C-60 ORIENTATIONAL ORDERING IN SUPERCONDUCTING NA2RBC60

被引：59

作者：

KNIAZ, K

FISCHER, JE

ZHU, Q

ROSSEINSKY, MJ

ZHOU, O

MURPHY, DW

机构：

[1] UNIV PENN,RES STRUCT MATTER LAB,PHILADELPHIA,PA 19104

[2] AT&T BELL LABS,MURRAY HILL,NJ 07974

来源：

SOLID STATE COMMUNICATIONS | 1993年 / 88卷 / 01期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0038-1098(93)90767-H

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Rietveld refinements of x-ray powder profiles show that the C60 molecules in Na2RbC60 are orientationally ordered in a manner essentially the same as in pure C60, the only fullerene-based superconductor thus far to do so. Fits to data at both 300 K and 27 K are significantly better in space group Pa3BAR (simple cubic) than in Fm3mBAR (merohedral disorder) or by assuming uniform spherical shells of charge (complete disorder). The anomalously low T(c) of this compound cannot be attributed to excess orientational disorder, and therefore remains a mystery.

引用

页码：47 / 50

页数：4

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