Related Experiment Video
Updated: Oct 14, 2025

High-Temperature and High-Pressure In situ Magic Angle Spinning Nuclear Magnetic Resonance Spectroscopy
Published on: October 9, 2020
Searching strong 'spin'-orbit coupled one-dimensional hole gas in strong magnetic fields
1Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, People's Republic of China.
Abstract:
We show that a strong 'spin'-orbit coupled one-dimensional hole gas is achievable via applying a strong magnetic field to the original two-fold degenerate (spin degeneracy) hole gas confined in a cylindrical Ge nanowire. Both strong longitudinal and strong transverse magnetic fields are feasible to achieve this goal. Based on quasi-degenerate perturbation calculations, we show the induced low-energy subband dispersion of the hole gas can be written asE=ℏ2kz2/(2mh*)+ασzkz+gh*μBBσx/2, a form exactly the same as that of the electron gas in the conduction band. Here the Pauli matricesσrepresent a pseudo spin (or 'spin'), because the real spin degree of freedom has been split off from the subband dispersions by the strong magnetic field. Also, for a moderate nanowire radiusR= 10 nm, the induced effective hole massmh*(0.065∼0.08me)and the 'spin'-orbit couplingα(0.35 ∼ 0.8 eV Å) have a small magnetic field dependence in the studied magnetic field interval 1 <B< 15 T, while the effectiveg-factorgh*of the hole 'spin' only has a small magnetic field dependence in the large field region.
More Related Videos
09:06Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
07:42Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
Published on: July 20, 2022
Related Concept Videos
Atomic Nuclei: Nuclear Magnetic Moment
Atomic Nuclei: Nuclear Spin State Overview
Spin–Spin Coupling: One-Bond Coupling
Atomic Nuclei: Nuclear Spin State Population Distribution
Atomic Nuclei: Nuclear Relaxation Processes
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...