Ambient-pressure molecular superconductor with a superlattice containing layers of tris(oxalato)rhodate enantiomers and 18-crown-6

Lee Martin; Alexander L Morritt; Jordan R Lopez; Hiroki Akutsu; Yasuhiro Nakazawa; Shusaku Imajo; Yoshihiko Ihara

doi:10.1021/acs.inorgchem.6b02708

Ambient-pressure molecular superconductor with a superlattice containing layers of tris(oxalato)rhodate enantiomers and 18-crown-6

Inorg Chem. 2017 Jan 17;56(2):717-720. doi: 10.1021/acs.inorgchem.6b02708. Epub 2017 Jan 5.

Authors

Lee Martin¹, Alexander L Morritt¹, Jordan R Lopez¹, Hiroki Akutsu², Yasuhiro Nakazawa², Shusaku Imajo², Yoshihiko Ihara³

Affiliations

¹ School of Science and Technology, Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS, U.K.
² Department of Chemistry, Graduate School of Science, Osaka University , 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan.
³ Department of Quantum and Condensed Matter Physics, School of Science, Hokkaido University , Kita-ku, Sapporo, Hokkaido 060-0810, Japan.

PMID: 28055197
DOI: 10.1021/acs.inorgchem.6b02708

Abstract

We report a novel multilayered organic-inorganic hybrid material, β″-(BEDT-TTF)₂[(H₂O)(NH₄)₂Rh(C₂O₄)₃]·18-crown-6. This is the first molecular superconductor to have a superlattice with layers of both BEDT-TTF and 18-crown-6 and also the first with the anion tris(oxalato)rhodate. This is the 2D superconductor with the widest gap between conducting layers, where only a single donor packing motif is observed (β″). The strong 2D nature of this system strongly suggests that the superconducting transition is a Kosterlitz-Thouless transition. A superconducting T_c of 2.7 K at ambient pressure was found by transport measurements and 2.5 K by magnetic susceptibility measurements.