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26 April 2024 |
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Quantum Oscillations in Black Phosphorus Two-dimensional Electron Gas | | Likai Li
; Guo Jun Ye
; Vy Tran
; Ruixiang Fei
; Guorui Chen
; Huichao Wang
; Jian Wang
; Kenji Watanabe
; Takashi Taniguchi
; Li Yang
; Xian Hui Chen
; Yuanbo Zhang
; | | Date: |
24 Nov 2014 | | Abstract: | Two-dimensional electron gases (2DEG) have been an important source of
experimental discovery and conceptual development in condensed matter physics
for decades. When combined with the unique electronic properties of
two-dimensional (2D) crystals, rich new physical phenomena can be probed at the
quantum level. Here, we create a new 2DEG in black phosphorus, a recent member
of the two-dimensional atomic crystal family, using a gate electric field. We
achieve high carrier mobility in black phosphorus 2DEG by placing it on a
hexagonal boron nitride substrate (h-BN). This allows us, for the first time,
to observe quantum oscillations in this material. The temperature and magnetic
field dependence of the oscillations yields crucial information about the
system, such as cyclotron mass and lifetime of its charge carriers. Our
results, coupled with the fact that black phosphorus possesses anisotropic
energy bands with a tunable, direct bandgap, distinguishes black phosphorus
2DEG as a novel system with unique electronic and optoelectronic properties. | | Source: | arXiv, 1411.6572 | | Services: | Forum | Review | PDF | Favorites | |
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