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Electric‐Field Control of Dirac Two‐Dimensional Electron Gas in PbTe/CdTe Heterostructures
Author(s) -
Zhang Le,
Shu Tianyu,
Wu Huizhen,
Ye Zhizhen,
Zhu Liping
Publication year - 2019
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201800551
Subject(s) - heterojunction , cadmium telluride photovoltaics , electric field , electron , fermi gas , condensed matter physics , materials science , physics , optoelectronics , quantum mechanics
Two‐dimensional electron gases (2DEGs) confined to quantum wells trigger rich emergent phenomena and serve as a host for high‐speed electronics. 2DEG in PbTe/CdTe heterostructure was predicted to be Dirac electrons and confirmed by recent experiments. Here, we demonstrate the manipulation of electrical transport properties of this 2DEG with extremely high mobility and unique electron structure by ionic liquid‐gating. The extreme capacitance of carrier modulation enables to tune the band structure. With a change of the gate voltage, the Fermi level moves to the conduction band and crosses the Dirac Point, leading to the shift of quantum oscillation. Our results may offer new insight toward electronic application with on‐demand properties.