TY - JOUR
T1 - Superconductivity and metal-insulator transition in twin-columnar organic superconductor, (BETS)2(X2TCNQ)[X=Cl, Br]
AU - Kondo, Ryusuke
AU - Hasegawa, Tatsuo
AU - Mochida, Tomoyuki
AU - Kagoshima, Seiichi
AU - Iwasa, Yoshihiro
AU - Hiraki, Ko Ichi
AU - Takahashi, Toshihiro
PY - 2001/10
Y1 - 2001/10
N2 - Low-temperature electronic properties of the first all-organic donor-acceptor-type superconducting system, (BETS)2(X2TCNQ) [X=Cl, Br] under high pressure have been investigated by means of resistivity and 1H NMR experiments. The crystal structure of this class of complexes is characterized by a twin-columnar structure of BETS without intra-columnar dimerization at room temperature. Pressure-temperature phase diagrams are established for these compounds, where the electronic ground states are spin-density-wave (SDW's) insulators, except a narrow region of superconducting state in (BETS)2(Cl2TCNQ). A possible unified picture of the electronic states of the title compounds is discussed in terms of hydrostatic pressure effects and chemical substitution ones on them.
AB - Low-temperature electronic properties of the first all-organic donor-acceptor-type superconducting system, (BETS)2(X2TCNQ) [X=Cl, Br] under high pressure have been investigated by means of resistivity and 1H NMR experiments. The crystal structure of this class of complexes is characterized by a twin-columnar structure of BETS without intra-columnar dimerization at room temperature. Pressure-temperature phase diagrams are established for these compounds, where the electronic ground states are spin-density-wave (SDW's) insulators, except a narrow region of superconducting state in (BETS)2(Cl2TCNQ). A possible unified picture of the electronic states of the title compounds is discussed in terms of hydrostatic pressure effects and chemical substitution ones on them.
KW - Metal-insulator transition
KW - Organic superconductor
KW - Superconducting transition
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U2 - 10.1143/JPSJ.70.3023
DO - 10.1143/JPSJ.70.3023
M3 - Article
AN - SCOPUS:0035632870
VL - 70
SP - 3023
EP - 3030
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 10
ER -