nn5b07368_si_001.pdf (1.08 MB)
Quantum Electronic Transport of Topological Surface States in β‑Ag2Se Nanowire
journal contribution
posted on 2016-03-28, 00:00 authored by Jihwan Kim, Ahreum Hwang, Sang-Hoon Lee, Seung-Hoon Jhi, Sunghun Lee, Yun Chang Park, Si-in Kim, Hong-Seok Kim, Yong-Joo Doh, Jinhee Kim, Bongsoo KimSingle-crystalline β-Ag2Se nanostructures, a new
class of 3D topological insulators (TIs), were synthesized using the
chemical vapor transport method. The topological surface states were
verified by measuring electronic transport properties including the
weak antilocalization effect, Aharonov–Bohm oscillations, and
Shubnikov–de Haas oscillations. First-principles band calculations
revealed that the band inversion in β-Ag2Se is caused
by strong spin–orbit coupling and Ag–Se bonding hybridization.
These investigations provide evidence of nontrivial surface state
about β-Ag2Se TIs that have anisotropic Dirac cones.