7 papers
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…
Parity and time-reversal invariant Ising spin ordering
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…