9 papers
Bridging ambient- and high-pressure superconductivity in LaLnNiO films
Motoki Osada, Chieko Terakura, Shusaku Imajo +9
The discovery of high critical-temperature superconductivity near 80 K in bilayer nickelates under high pressure has sparked extensive studies. While superconducti…
Circular Raman responses from angular-momentum inequivalence in CoSi
Yuki Suganuma, Gakuto Kusuno, Kohei Miyazaki +8
Circularly polarized Raman scattering in solids exhibits distinct phenomena such as Raman optical activity (ROA) and chiral-phonon-induced frequency splitting, whose relationship h…
Pressure-induced superconductivity in epitaxially-stabilized PrNiO films
Motoki Osada, Chieko Terakura, Hsiao-Yi Chen +8
The discovery of high critical-temperature superconductivity in LaNiO under high pressure has led to a rapid expansion of the range th…
Real-space determination of orbital states driving successive phase transitions in FeV2O4
Chihaya Koyama, Yusuke Nomura, Shunsuke Kitou +8
Direct experimental access to orbital states in strongly correlated materials remains a major challenge, despite their central role in driving coupled structural and magnetic phase…
Electric toroidal octupolar symmetry in pyrite FeS probed by Raman optical activity
Yuki Suganuma, Gakuto Kusuno, Hikaru Watanabe +4
We report Raman optical activity in pyrite FeS, which hosts an electric toroidal octupolar symmetry. A clear and reproducible sign reversal of the circular intensity difference…
Ferroaxial magnets: time-reversal-even mirror symmetry violation from spin order
Hikaru Watanabe, Yue Yu, Jin Matsuda +2
We investigate ferroaxial magnets, a new class of spin-order-driven multiferroic magnets in which magnetic ordering induces mirror-symmetry breaking while preserving both time-reve…
Intrinsic longitudinal spin-conductivity from ferroaxial spin-symmetry breaking
Yue Yu, Jin Matsuda, Hikaru Watanabe +2
The interplay of antiferromagnetic order, momentum-dependent Bloch spin-splitting, time-reversal (T), and parity (P) symmetries in non-relativistic systems has emerged as a central…
Large magneto-optical Kerr effect induced by collinear antiferromagnetic order
H. Yoshimochi, K. Yoshida, R. Oiwa +6
In modern technology, the optical readout of magnetic information is conventionally achieved by the magneto-optical Kerr effect, i.e., the polarization rotation of reflected light.…
180-twisted bilayer ReSe as an artificial noncentrosymmetric semiconductor
S. Akatsuka, M. Sakano, T. Yamamoto +18
We have fabricated a 180-twisted bilayer ReSe by stacking two centrosymmetric monolayer ReSe flakes in opposite directions, which is expected to lose spatial invers…