Below Ts∼90K, single-crystal FeSe undergoes a structural phase transition coinciding with the emergence of lattice domain boundaries, termed twin boundaries. Polarized-light microscopy validated the presence of twin boundaries in pristine FeSe and indicated the existence of extensive microsized twining in proton-irradiated FeSe. In twinned FeSe, vortex penetration displays a fractal, mazelike pattern, likely guided by these twin domains. We speculate substantial microtwinning in the proton-irradiation crystals, yet macroscopic twin boundaries persist as primary conduits for vortex motion.

Vortex penetration along twin boundaries in pristine and proton-irradiated FeSe / Ren, Tong; Sun, Yue; Laviano, Francesco; Sakagami, Ryousuke; Shi, Zhi Xiang; Tamegai, Tsuyoshi. - In: PHYSICAL REVIEW MATERIALS. - ISSN 2475-9953. - 8:8(2024). [10.1103/physrevmaterials.8.084806]

Vortex penetration along twin boundaries in pristine and proton-irradiated FeSe

Laviano, Francesco;Tamegai, Tsuyoshi
2024

Abstract

Below Ts∼90K, single-crystal FeSe undergoes a structural phase transition coinciding with the emergence of lattice domain boundaries, termed twin boundaries. Polarized-light microscopy validated the presence of twin boundaries in pristine FeSe and indicated the existence of extensive microsized twining in proton-irradiated FeSe. In twinned FeSe, vortex penetration displays a fractal, mazelike pattern, likely guided by these twin domains. We speculate substantial microtwinning in the proton-irradiation crystals, yet macroscopic twin boundaries persist as primary conduits for vortex motion.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2995397