Picosecond Trajectory of Two-Dimensional Vortex Motion in FeSe0.5Te0.5 Visualized by Terahertz Second Harmonic Generation

Sachiko Nakamura, Haruki Matsumoto, Hiroki Ogawa, Tomoki Kobayashi, Fuyuki Nabeshima, Atsutaka Maeda, Ryo Shimano

研究成果: ジャーナルへの寄稿学術誌査読

1 被引用数 (Scopus)

抄録

We have investigated the vortex dynamics in a thin film of an iron-based superconductor FeSe0.5Te0.5 by observing second-harmonic generation (SHG) in the terahertz frequency range. We visualized the picosecond trajectory of two-dimensional vortex motion in a pinning potential tilted by Meissner shielding current. The SHG perpendicular to the driving field is observed, corresponding to the nonreciprocal nonlinear Hall effect under the current-induced inversion symmetry breaking, whereas the linear Hall effect is negligible. The estimated vortex mass, as light as a bare electron, suggests that the vortex core moves independently from quasiparticles at such a high frequency and large velocity ≈300 km/s.

本文言語英語
論文番号036004
ジャーナルPhysical review letters
133
3
DOI
出版ステータス出版済み - 7月 19 2024
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学一般

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