Saddle-point excitons and intraband (Γ-Π) mixing in strained-layer superlattices

Mj, Lawless; Rj, Warburton; Nicholas, R.J.; Nj, Pulsford; Kj, Moore; Duggan, G.; Woodbridge, K.

doi:10.1103/physrevb.45.4266

Cited by 9 publications

(2 citation statements)

References 19 publications

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“…Measuring Zeeman splitting (ZS) of hole states under an external magnetic field has been central in probing hole spin properties, as it is directly related to the hole g factor, which is itself strongly influenced by the underlying SOI, strain, symmetry, and confinement [24,25]. In III-V semiconductors [24,[26][27][28][29][30][31][32][33][34][35][36][37][38], hole spin splitting depends nonlinearly on the out-of-plane magnetic field strength B, causing Landau level crossings and anticrossings [28,39] and Zeeman crossings and anticrossings [12,40,41]. The nonlinearity is usually modeled by a quadratic-in-field contribution to ZS [24], which owes its existence to valence band mixing.…”

Section: Introductionmentioning

confidence: 99%

Vanishing Zeeman energy in a two-dimensional hole gas

et al. 2020

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A clear signature of Zeeman split states crossing is observed in a Landau fan diagram of strained germanium two-dimensional hole gas. The underlying mechanisms are discussed based on a perturbative model yielding a closed formula for the critical magnetic fields. These fields depend strongly on the energy difference between the topmost and neighboring valence bands and are sensitive to the quantum well thickness, strain, and spin-orbit interaction. The latter is a necessary feature for the crossing to occur. This framework enables a straightforward quantification of the hole-state parameters from simple measurements, thus paving the way for its use in design and modeling of hole-based quantum devices.

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Section: Introductionmentioning

confidence: 99%

Vanishing Zeeman energy in a two-dimensional hole gas

et al. 2020

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“…Measuring Zeeman splitting (ZS) of hole states under an external magnetic field has been central in probing hole spin properties, as it is directly related to the hole g-factor, which is itself strongly influenced by the underlying SOI, strain, symmetry, and quantum confinement 24,25 . In III-V semiconductors 24,[26][27][28][29][30][31][32][33][34][35][36][37][38] , it was demonstrated that hole spin splitting depends nonlinearly on the out-of-plane magnetic field strength B, causing Landau level crossings/anti-crossings 28 and Zeeman crossings/anti-crossings 12,39,40 . The nonlinearity is usually modeled by a quadratic-in-field contribution to ZS 24 , which owes its existence to valence band mixing.…”

mentioning

confidence: 99%