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

doi:10.1103/PhysRevB.106.155420

	Intense high-frequency laser-field control of spin-orbit coupling in GaInAs/AlInAs quantum wells: A laser dressing effect
	Li, Xue 3; Wang, Wei 3,4; Zhao, Ning 3; Yang, Hao 3; Han, Shixuan 3; Liu, Wen 3,4; Wang, Hailong 3; Qu, Fanyao 1; Hao, Ning 5; Fu, Jiyong 1,3
刊名	PHYSICAL REVIEW B
	2022-10-21
卷号	106
ISSN号	2469-9950
DOI	10.1103/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.
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关键词	2-DIMENSIONAL ELECTRON ; HYDROGENIC IMPURITIES ; RELAXATION ANISOTROPY ; STATES ; GENERATION ; SUBBAND ; HELIX
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000878718400004
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
内容类型	期刊论文
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.Univ Brasilia, Inst Fis, BR-70919970 Brasilia, DF, Brazil 2.Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China 3.Qufu Normal Univ, Dept Phys, Qufu 273165, Shandong, Peoples R China 4.Jining Univ, Dept Phys, Qufu 273155, Shandong, Peoples R China 5.Chinese Acad Sci, Anhui Prov Key Lab Condensed Matter Phys Extreme C, High Magnet Field Lab, HFIPS, Hefei 230031, 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).