POSSIBLE OBSERVATION OF A LUTTINGER-LIQUID BEHAVIOR FROM PHOTOEMISSION SPECTROSCOPY OF ONE-DIMENSIONAL ORGANIC CONDUCTORS

被引:127
作者
DARDEL, B
MALTERRE, D
GRIONI, M
WEIBEL, P
BAER, Y
VOIT, J
JEROME, D
机构
[1] INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE
[2] UNIV PARIS 11,PHYS SOLIDES LAB,F-91405 ORSAY,FRANCE
来源
EUROPHYSICS LETTERS | 1993年 / 24卷 / 08期
关键词
D O I
10.1209/0295-5075/24/8/011
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
High-resolution photoemission experiments have been carried out on one-dimensional organic conductors in their normal state. In contrast to usual metals, the spectral function vanishes at the Fermi level and no Fermi edge is detectable. These results are consistent with a Luttinger description and an exponent alpha of the spectral function at the Fermi level larger than 1 is found. This result corroborates recent nuclear-magnetic-resonance experiments. Such a large correlation exponent shows that the 1D Hubbard model is not appropriate and strong long-range interactions must be assumed to play an important role in these materials. The compatibility with other correlation functions is discussed.
引用
收藏
页码:687 / 692
页数:6
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