Topologically nontrivial interband plasmons in type-II Weyl semimetal MoTe2

doi:10.1088/1367-2630/abbca5

	Topologically nontrivial interband plasmons in type-II Weyl semimetal MoTe2
	Jia, Xun 3,4,5; Wang, Maoyuan 6; Yan, Dayu 3,4,5; Xue, Siwei 3,4,5; Zhang, Shuyuan 3,4,5; Zhou, Jianhui 7; Shi, Youguo 1,3,4; Zhu, Xuetao 1,3,4,5; Yao, Yugui 6; Guo, Jiandong 1,2,3,4,5
刊名	NEW JOURNAL OF PHYSICS
	2020-10-01
卷号	22
关键词	plasmon topological semimetal high resolution electron energy loss spectroscopy
ISSN号	1367-2630
DOI	10.1088/1367-2630/abbca5
通讯作者	Zhou, Jianhui(jhzhou@hmfl.ac.cn) ; Zhu, Xuetao(xtzhu@iphy.ac.cn) ; Guo, Jiandong(jdguo@iphy.ac.cn)
英文摘要	In many realistic topological materials, more than one kind of fermions contribute to the electronic bands crossing the Fermi level, leading to various novel phenomena. Here, using momentum-resolved inelastic electron scattering, we investigate the plasmons and their evolution across the phase transition in a type-II Weyl semimetal MoTe2, in which both Weyl fermions and trivial electrons contribute to the Fermi surface in theT(d)phase. One plasmon mode in the 1T ' phase at high temperature and two plasmon modes in the topologicalT(d)phase at low temperature are observed. Combining with first-principles calculations, we show that all the plasmon modes are dominated by the interband correlations between the inverted bands of MoTe2. Especially in theT(d)phase, since the electronic bands split due to inversion symmetry breaking and spin-orbit coupling, the plasmon modes manifest the interband correlation between the topological Weyl fermions and the trivial electrons. Our work emphasizes the significance of the interplay between different kinds of carriers in plasmons of topological materials.
资助项目	National Natural Science Foundation of China[11874404] ; National Natural Science Foundation of China[11634016] ; National Key R&D Program of China[2016YFA0302400] ; National Key R&D Program of China[2017YFA0303600] ; National Key R&D Program of China[2016YFA0300600] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB30000000] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB33000000] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2016008] ; BAQIS Research Program[Y18G09] ; Beijing Natural Science Foundation[Z180008] ; High Magnetic Field Laboratory of Anhui Province
WOS关键词	DIRAC PLASMONS ; SURFACE
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000577766100001
资助机构	National Natural Science Foundation of China ; National Key R&D Program of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Youth Innovation Promotion Association of Chinese Academy of Sciences ; BAQIS Research Program ; Beijing Natural Science Foundation ; High Magnetic Field Laboratory of Anhui Province
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/104515]
专题	中国科学院合肥物质科学研究院
通讯作者	Zhou, Jianhui; Zhu, Xuetao; Guo, Jiandong
作者单位	1.Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China 2.Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China 3.Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China 4.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China 5.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 6.Beijing Inst Technol, Beijing Key Lab Nanophoton & Ultrafine Optoelect, Sch Phys, Key Lab Adv Optoelect Quantum Architecture & Meas, Beijing 100081, Peoples R China 7.Chinese Acad Sci, High Field Magnet Lab, Anhui Prov Key Lab Condensed Matter Phys Extreme, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Jia, Xun,Wang, Maoyuan,Yan, Dayu,et al. Topologically nontrivial interband plasmons in type-II Weyl semimetal MoTe2[J]. NEW JOURNAL OF PHYSICS,2020,22.
APA	Jia, Xun.,Wang, Maoyuan.,Yan, Dayu.,Xue, Siwei.,Zhang, Shuyuan.,...&Guo, Jiandong.(2020).Topologically nontrivial interband plasmons in type-II Weyl semimetal MoTe2.NEW JOURNAL OF PHYSICS,22.
MLA	Jia, Xun,et al."Topologically nontrivial interband plasmons in type-II Weyl semimetal MoTe2".NEW JOURNAL OF PHYSICS 22(2020).