We report detailed study of angular-dependent magnetoresistance (AMR) with tilting angel θ from c-axis ranging from 0∘ to 360∘ on a high-quality FeSe single crystal. A pronounced AMR with twofold symmetry is observed, which is caused by the quasi two-dimensional (2D) Fermi surface. The pronounced AMR is observed only in the orthorhombic phase, indicating that the quasi-2D Fermi surface is induced by the structural transition. Details about the influence of the multiband effect to the AMR are also discussed. Besides, the angular response of a possible Dirac-cone-like band structure is investigated by analyzing the detailed magnetoresistance at different θ. The obtained characteristic field (B∗) can be also roughly scaled in the 2D approximation, which indicates that the Dirac-cone-like state is also 2D in nature.
@article{arxiv.1610.03211,
title = {Structural-transition-induced quasi two-dimensional Fermi surface in FeSe},
author = {Yue Sun and Tatsuhiro Yamada and Sunseng Pyon and Tsuyoshi Tamegai},
journal= {arXiv preprint arXiv:1610.03211},
year = {2016}
}