TY - JOUR
T1 - Property of the valence-bond ordering in molecular superconductor with a quasi-triangular lattice
AU - Yamamoto, Takashi
AU - Nakazawa, Yasuhiro
AU - Tamura, Masafumi
AU - Nakao, Akiko
AU - Fukaya, Atsuko
AU - Kato, Reizo
AU - Yakushi, Kyuya
N1 - Publisher Copyright:
©2014 The Physical Society of Japan.
PY - 2014/5/15
Y1 - 2014/5/15
N2 - We have investigated the property of the non-magnetic insulating state of a pressure-induced molecular superconductor with a quasi-triangular lattice consisting of tight dimer units applying vibrational and reflectance spectroscopy to monoclinic-phase of C2H5(CH3)3P[Pd(dimt)2]2 (dmit = 1,3-dithiole-2-thione-4,5-dithiolate). From the analyses of the spectra, it is founded that two asymmetric dimers form a weakly bounded tetramer and the 2D layer is a slightly anisotropic. Theses results indicate that the cooperation between nearest Coulomb repulsions and valence bond order, which is operative for the anisotropic system of triclinic-phase of C2H5(CH3)3P[Pd(dimt)2]2, inhibits spin frustration in the monoclinic-phase. Our result also suggests that a half-filled picture does not always hold for the molecular superconductors consisting of tight dimer units.
AB - We have investigated the property of the non-magnetic insulating state of a pressure-induced molecular superconductor with a quasi-triangular lattice consisting of tight dimer units applying vibrational and reflectance spectroscopy to monoclinic-phase of C2H5(CH3)3P[Pd(dimt)2]2 (dmit = 1,3-dithiole-2-thione-4,5-dithiolate). From the analyses of the spectra, it is founded that two asymmetric dimers form a weakly bounded tetramer and the 2D layer is a slightly anisotropic. Theses results indicate that the cooperation between nearest Coulomb repulsions and valence bond order, which is operative for the anisotropic system of triclinic-phase of C2H5(CH3)3P[Pd(dimt)2]2, inhibits spin frustration in the monoclinic-phase. Our result also suggests that a half-filled picture does not always hold for the molecular superconductors consisting of tight dimer units.
UR - http://www.scopus.com/inward/record.url?scp=84924891887&partnerID=8YFLogxK
U2 - 10.7566/JPSJ.83.053703
DO - 10.7566/JPSJ.83.053703
M3 - Article
AN - SCOPUS:84924891887
SN - 0031-9015
VL - 83
JO - journal of the physical society of japan
JF - journal of the physical society of japan
IS - 5
M1 - 053703
ER -