Congratulations to Dima and Ashwin. The paper "Mechanisms for strong anisotropy of in-plane g-factors in hole based quantum point contacts" by D. S. Miserev, A. Srinivasan, O. A. Tkachenko, V. A. Tkachenko, I. Farrer, D. A. Ritchie, A. R. Hamilton, and O. P. Sushkov, has been published in Phys. Rev. Lett. 119, 116803 (2017).
In-plane hole g-factors measured in quantum point contacts based on p-type heterostructures strongly depend on the orientation of the magnetic field with respect to the electric current. This effect, first reported a decade ago and confirmed in a number of publications, has remained an open problem. Systematic experimental studies to disentangle different mechanisms contributing to the effect is presented in the paper. The theory which describes it successfully is developed. We show that there is a new mechanism for the anisotropy and that this anisotropy is due to a new contribution to the Zeeman spin splitting.
