[16a-S4_201-1~13] 10.2 Fundamental and exploratory device technologies for spin

12:00 PM - 12:15 PM JST(3:00 AM - 3:15 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation AwardEnglish Presentation

[16a-S4_201-12] Magneto-photogalvanic effect across a wide range of metallic material

〇(M1)Ayaka Kamiryo¹, Mahiro Yamamoto², Taiki Nishijima², Ryo Ohshima², Masashi Shiraishi², Yuichiro Ando¹ (1.Osaka Metropolitan Univ., 2.Kyoto Univ.)

Keywords:

magneto-photogalvanic effect,spin accumulation,spin Hall effect

We have reported that applying a DC current to a metal thin wire and irradiating linearly polarized light onto its edge generates a unidirectional photocurrent. This phenomenon is attributed to the magneto-photogalvanic effect (MPGE), which appears in systems where both inversion and time-reversal symmetries are broken. Conventionally, MPGE arises in non-centrosymmetric crystals under broken time-reversal symmetry induced by a magnetic field or magnetization. In contrast, in our study, MPGE is induced by the breaking of time-reversal symmetry due to spin accumulation generated by the spin Hall effect (SHE), together with inversion symmetry breaking at the Hall bar edge. While we have focused on representative spin Hall materials such as Pt and β-W, investigating a wider range of materials is essential to clarify the correlation between SHE and MPGE. In this study, we evaluate MPGE in various materials to clarify its mechanism and occurrence conditions.