Strain tuning the magnetic and transport properties of Mn${}_3$Ge

Abstract

The kagome lattice antiferromagnet Mn${}_3$Ge has a local hexagonal symmetry with a 120${}^{\circ }$ ordered ground state. This non-colinear ground state engenders a strong anomalous Hall response. The main goal of this work is to understand the effect of strain on this response. We derive an effective model for the Hall vector which functions as our order parameter. Using this model we show how both intra and inter planar strains can be used to switch the sign of the Hall response at a constant magnetic field. Further, we also investigate the effect of this strain on the spin wave band gaps and show that strain can be used to effectively manipulate them, which can be used to tune the magnon responses in this system.

9 pages, 5 figures

References in corpus (7)

• Piezomagnetic switching of anomalous Hall effect in an antiferromagnet at room temperature
• Integration of the Noncollinear Antiferromagnetic Metal Mn3Sn onto Ferroelectric Oxides for Electric-Field Control
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Cited by in corpus (3)

• Theory of nematic charge orders in kagome metals
• Tuning the Hall response of a noncollinear antiferromagnet via spin-transfer torques and oscillating magnetic fields
• Uniaxial stress tuning of the anomalous Hall effect in Mn3Ge