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29 March 2024
 
  » arxiv » 1503.0390

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Lateral Heterojunction Sb2Te3/Bi2Te3 and its topological transport
Fucong Fei ; Qianjin Wang ; Zhongxia Wei ; Rui Wang ; Danfeng Pan ; Bo Zhao ; Xuefeng Wang ; Xinran Wang ; Fengqi Song ; Baigeng Wang ; Jianguo Wan ; Guanghou Wang ;
Date 2 Mar 2015
AbstractA lateral heterojunction of topological insulator Sb2Te3/Bi2Te3 was successfully synthesized using a two-step solvothermal method. The two crystalline components were separated well by a sharp lattice-matched interface when the optimized procedure was used. Inspecting the heterojunction using high-resolution transmission electron microscopy showed that epitaxial growth occurred along the horizontal plane. A rectification curve was observed at low temperatures. Quantum correction from the weak antilocalization reveals the transport of the topological surface state. There was, therefore, a staggered-gap lateral heterojunction with a small junction voltage, which is appealing for a platform for spin filters and one-dimensional topological interface states.
Source arXiv, 1503.0390
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