| 研究実績の概要 |
Magnetic Weyl semimetals (MWSMs) possess rich interactions between magnetic and electronic structures with non-trivial topology. In a MWSM Mn3Sn with a chiral-spin structure, we demonstrated a characteristic chiral-spin dynamics driven by electric current - the magnetic order parameter, so-called octupole moment, rotates oppositely to the conventional dipole moments. We term this effect as "handedness anomaly", which provides guideline for the coherent control of chiral-spin structures. We also achieved magnetic manipulation of the geometric structure (in other words, "shape") of the electronic states in Mn3Sn-based heterostructures.It sets up a paradigm to design novel electronic devices based on the quantum-mechanical states in MWSMs.
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