16 papers
Magnetization induced by a nonlinear response to temperature gradient in , and altermagnets
Motohiko Ezawa
It is a highly nontrivial question whether magnetization is induced by a nonlinear response to a temperature gradient in systems where the linear response is forbidden by inversion…
Fourth-order and six-order nonlinear spin current rectifier in three-dimensional -wave and -wave odd-parity magnet
Motohiko Ezawa
Higher-order symmetric -wave magnets consist of two groups. One includes -wave, -wave and -wave altermagnets, while the other includes -wave and -wave odd-parity…
Spin-selective elliptic optical dichroism and perfectly spin-polarized third-order nonlinear photocurrent in altermagnets
Motohiko Ezawa
We show that the low-energy theory of a -wave altermagnet is characterized by anisotropic Dirac cones with spin-split band structures based on a recently proposed tight-binding…
Non-Clifford symmetry protected topological higher-order cluster states in multi-qubit measurement-based quantum computation
Motohiko Ezawa
A cluster state is a strongly entangled state, which is a source of measurement-based quantum computation. It is generated by applying controlled-Z (CZ) gates to the state $\left\v…
Nonlinear spin-Seebeck diode in -wave magnets, third-order spin-Nernst effects in -wave magnets and spin-Nernst effects in -wave altermagnets
Motohiko Ezawa
A prominent feature of -wave altermagnets is that spin current is generated by applying temperature gradient, which is known as the spin-Nernst effect. We show in -wave magne…
Quantum geometry and -wave magnets with
Motohiko Ezawa
Quantum geometry is a differential geometry based on quantum mechanics. It is related to various transport and optical properties in condensed matter physics. The Zeeman quantum ge…