Vanishing Zeeman energy in a two-dimensional hole gas

Abstract

A clear signature of Zeeman split states crossing is observed in 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 top-most and the 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 modelling of hole-based quantum devices.

arXiv commentCorrected typos in expressions for F_l. Minor changes to sections layout

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Cited by in corpus (5)

• Theory of Hole-Spin Qubits in Strained Germanium Quantum Dots
• Hole spin qubits in Si FinFETs with fully tunable spin-orbit coupling and sweet spots for charge noise
• Lightly-strained germanium quantum wells with hole mobility exceeding one million
• Light-Hole Gate-Defined Spin-Orbit Qubit
• Modelling of planar germanium hole qubits in electric and magnetic fields