Synthesis and magnetotransport properties of Bi2Se3 nanowires

• 来源期刊: 中国物理B（英文版）
• 关键词: topological insulators nanowires chemical vapor deposition Aharonov-Bohm effect
• 年，卷（期）: 2017,（9）
• 页码范围: 324-328
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/1674-1056/26/9/096101

摘要

Bi2Se3,as a three-dimensional topological insulator,has attracted worldwide attention for its unique surface states which are protected by time-reversal symmetry.Here we report the synthesis and characterization of high-quality singlecrystalline Bi2Se3 nanowires.Bi2Se3 nanowires were synthesized by chemical vapor deposition (CVD) method via goldcatalyzed vapor-liquid-solid (VLS) mechanism.The structure and morphology were characterized by scanning electron microscopy (SEM),transmission electron microscopy (TEM),x-ray photoelectron spectroscopy (XPS),and Raman spectroscopy.In magnetotransport measurements,the Aharonov-Bohm (AB) effect was observed in a nanowire-based nanodevice,suggesting the existence of surface states in Bi2Se3 nanowires.