DO THE INTRAMOLECULAR C = C STRETCHING VIBRATIONAL-MODES IN ET MEDIATE ELECTRON-PAIRING IN KAPPA-(ET)2X SUPERCONDUCTORS

被引：22

作者：

KINI, AM ^{[1
]}

DUDEK, JD ^{[1
]}

CARLSON, KD ^{[1
]}

GEISER, U ^{[1
]}

KLEMM, RA ^{[1
]}

WILLIAMS, JM ^{[1
]}

LYKKE, KR ^{[1
]}

SCHLUETER, JA ^{[1
]}

WANG, HH ^{[1
]}

WURZ, P ^{[1
]}

FERRARO, JR ^{[1
]}

YACONI, GA ^{[1
]}

STOUT, P ^{[1
]}

机构：

[1] BIORAD,DIGILAB DIV,CAMBRIDGE,MA 02137

来源：

PHYSICA C | 1993年 / 204卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(93)91026-R

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Isotopic labelling (C-13) of all six double-bonded carbon atoms in bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF or ET), which results in large shifts (56-67 cm-1) in the frequencies of intramolecular a(g) modes at approximately 1500 cm-1, is found to lead to no measurable isotope effect on T(c) in the high-T(c) ambient pressure organic superconductors kappa-(ET)2Cu(NCS)2 (T(c) = 10.4 K) and kappa-(ET)2CU[N(CN)2]Br (T(c) = 11.6 K). Thus, the intramolecular C=C stretching vibrational modes in ET at energies near 1500 cm-1 are not dominant mediators of superconducting pairing in these molecular superconductors.

引用

页码：399 / 405

页数：7

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