2012
DOI: 10.1103/physrevb.85.235308
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Hole spin relaxation inp-type (111) GaAs quantum wells

Abstract: Hole spin relaxation in p-type (111) GaAs quantum wells is investigated in the case with only the lowest hole subband, which is heavy-hole like in (111) GaAs/AlAs and light-hole like in (111) GaAs/InP quantum wells, being relevant. The subband Löwdin perturbation method is applied to obtain the effective Hamiltonian including the Dresselhaus and Rashba spin-orbit couplings. Under a proper gate voltage, the total in-plane effective magnetic field in (111) GaAs/AlAs quantum wells can be strongly suppressed in th… Show more

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Cited by 14 publications
(15 citation statements)
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References 69 publications
(121 reference statements)
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“…In this case the simplest and intuitively natural set of boundary conditions conserving the flux could be merely the continuity of all envelopes at the interface, see Eq. (22). However, such boundary conditions do not account for the reduced microscopic symmetry of a single interface described by the C 2v point group and caused by the anisotropy of chemical bonds in the (001) plane.…”
Section: B Boundary Conditions and Electronic States In Qwsmentioning
confidence: 99%
“…In this case the simplest and intuitively natural set of boundary conditions conserving the flux could be merely the continuity of all envelopes at the interface, see Eq. (22). However, such boundary conditions do not account for the reduced microscopic symmetry of a single interface described by the C 2v point group and caused by the anisotropy of chemical bonds in the (001) plane.…”
Section: B Boundary Conditions and Electronic States In Qwsmentioning
confidence: 99%
“…Vivid examples are semiconductor quantum wells [7,8] and oxide surfaces and interfaces [9][10][11][12][13], which prominently feature the so-called cubic, R ð3Þ , Rashba effect responsible for the nonlinear (∝ jkj 3 ) dependence of the spin-orbit splitting of 2D heavy-hole states [14][15][16]. Remarkably, the EMF in the R ð3Þ model has a different symmetry from the R ð1Þ model, so that the in-plane pseudospin of the heavy hole rotates three times faster in moving around the Fermi contour and is no longer orthogonal to k everywhere [9,[17][18][19][20].…”
mentioning
confidence: 99%
“…To our knowledge, the influence of the QW symmetry on hole-spin dephasing has only been considered for (111)-grown QWs, so far [12], and merits further investigation.…”
Section: -5mentioning
confidence: 99%
“…Here, the choice of growth-axis symmetry allows for suppression of spin dephasing for particular spin orientations in (110)-grown QWs [1][2][3][4], cancellation of Rashba and Dresselhaus spin-orbit fields in (111)-grown structures [5,6], or the formation of a persistent spin helix state in (001)-grown QWs [7][8][9]. Similar studies using these crystallographic degrees of freedom for two-dimensional hole systems (2DHSs) are lacking, even though large anisotropies of the g factor [10,11] and suppression of hole-spin dephasing [12] have been predicted. This is, in part, due to the difficulties associated with p-modulation doping, which requires different growth strategies depending on the crystallographic orientation of a 2DHS [13][14][15].…”
Section: Introductionmentioning
confidence: 99%