Magnetotransport properties of antimony nanowires
Abstract
The temperature dependence of the resistivity and the longitudinal and transverse magnetoresistance of antimony quantum wires with diameters ranging from 200 nm to 10 nm will be shown. The samples were prepared using the vapor-phase technique[1]. The temperature dependence of resistivity is characteristic of a metal. The magnetoresistance is quadratic at low magnetic field. At the value of the magnetic field where the cyclotron radius roughly corresponds to the wire radius, the longitudinal magnetoresistance turns over, as predicted by [2]. The magnetoresistance of the narrower wires below 4 K does show a step-like increase at the value of the magnetic field where the magnetic length equals the wire diameter, as was the case of bismuth wires[3]. This confirms that fact that the observation is independent of the effective mass, but dependent only on the geometry of the nanowires and the magnetic flux in the wire. 1. J. Heremans et al., Phys. Rev. B, in press 2. Chambers, Proc. Roy. Soc. London A 202 378 (1950) 3. J. Heremans et al., Phys. Rev. B 58, R10091 (1998)
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2000
- Bibcode:
- 2000APS..MARM28010H