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Intense high-frequency laser-field control of spin-orbit coupling in GaInAs/AlInAs quantum wells: A laser dressing effect

文献类型：期刊论文

作者Li, Xue5; Wang, Wei4,5; Zhao, Ning5; Yang, Hao5; Han, Shixuan5; Liu, Wen4,5; Wang, Hailong5; Qu, Fanyao3; Hao, Ning2; Fu, Jiyong3,5
刊名PHYSICAL REVIEW B
出版日期2022-10-21
卷号106
ISSN号2469-9950
DOI10.1103/PhysRevB.106.155420
通讯作者Fu, Jiyong(yongjf@qfnu.edu.cn)
英文摘要The Rashba spin-orbit (SO) coupling can flexibly be controlled via an external gate, while the Dresselhaus term, which mainly depends on quantum confinement, is in general immune to electrical control. Here we theoretically report optical manipulation of the SO coupling by resorting to an intense high-frequency laser field, which "dresses" the confining potential for electrons as a result of optical stark effect and enables a flexible and simultaneous control of the Rashba and Dresselhaus couplings. Focusing on ordinary GaInAs/AlInAs quantum wells with two occupied subbands subject to both laser and gate fields, we perform a self-consistent PoissonSchrodinger calculation in the Hartree approximation to determine electro-optical control of the intrasubband (intersubband) Rashba alpha v (q) and Dresselhaus /3v (I') SO terms with v = 1, 2. Under the impact of laser field, we find that the Rashba terms of the two subbands alpha 1 and alpha 2 may remain locked to equal strength in a broad gate range, providing a means for unified manipulation of the two-subband Rashba couplings. Further, as the laser field varies, we observe that alpha 1 and alpha 2 may have either the same or opposite signs, or even alpha 2 vanishes while alpha 1 is finite, greatly fascinating for selective SO control of distinct subbands. For the Dresselhaus coupling, we disclose two distinct scenarios depending on the interplay of the well width and the laser field strength, and reveal that /32 may decrease rapidly when the laser field strengthens, even though /31 remains essentially constant. Regarding the intersubband Rashba (q) and Dresselhaus (I') terms, which mainly depend on the overlap and parity of the wave functions of the two subbands, they have relatively weak dependence on the laser field. Moreover, the combined effect of intra- and intersubband SO terms may lead to crossings and avoided crossings of the energy dispersion of multiband spin branches and may even trigger the spin polarization of an originally spin degenerate (unpolarized) band, tunable by the laser field. Our results should stimulate experiments probing the laser field mediated multiband SO control and further enables its spintronic applications.
WOS关键词2-DIMENSIONAL ELECTRON ; HYDROGENIC IMPURITIES ; RELAXATION ANISOTROPY ; STATES ; GENERATION ; SUBBAND ; HELIX
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] ; Chinese Academy of Sciences[XDB33030100] ; Brazilian funding agency CNPq ; Brazilian funding agency CAPES ; Brazilian funding agency FAPDF ; Shandong Provincial Natural Science Foundation[ZR2019BA007] ; Higher Educational Youth Innovation Science and Technology Program of Shandong Province[2019KJJ010]
WOS研究方向Materials Science ; Physics
语种英语
WOS记录号WOS:000878718400004
出版者AMER PHYSICAL SOC
资助机构National Natural Science Foundation of China ; Major Basic Program of Natural Science Foundation of Shandong Province ; Chinese Academy of Sciences ; Brazilian funding agency CNPq ; Brazilian funding agency CAPES ; Brazilian funding agency FAPDF ; Shandong Provincial Natural Science Foundation ; Higher Educational Youth Innovation Science and Technology Program of Shandong Province
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/130124]  
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.Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China
2.Chinese Acad Sci, Anhui Prov Key Lab Condensed Matter Phys Extreme C, High Magnet Field Lab, HFIPS, Hefei 230031, Peoples R China
3.Univ Brasilia, Inst Fis, BR-70919970 Brasilia, DF, Brazil
4.Jining Univ, Dept Phys, Qufu 273155, Shandong, Peoples R China
5.Qufu Normal Univ, Dept Phys, Qufu 273165, Shandong, Peoples R China
推荐引用方式
GB/T 7714		 Li, Xue,Wang, Wei,Zhao, Ning,et al. Intense high-frequency laser-field control of spin-orbit coupling in GaInAs/AlInAs quantum wells: A laser dressing effect[J]. PHYSICAL REVIEW B,2022,106.
APA Li, Xue.,Wang, Wei.,Zhao, Ning.,Yang, Hao.,Han, Shixuan.,...&Zhang, Ping.(2022).Intense high-frequency laser-field control of spin-orbit coupling in GaInAs/AlInAs quantum wells: A laser dressing effect.PHYSICAL REVIEW B,106.
MLA Li, Xue,et al."Intense high-frequency laser-field control of spin-orbit coupling in GaInAs/AlInAs quantum wells: A laser dressing effect".PHYSICAL REVIEW B 106(2022).

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来源：合肥物质科学研究院

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