Resistance Anomaly and Linear Magnetoresistance in Thin Flakes of Itinerant Ferromagnet Fe$_{3}$GeTe$_{2}$
Honglei Feng1,2, Yong Li1,2, Youguo Shi1,2,3, Hong-Yi Xie4, Yongqing Li1,2,3, and Yang Xu1,2*
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China 2School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China 3Songshan Lake Materials Laboratory, Dongguan 523808, China 4Division of Quantum State of Matter, Beijing Academy of Quantum Information Sciences, Beijing 100193, China
Abstract：Research interests in recent years have expanded into quantum materials that display novel magnetism incorporating strong correlations, topological effects, and dimensional crossovers. Fe$_{3}$GeTe$_{2}$ represents such a two-dimensional van der Waals platform exhibiting itinerant ferromagnetism with many intriguing properties. Up to date, most electronic transport studies on Fe$_{3}$GeTe$_{2}$ 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 Fe$_{3}$GeTe$_{2}$. 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.
Huang B, Clark G, Klein D R, MacNeill D, Navarro-Moratalla E, Seyler K L, Wilson N, McGuire M A, Cobden D H, Xiao D, Yao W, Jarillo-Herrero P, and Xu X 2018 Nat. Nanotechnol.13 544
[8]
Deng Y, Yu Y, Song Y, Zhang J, Wang N Z, Sun Z, Yi Y, Wu Y Z, Wu S, Zhu J, Wang J, Chen X H, and Zhang Y 2018 Nature563 94
[9]
Wang Z, Zhang T, Ding M, Dong B, Li Y, Chen M, Li X, Huang J, Wang H, Zhao X, Li Y, Li D, Jia C, Sun L, Guo H, Ye Y, Sun D, Chen Y, Yang T, Zhang J, Ono S, Han Z, and Zhang Z 2018 Nat. Nanotechnol.13 554
[10]
Fei Z, Huang B, Malinowski P, Wang W, Song T, Sanchez J, Yao W, Xiao D, Zhu X, May A F, Wu W, Cobden D H, Chu J H, and Xu X 2018 Nat. Mater.17 778
[11]
Kim K, Seo J, Lee E, Ko K T, Kim B S, Jang B G, Ok J M, Lee J, Jo Y J, Kang W, Shim J H, Kim C, Yeom H W, Il Min B, Yang B J, and Kim J S 2018 Nat. Mater.17 794
Wang Z, Sapkota D, Taniguchi T, Watanabe K, Mandrus D, and Morpurgo A F 2018 Nano Lett.18 4303
[18]
Zhu W, Lin H, Yan F, Hu C, Wang Z, Zhao L, Deng Y, Kudrynskyi Z R, Zhou T, Kovalyuk Z D, Zheng Y, Patanè A, Žtić I, Li S, Zheng H, and Wang K 2021 Adv. Mater.33 2104658
[19]
Hu C, Zhang D, Yan F, Li Y, Lv Q, Zhu W, Wei Z, Chang K, and Wang K 2020 Sci. Bull.65 1072
Zhang Y, Lu H Y, Zhu X G, Tan S Y, Feng W, Liu Q, Zhang W, Chen Q Y, Liu Y, Luo X B, Xie D H, Luo L Z, Zhang Z J, and Lai X C 2018 Sci. Adv.4 eaao6791
[22]
Xu X, Li Y W, Duan S R, Zhang S L, Chen Y J, Kang L, Liang A J, Chen C, Xia W, Xu Y, Malinowski P, Xu X D, Chu J H, Li G, Guo Y F, Liu Z K, Yang L X, and Chen Y L 2020 Phys. Rev. B101 201104
[23]
Bao S, Wang W, Shangguan Y, Cai Z, Dong Z Y, Huang Z, Si W, Ma Z, Kajimoto R, Ikeuchi K, Yano S I, Yu S L, Wan X, Li J X, and Wen J 2022 Phys. Rev. X12 011022
[24]
Zhu J X, Janoschek M, Chaves D S, Cezar J C, Durakiewicz T, Ronning F, Sassa Y, Mansson M, Scott B L, Wakeham N, Bauer E D, and Thompson J D 2016 Phys. Rev. B93 144404
[25]
Novoselov K S, Geim A K, Morozov S V, Jiang D, Zhang Y, Dubonos S V, Grigorieva I V, and Firsov A A 2004 Science306 666
[26]
Wang L, Meric I, Huang P Y, Gao Q, Gao Y, Tran H, Taniguchi T, Watanabe K, Campos L M, Muller D A, Guo J, Kim P, Hone J, Shepard K L, and Dean C R 2013 Science342 614
[27]
Verchenko V Y, Tsirlin A A, Sobolev A V, Presniakov I A, and Shevelkov A V 2015 Inorg. Chem.54 8598
[28]
Tan C, Lee J, Jung S G, Park T, Albarakati S, Partridge J, Field M R, McCulloch D G, Wang L, and Lee C 2018 Nat. Commun.9 1554
2022, Vol. 39 
