Friday, July 12, 2013

1307.3022 (Wenhong Wang et al.)

Large Linear Magnetoresistance and Shubnikov-de Hass Oscillations in
Single Crystals of YPdBi Heusler Topological Insulators

Wenhong Wang, Yin Du, Guizhou Xu, Xiaoming Zhang, Enke Liu, Zhongyuan Liu, Youguo Shi, Jinglan Chen, Guangheng Wu, Xixiang Zhang
We report the observation of a large linear magnetoresistance (MR) and Shubnikov-de Hass (SdH) quantum oscillations in single crystals of YPdBi Heusler topological insulators. Owning to the successfully obtained the high-quality YPdBi single crystals, large non-saturating linear MR of as high as 350% at 5K and over 120% at 300 K under a moderate magnetic field of 7 T is observed. In addition to the large, field-linear MR, the samples exhibit pronounced SdH quantum oscillations at low temperature. Analysis of the SdH data manifests that the high-mobility bulk electron carriers dominate the magnetotransport and are responsible for the observed large linear MR in YPdBi crystals. These findings imply that the Heusler-based topological insulators have superiorities for investigating the novel quantum transport properties and developing the potential applications.
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