5b01605},
journal = {Nano Letters},
number = 7,
volume = 15,
place = {United States},
year = {Fri Jun 05 00:00:00 EDT 2015},
month = {Fri Jun 05 00:00:00 EDT 2015}
}
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Works referencing / citing this record:
Ultrahigh‐Detectivity Photodetectors with Van der Waals Epitaxial CdTe Single‐Crystalline Films
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Realization of a New Topological Crystalline Insulator and Lifshitz Transition in PbTe
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Electric‐Field Control of Dirac Two‐Dimensional Electron Gas in PbTe/CdTe Heterostructures
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