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Controlling the helicity of magnetic skyrmions in a -Mn-type high-temperature chiral magnet
K. Karube, K. Shibata, J. S. White +8
Magnetic helices and skyrmions in noncentrosymmetric magnets are representative examples of chiral spin textures in solids. Their spin swirling direction, often termed as the magne…
Negative-pressure-induced helimagnetism in ferromagnetic cubic perovskites SrBaCoO
H. Sakai, S. Yokoyama, A. Kuwabara +9
Helimagnetic materials are identified as promising for novel spintronic applications. Since helical spin order is manifested as a compromise of competing magnetic exchange interact…
Giant anomalous Nernst effect and quantum-critical scaling in a ferromagnetic semimetal
Akito Sakai, Yo Pierre Mizuta, Agustinus Agung Nugroho +9
In metallic ferromagnets, the Berry curvature of underlying quasiparticles can cause an electric voltage perpendicular to both magnetization and an applied temperature gradient, a…
Electronic Structure Calculation and Superconductivity in -(BETS)GaCl
Hirohito Aizawa, Takashi Koretsune, Kazuhiko Kuroki +1
Quasi-two-dimensional molecular conductor -(BETS)GaCl shows superconductivity (SC) below 5.5K, neighboring the dimer-type Mott insulating phase. To elucidate the origin…
Large magneto-optical Kerr effect and imaging of magnetic octupole domains in an antiferromagnetic metal
Tomoya Higo, Huiyuan Man, Daniel B. Gopman +14
When a polarized light beam is incident upon the surface of a magnetic material, the reflected light undergoes a polarization rotation. This magneto-optical Kerr effect (MOKE) has…
Maximally-localized Wannier orbitals and the extended Hubbard model for the twisted bilayer graphene
Mikito Koshino, Noah F. Q. Yuan, Takashi Koretsune +3
We develop an effective extended Hubbard model to describe the low-energy electronic properties of the twisted bilayer graphene. By using the Bloch states in the effective continuu…