  Single-crystalline \beta-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 \b{eta}-Ag2Se is caused by
strong spin-orbit coupling and Ag-Se bonding hybridization. These extensive
investigations provide new meaningful information about silver-chalcogenide TIs
that have anisotropic Dirac cones, which could be useful for spintronics
applications.
