Suppressing nematicity in FeSe through exfoliation
ORAL
Abstract
The role of nematicity in iron-based superconductors has served as a long-standing challenge regarding how to understand their unique electronic features. How nematicity influence superconductivity and quantum criticality remains an unanswered question. Therefore, a method to control nematicity in iron-based superconductors can provide a pathway to further explore their competing phases. Here, we demonstrate that simple mechanical exfoliation can suppress nematicity in FeSe, an iron-based superconductor. From Raman spectroscopy and transport experiment, we show a clear absence of nematic order in thin FeSe flakes, despite being present in bulk crystals. This shows exfoliation can engineer collective phenomena in FeSe and provide a platform to further explore emergent physics.
*Research was supported by the Air Force Office of Scientific Research under award numbers FA2386-24-1-4071 (transport measurements by W.L. and supervision by K.S.B.) and FA9550-24-1-0110 (Raman experiments by K.Y.K and B.S). The fabrication efforts by M.G. and G.N. were conducted with support from The National Science Foundation, Award No. DMR-2310895.
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Presenters
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Kyung-Mo Kim
- Boston College