Effect of aging-induced disorder on the quantum transport properties of few-layer WTe2

IMR OpenIR

	Effect of aging-induced disorder on the quantum transport properties of few-layer WTe2
	Liu, Wei Lai; Chen, Mao Lin; Li, Xiao Xi; Dubey, Sudipta; Xiong, Ting; Dai, Zhi Ming; Yin, Jun; Guo, Wan Lin; Ma, Jin Long; Chen, Ya Ni; Tan, Jun; Li, Da; Wang, Zhen Hua; Li, Wu; Bouchiat, Vincent; Sun, Dong Ming; Han, Zheng; Zhang, Zhi Dong; Sun, DM; Han, Z (reprint author), Chinese Acad Sci, IMR, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.; Han, Z (reprint author), Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China.
	2017-03-01
发表期刊	2D MATERIALS
ISSN	2053-1583
卷号	4 期号:1 页码:-
摘要	The emerging physical phenomena found in transition metal dicalcogenides (TMDCs) have triggered vast investigations in recent years. Among them, nanoelectronics in WTe2 devices have attracted particular attentions due to its exotic band structure that leads to exciting phenomena such as the predicted type-II Weyl semimetallic state. However, the thickness dependence of its quantum transport properties in the two-dimensional limit remains under debate. The major missing ingredient in the previous studies is the aging-induced disorder, as atomically thin layers of TMDCs are often known to be metastable in the ambient atmosphere. Here, we show systematic performance of low temperature quantum electronic transport of few-layer WTe2. It is observed that aging-induced localized electronic states explains the low temperature Coulomb gap in transport measurements, leading to the anomalous magnetotransport which appears to be extrinsic. While few-layered WTe2 shows clear metallic tendency in the fresh state, degraded devices first exhibited a re-entrant insulating behavior, and finally entered a fully insulating state. Correspondingly, a crossover from parabolic to linear magnetoresistance, and, upon further aging, leads to the observation of weak anti-localization. Our study reveals for the first time the correlation between the unusual magnetotransport and disorder in few-layered WTe2, which is indispensable in providing guidance on its future device applications.; The emerging physical phenomena found in transition metal dicalcogenides (TMDCs) have triggered vast investigations in recent years. Among them, nanoelectronics in WTe2 devices have attracted particular attentions due to its exotic band structure that leads to exciting phenomena such as the predicted type-II Weyl semimetallic state. However, the thickness dependence of its quantum transport properties in the two-dimensional limit remains under debate. The major missing ingredient in the previous studies is the aging-induced disorder, as atomically thin layers of TMDCs are often known to be metastable in the ambient atmosphere. Here, we show systematic performance of low temperature quantum electronic transport of few-layer WTe2. It is observed that aging-induced localized electronic states explains the low temperature Coulomb gap in transport measurements, leading to the anomalous magnetotransport which appears to be extrinsic. While few-layered WTe2 shows clear metallic tendency in the fresh state, degraded devices first exhibited a re-entrant insulating behavior, and finally entered a fully insulating state. Correspondingly, a crossover from parabolic to linear magnetoresistance, and, upon further aging, leads to the observation of weak anti-localization. Our study reveals for the first time the correlation between the unusual magnetotransport and disorder in few-layered WTe2, which is indispensable in providing guidance on its future device applications.
部门归属	[liu, wei lai ; chen, mao lin ; li, xiao xi ; xiong, ting ; dai, zhi ming ; tan, jun ; li, da ; wang, zhen hua ; sun, dong ming ; han, zheng ; zhang, zhi dong] chinese acad sci, imr, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china ; [liu, wei lai ; chen, mao lin ; li, xiao xi ; xiong, ting ; dai, zhi ming ; tan, jun ; li, da ; wang, zhen hua ; sun, dong ming ; han, zheng ; zhang, zhi dong] univ sci & technol china, sch mat sci & engn, hefei 230026, anhui, peoples r china ; [dubey, sudipta ; bouchiat, vincent] univ grenoble alpes, cnrs, inst neel, f-38000 grenoble, france ; [yin, jun ; guo, wan lin] nanjing univ aeronaut & astronaut, state key lab mech & control mech struct, key lab intelligent nano mat & devices, minist educ, nanjing 210016, jiangsu, peoples r china ; [yin, jun ; guo, wan lin] nanjing univ aeronaut & astronaut, inst nanosci, nanjing 210016, jiangsu, peoples r china ; [ma, jin long ; chen, ya ni ; li, wu] shenzhen univ, inst adv study, nanhai ave 3688, shenzhen 518060, peoples r china
关键词	Wte2 Quantum Transport Disorder
学科领域	Materials Science, Multidisciplinary
资助者	National Natural Science Foundation of China [51522104, 11504385, 51272256, 61422406, 61574143, 51371175, 51331006]; Chinese Academy of Science [KJZD-EW-M05-3]; EU [604391]; 2DTRANSFORMERS project under OH RISQUE program of Agence Nationale de la Recherche (ANR) [ANR-14-OHRI-0004]
收录类别	SCI
语种	英语
WOS记录号	WOS:000391301000001
引用统计	被引频次：24[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/78275
专题	中国科学院金属研究所
通讯作者	Sun, DM; Han, Z (reprint author), Chinese Acad Sci, IMR, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.; Han, Z (reprint author), Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China.
推荐引用方式 GB/T 7714	Liu, Wei Lai,Chen, Mao Lin,Li, Xiao Xi,et al. Effect of aging-induced disorder on the quantum transport properties of few-layer WTe2[J]. 2D MATERIALS,2017,4(1):-.
APA	Liu, Wei Lai.,Chen, Mao Lin.,Li, Xiao Xi.,Dubey, Sudipta.,Xiong, Ting.,...&Han, Z .(2017).Effect of aging-induced disorder on the quantum transport properties of few-layer WTe2.2D MATERIALS,4(1),-.
MLA	Liu, Wei Lai,et al."Effect of aging-induced disorder on the quantum transport properties of few-layer WTe2".2D MATERIALS 4.1(2017):-.