Author:
Feng Honglei,Li Yong,Shi Youguo,Xie Hong-Yi,Li Yongqing,Xu Yang
Abstract
Research interests in recent years have expanded into quantum materials that display novel magnetism incorporating strong correlations, topological effects, and dimensional crossovers. Fe3GeTe2 represents such a two-dimensional van der Waals platform exhibiting itinerant ferromagnetism with many intriguing properties. Up to date, most electronic transport studies on Fe3GeTe2 have been limited to its anomalous Hall responses while the longitudinal counterpart (such as magnetoresistance) remains largely unexplored. Here, we report a few unusual transport behaviors on thin flakes of Fe3GeTe2. Upon cooling to the base temperature, the sample develops a resistivity upturn that shows a crossover from a marginally –ln T to a –T
1/2 dependence, followed by a lower-temperature deviation. Moreover, we observe a negative and non-saturating linear magnetoresistance when the magnetization is parallel or antiparallel to the external magnetic field. The slope of the linear magnetoresistance also shows a nonmonotonic temperature dependence. We deduce an anomalous contribution to the magnetoresistance at low temperatures with a scaling function proportional –HT
1/2, as well as a temperature-independent linear term. Possible mechanisms that could account for our observations are discussed.
Subject
General Physics and Astronomy
Cited by
8 articles.
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