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Anomalous magneto-transport properties in nearly gapless materials

✍ Scribed by M. Sasaki; A. Ohnishi; N. Satoh; K. Suga; K. Kindo; K. Inomata; H. Ebina; S.J. Lee

Publisher
Elsevier
Year
2010
Tongue
English
Weight
431 KB
Volume
3
Category
Article
ISSN
1875-3892

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✦ Synopsis

We have measured magnetoresistance (MR) for semimetals Bi and graphite, nearly gapless materials Bi-Sb and Bi-Te alloys, and narrow gap semiconductor Ag 2 Se single crystals at 4.2 K and up to 4 T. We have observed a giant MR for Bi, a giant linear MR (LMR) for Bi-Sb alloy and Ag 2 Se single crystals. Anomalous completely linear weak-field LMR has been found for nearly gapless materials: this is transferred into the ordinal MR or other LMR in relatively strong field range. It suggests the linear band dispersion in nearly gapless materials as proposed by Abrikosov.

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