Solvothermal Synthesis of Lateral Heterojunction Sb2Te3/Bi2Te3 Nanoplates

详细信息    查看全文

• 作者：Fucong Fei ; Zhongxia Wei ; Qianjin Wang ; Pengchao Lu ; Shuangbao Wang ; Yuyuan Qin ; Danfeng Pan ; Bo Zhao ; Xuefeng Wang ; Jian Sun ; Xinran Wang ; Peng Wang ; Jianguo Wan ; Jianfeng Zhou ; Min Han ; Fengqi Song ; Baigeng Wang ; Guanghou Wang
• 刊名：Nano Letters
• 出版年：2015
• 出版时间：September 9, 2015
• 年：2015
• 卷：15
• 期：9
• 页码：5905-5911
• 全文大小：401K
• ISSN：1530-6992

文摘

A 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. The semiconducting temperature-resistance curve and crossjunction rectification were observed, which reveal a staggered-gap lateral heterojunction with a small junction voltage. Quantum correction from the weak antilocalization reveals the well-maintained transport of the topological surface state. This is appealing for a platform for spin filters and one-dimensional topological interface states.