Uniaxial strain orientation dependence of superconducting transition temperature (Tc) and critical superconducting pressure (Pc) in β-(BDA-TTP)2I3

Koichi Kikuchi; Takayuki Isono; Masayuki Kojima; Haruo Yoshimoto; Takeshi Kodama; Wataru Fujita; Keiichi Yokogawa; Harukazu Yoshino; Keizo Murata; Takayuki Kaihatsu; Hiroki Akutsu; Jun-ichi Yamada

doi:10.1021/ja207353x

Uniaxial strain orientation dependence of superconducting transition temperature (Tc) and critical superconducting pressure (Pc) in β-(BDA-TTP)2I3

J Am Chem Soc. 2011 Dec 14;133(49):19590-3. doi: 10.1021/ja207353x. Epub 2011 Nov 16.

Authors

Koichi Kikuchi¹, Takayuki Isono, Masayuki Kojima, Haruo Yoshimoto, Takeshi Kodama, Wataru Fujita, Keiichi Yokogawa, Harukazu Yoshino, Keizo Murata, Takayuki Kaihatsu, Hiroki Akutsu, Jun-ichi Yamada

Affiliation

¹ Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192-0937, Japan. kikuchi-koichi@tmu.ac.jp

PMID: 22074598
DOI: 10.1021/ja207353x

Abstract

Dependence of the superconducting transition temperature (T(c)) and critial superconducting pressure (P(c)) of the pressure-induced superconductor β-(BDA-TTP)(2)I(3) [BDA-TTP = 2,5-bis(1,3-dithian-2-ylidene)-1,3,4,6-tetrathiapentalene] on the orientation of uniaxial strain has been investigated. On the basis of the overlap between the upper and lower bands in the energy dispersion curve, the pressure orientation is thought to change the half-filled band to the quarter-filled one. The observed variations in T(c) and P(c) are explained by considering the degree of application of the pressure and the degree of contribution of the effective electronic correlation at uniaxial strains with different orientations parallel to the conducting donor layer.