Band dependence of charge density wave in quasi-one-dimensional Ta2NiSe7 probed by orbital magnetoresistance

Jiaming He, Yiran Zhang, Libin Wen, Yusen Yang, Jinyu Liu, Yueshen Wu, Hailong Lian, Hui Xing, Shun Wang, Zhiqiang Mao, Ying Liu

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Abstract

Ta2NiSe7 is a quasi-one-dimensional (quasi-1D) transition-metal chalcogenide with Ta and Ni chain structures. An incommensurate charge-density wave (CDW) in this quasi-1D structure was well studied previously using tunnelling spectrum, X-ray, and electron diffraction, whereas its transport property and the relation to the underlying electronic states remain to be explored. Here, we report our results of the magnetoresistance (MR) on Ta2NiSe7. A breakdown of Kohler's rule is found upon entering the CDW state. Concomitantly, a clear change in curvature in the field dependence of MR is observed. We show that the curvature change is well described by the two-band orbital MR, with the hole density being strongly suppressed in the CDW state, indicating that the p orbitals from Se atoms dominate the change in transport through CDW transition.

Original languageEnglish (US)
Article number052405
JournalApplied Physics Letters
Volume111
Issue number5
DOIs
StatePublished - Jul 31 2017

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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