Abstract
We study the intrinsic electronic anisotropy and fermiology of the quasi-one-dimensional superconductor . Below K, we detect a thermodynamic phase transition that predominantly affects the conductivity perpendicular to the quasi-one-dimensional chains. The transition relates to the presence of charge order that precedes superconductivity. Remarkably, the Fermi surface pockets detected by de Haas–van Alphen oscillations are unaffected by this transition, suggesting that the ordered state does not break any translational symmetries but rather alters the scattering of the quasiparticles themselves.
- Received 5 July 2016
- Revised 21 January 2017
DOI:https://doi.org/10.1103/PhysRevB.95.075121
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