Current direction dependent magnetotransport in CuTe

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Title:	Current direction dependent magnetotransport in CuTe
Authors:	Hsueh, Hung-chung
Date:	2023-09-28
Issue Date:	2024-03-01 12:05:57 (UTC+8)
Publisher:	American Physical Society (APS)
Abstract:	Despite being a layered, easily-exfoliated compound, copper monotelluride (CuTe) features an unusual quasi-one-dimensional charge density wave below TCDW ≈ 335K. Within a CuTe layer, the electrical resistivity depends sensitively on the direction of the electrical current. Here, we use magnetotransport to probe the metallic state of CuTe with two distinct in-plane current directions. When the current flows along the a axis (I //a), the magnetoresistance exhibits a downward curvature as the magnetic field increases. On the other hand, when the current is along the b axis (I //b), the magnetoresistance shows the opposite curvature. Our analysis uncovers a violation of Kohler scaling, but only for I //a. Shubnikov–de Haas oscillations are detected at low temperatures. Our results shed light on the nature of the metallic state in CuTe with the development of the charge density wave.
Relation:	Phyiscal Review B 108,　p.115162
DOI:	10.1103/PhysRevB.108.115162
Appears in Collections:	[Graduate Institute & Department of Physics] Journal Article

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