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Gate-tunable subband degeneracy in semiconductor nanowires.
Wang, Yuhao; Song, Wenyu; Cao, Zhan; Yu, Zehao; Yang, Shuai; Li, Zonglin; Gao, Yichun; Li, Ruidong; Chen, Fangting; Geng, Zuhan; Yang, Lining; Xu, Jiaye; Wang, Zhaoyu; Zhang, Shan; Feng, Xiao; Wang, Tiantian; Zang, Yunyi; Li, Lin; Shang, Runan; Xue, Qi-Kun; Liu, Dong E; He, Ke; Zhang, Hao.
Affiliation
  • Wang Y; Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University, 100084 Beijing, China.
  • Song W; Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University, 100084 Beijing, China.
  • Cao Z; Beijing Academy of Quantum Information Sciences, 100193 Beijing, China.
  • Yu Z; Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University, 100084 Beijing, China.
  • Yang S; Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University, 100084 Beijing, China.
  • Li Z; Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University, 100084 Beijing, China.
  • Gao Y; Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University, 100084 Beijing, China.
  • Li R; Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University, 100084 Beijing, China.
  • Chen F; Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University, 100084 Beijing, China.
  • Geng Z; Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University, 100084 Beijing, China.
  • Yang L; Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University, 100084 Beijing, China.
  • Xu J; Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University, 100084 Beijing, China.
  • Wang Z; Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University, 100084 Beijing, China.
  • Zhang S; Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University, 100084 Beijing, China.
  • Feng X; Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University, 100084 Beijing, China.
  • Wang T; Beijing Academy of Quantum Information Sciences, 100193 Beijing, China.
  • Zang Y; Frontier Science Center for Quantum Information, 100084 Beijing, China.
  • Li L; Hefei National Laboratory, 230088 Hefei, China.
  • Shang R; Beijing Academy of Quantum Information Sciences, 100193 Beijing, China.
  • Xue QK; Hefei National Laboratory, 230088 Hefei, China.
  • Liu DE; Beijing Academy of Quantum Information Sciences, 100193 Beijing, China.
  • He K; Hefei National Laboratory, 230088 Hefei, China.
  • Zhang H; Beijing Academy of Quantum Information Sciences, 100193 Beijing, China.
Proc Natl Acad Sci U S A ; 121(27): e2406884121, 2024 Jul 02.
Article in En | MEDLINE | ID: mdl-38935562
ABSTRACT
Degeneracy and symmetry have a profound relation in quantum systems. Here, we report gate-tunable subband degeneracy in PbTe nanowires with a nearly symmetric cross-sectional shape. The degeneracy is revealed in electron transport by the absence of a quantized plateau. Utilizing a dual gate design, we can apply an electric field to lift the degeneracy, reflected as emergence of the plateau. This degeneracy and its tunable lifting were challenging to observe in previous nanowire experiments, possibly due to disorder. Numerical simulations can qualitatively capture our observation, shedding light on device parameters for future applications.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Proc Natl Acad Sci U S A Year: 2024 Type: Article Affiliation country: China
Fulltext
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PubMed Links
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Proc Natl Acad Sci U S A Year: 2024 Type: Article Affiliation country: China