南方科技大学知识苑(SUSTech KC): Valley filter and giant magnetoresistance in zigzag α-T3nanoribbons

题名	Valley filter and giant magnetoresistance in zigzag α-T3nanoribbons
作者	Tan，Hui 1; Xu，Yong2 ; Wang，Jun 3; Liu，Jun Feng 1; Ma，Zhongshui 4,5
发表日期	2021-03-11
DOI	10.1088/1361-6463/abcbbd
发表期刊	JOURNAL OF PHYSICS D-APPLIED PHYSICS 影响因子和分区
ISSN	0022-3727
EISSN	1361-6463
卷号	54 期号:10
摘要	Due to opposite Berry phases for two valleys in the α-T3 model, the quasiparticles in two valleys have different responses to a perpendicular magnetic field, such as different Landau levels in a strong magnetic field. In this work, we theoretically demonstrate the manipulation of the valley degree of freedom in the α-T3 model via an external magnetic field. In zigzag α-T3 nanoribbons with moderate α, we show that a weak magnetic field lifts the valley degeneracy of the spectrum and the ribbon acts as a valley filter. Furthermore, we propose a valley-valve which contains two successive magnetic sections. The valve exhibits a giant magnetoresistance and the on-off ratio reaches up to 106. These findings should be useful to potential valleytronic applications and magnetic read heads based on α-T3 materials.
关键词	valley filter valley valve giant magnetoresistance
相关链接	[Scopus记录]
收录类别	SCI ; EI
语种	英语
学校署名	其他
资助项目	National Natural Science Foundation of China (NSFC)[11774144,11774006,11574045] ; NBRP of China[2012CB921300]
WOS研究方向	Physics
WOS类目	Physics, Applied
WOS记录号	WOS:000600805700001
出版者	IOP PUBLISHING LTD
EI入藏号	20205309700505
EI主题词	Landforms ; Degrees of freedom (mechanics) ; Magnetic heads
EI分类号	Geology:481.1 ; Magnetism: Basic Concepts and Phenomena:701.2 ; Mechanics:931.1
ESI学科分类	PHYSICS
Scopus记录号	2-s2.0-85098241423
来源库	Scopus
引用统计	被引频次[WOS]：7
成果类型	期刊论文
条目标识符	http://sustech.caswiz.com/handle/2SGJ60CL/210852
专题	理学院_物理系
作者单位	1.School of Physics and Materials Science,Guangzhou University,Guangzhou,510006,China 2.Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China 3.Department of Physics,Southeast University,Nanjing,210096,China 4.School of Physics,Peking University,Beijing,100871,China 5.Collaborative Innovation Center of Quantum Matter,Beijing,100871,China
推荐引用方式 GB/T 7714	Tan，Hui,Xu，Yong,Wang，Jun,et al. Valley filter and giant magnetoresistance in zigzag α-T3nanoribbons[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS,2021,54(10).
APA	Tan，Hui,Xu，Yong,Wang，Jun,Liu，Jun Feng,&Ma，Zhongshui.(2021).Valley filter and giant magnetoresistance in zigzag α-T3nanoribbons.JOURNAL OF PHYSICS D-APPLIED PHYSICS,54(10).
MLA	Tan，Hui,et al."Valley filter and giant magnetoresistance in zigzag α-T3nanoribbons".JOURNAL OF PHYSICS D-APPLIED PHYSICS 54.10(2021).