Li R. Low-energy subband wave-functions and effective
g-factor of one-dimensional hole gas.
JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021;
33:355302. [PMID:
34153960 DOI:
10.1088/1361-648x/ac0d18]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 06/21/2021] [Indexed: 06/13/2023]
Abstract
One-dimensional (1D) hole gas confined in a cylindrical Ge nanowire has potential applications in quantum information technologies. Here, we analytically study the low-energy properties of this 1D hole gas. The subbands of the hole gas are two-fold degenerate. The low-energy subband wave-functions are obtained exactly, and the degenerate pairs are related to each other via a combination of the time-reversal and the spin-rotation transformations. In evaluating the effectiveg-factor of these low-energy subbands, the orbital effects of the magnetic field are shown to contribute as strongly as the Zeeman term. Also, near the center of thekzspace, there is a sharp dip or a sharp peak in the effectiveg-factor. At the sitekz= 0, the longitudinalg-factorglis much less than the transverseg-factorgtfor the lowest subband, while away from the sitekz= 0,glcan be comparable togt.
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