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Л. А. Конопко*,**, А. А. Николаева*,**, Т. Е. Хубер***
«Осцилляции Ааронова–Бома в монокристаллических нанонитях Bi.»
067–075 (2011)

PACS numbers: 72.60.+g, 73.20.-r, 73.21.Hb, 73.43.Qt, 73.63.Nm, 81.07.Gf, 85.35.Be

The results of magnetoresistance (MR) studies of single-crystal Bi nanowires with diameter of d???80 nm are presented. The single-crystal nanowire samples are prepared by means of the Tailor–Ulitovsky technique. Due to semimetal-to-semiconductor transition and high density of surface states with strong spin–orbit interaction, the charge carriers are confined to the conducting tube formed by surface states. The Aharonov–Bohm oscillations extracted from the longitudinal MR with two periods of ?B, which are proportional to h/e and h/2e, are observed. Manifestation of Berry phase is revealed in h/2e oscillations. However, even in the case of transverse magnetic field, there are equidistant oscillations of MR, and their period depends on the wire diameter, d, just as in the case of longitudinal MR. An interpretation of detected MR oscillations is presented.