Superconductivity and quantum oscillations in crystalline Bi nanowire.

Onset of superconductivity in 2D granular films composed of Bi clusters

Two dimensional films comprising of Bi clusters ranging in size from 25 to 100 Å show an influence of the underlying matrix on normal state resistivity and the superconducting transition temperature Tc. This is in contrast to crystalline Bi. Quantum size effects are observed by changing the deposition temperature, which determines cluster size. These observations can be attributed to supercondu...

Surface superconductivity in thin cylindrical Bi nanowire.

The physical origin and the nature of superconductivity in nanostructured Bi remains puzzling. Here, we report transport measurements of individual cylindrical single-crystal Bi nanowires, 20 and 32 nm in diameter. In contrast to nonsuperconducting Bi nanoribbons with two flat surfaces, cylindrical Bi nanowires show superconductivity below 1.3 K. However, their superconducting critical magnetic...

Weak antilocalization and conductance fluctuation in a single crystalline Bi nanowire

Diameter-dependent thermoelectric figure of merit in single-crystalline Bi nanowires.

The diameter-dependent thermoelectric properties of individual single-crystalline Bi nanowires grown by the on-film formation of nanowires method have been investigated. The electrical resistivity, Seebeck coefficient, and thermal conductivity were measured as functions of the nanowire diameter using an individual nanowire device. The thermoelectric figure of merit (ZT) calculated from the meas...

Synthesis and Quantum Transport Properties of Bi2Se3 Topological Insulator Nanostructures

Bi₂Se₃ nanocrystals with various morphologies, including nanotower, nanoplate, nanoflake, nanobeam and nanowire, have been synthesized. Well-distinguished Shubnikov-de Haas (SdH) oscillations were observed in Bi₂Se₃ nanoplates and nanobeams. Careful analysis of the SdH oscillations suggests the existence of Berry's phase π, which confirms the quantum transport of the surface Dirac fermions in b...