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Selective control of valley polarization in monolayer transition metal dichalcogenides among multiexcitonic states

文献类型：期刊论文

作者Liang, Lun2; Yang, Di2; Liu, Wen3; Qu, Fanyao4; Hao, Ning1; Zhang, Ping2,5; Fu, Jiyong2,4
刊名APPLIED PHYSICS LETTERS
出版日期2024-09-23
卷号125
ISSN号0003-6951
DOI10.1063/5.0214388
通讯作者Fu, Jiyong(yongjf@qfnu.edu.cn)
英文摘要In 2018, an inverted valley polarization (VP) for the biexciton emission in monolayer WS2 was experimentally observed [Nagler et al., Phys. Rev. Lett. 121, 057402 (2018)]. Here, we develop a comprehensive model, which incorporates thermal effect and magnetic response of exciton and biexciton complexes with both intra- and intervalley relaxation channels, to reveal the underlying physics. We obtain the inverted biexciton VP, in excellent agreement with the experimental data. Notably, beyond available experimental measurements, our theory also predicts a reversal of VP for excitons associated with the intra- and intervalley thermalization processes, greatly fascinating for selective VP control among distinct excitonic states. These (i) open a pathway toward valley exciton based field-effect transistor and (ii) make possible a concept of "excitonic filter," which resembles spin filter while with functionality of selectively filtering excitonic states, offering an intriguing platform for spintronic and orbitronic as well as valleytronic combined applications. A comparison with other W-based and even Mo-based monolayers of transition metal dichalcogenides including WSe2, MoSe2, and MoS2 is also made.
WOS关键词BIEXCITONS ; LIFETIMES
资助项目National Natural Science Foundation of China[12274256] ; National Natural Science Foundation of China[11874236] ; National Natural Science Foundation of China[12022413] ; National Natural Science Foundation of China[11674331] ; National Natural Science Foundation of China[61674096] ; Major Basic Program of Natural Science Foundation of Shandong Province[ZR2021ZD01] ; National Key R&D Program of China[2022YFA1403200] ; Chinese Academy of Sciences[XDB33030100]
WOS研究方向Physics
语种英语
WOS记录号WOS:001318792600005
出版者AIP Publishing
资助机构National Natural Science Foundation of China ; Major Basic Program of Natural Science Foundation of Shandong Province ; National Key R&D Program of China ; Chinese Academy of Sciences
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/135482]  
专题中国科学院合肥物质科学研究院
通讯作者Fu, Jiyong
作者单位1.Chinese Acad Sci, Anhui Prov Key Lab Low Energy Quantum Mat & Device, High Magnet Field Lab, HFIPS, Hefei 230031, Anhui, Peoples R China
2.Qufu Normal Univ, Dept Phys, Qufu 273165, Shandong, Peoples R China
3.Jining Univ, Dept Phys, Jining 273155, Shandong, Peoples R China
4.Univ Brasilia, Inst Fis, BR-70919970 Brasilia, DF, Brazil
5.Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China
推荐引用方式
GB/T 7714		 Liang, Lun,Yang, Di,Liu, Wen,et al. Selective control of valley polarization in monolayer transition metal dichalcogenides among multiexcitonic states[J]. APPLIED PHYSICS LETTERS,2024,125.
APA Liang, Lun.,Yang, Di.,Liu, Wen.,Qu, Fanyao.,Hao, Ning.,...&Fu, Jiyong.(2024).Selective control of valley polarization in monolayer transition metal dichalcogenides among multiexcitonic states.APPLIED PHYSICS LETTERS,125.
MLA Liang, Lun,et al."Selective control of valley polarization in monolayer transition metal dichalcogenides among multiexcitonic states".APPLIED PHYSICS LETTERS 125(2024).

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来源：合肥物质科学研究院

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