Microscopic coexistence of superconductivity and charge order in organic superconductor $β''$-(BEDT-TTF)$_{4}$[(H$_3$O)Ga(C$_2$O$_4$)$_3$]$\cdot$C$_6$H$_5$NO$_2$

Yoshihiko Ihara; Kazuki Moribe; Suhei Fukuoka; Atsushi Kawamoto

doi:10.1103/PhysRevB.100.060505

paper

Microscopic coexistence of superconductivity and charge order in organic superconductor $β^{''}$ -(BEDT-TTF) $_{4}$ [(H $_{3}$ O)Ga(C $_{2}$ O $_{4}$ ) $_{3}$ ] $\cdot$ C $_{6}$ H $_{5}$ NO $_{2}$

arXiv:1908.05448 · doi:10.1103/PhysRevB.100.060505

Abstract

The electron paramagnetic resonance study for an organic superconductor $β^{''}$ -(BEDT-TTF) $_{4}$ [(H $_{3}$ O)Ga(C $_{2}$ O $_{4}$ ) $_{3}$ ] $\cdot$ C $_{6}$ H $_{5}$ NO $_{2}$ reveals that superconductivity coexists uniformly with the charge ordered state in one material. In the charge ordered state, the interplane spin exchange is gapped, while the in-plane conductivity is not significantly modified. This anisotropic behavior is explained by the exotic charge ordered state, in which molecular-site selective carrier localization coexists with conducting carriers on other molecules. Relationship between superconductivity and this conductive charge ordered state is investigated.

5 pages, 4 figures. Accepted for publication in Physical Review B

Microscopic coexistence of superconductivity and charge order in organic superconductor β′′-(BEDT-TTF)4​[(H3​O)Ga(C2​O4​)3​]⋅C6​H5​NO2​

Abstract

Microscopic coexistence of superconductivity and charge order in organic superconductor $β^{''}$ -(BEDT-TTF) $_{4}$ [(H $_{3}$ O)Ga(C $_{2}$ O $_{4}$ ) $_{3}$ ] $\cdot$ C $_{6}$ H $_{5}$ NO $_{2}$