期刊
EPL
卷 83, 期 5, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1209/0295-5075/83/57004
关键词
-
资金
- Natural Science Foundation of China
- Ministry of Science and Technology of China [2006CB601000, 2006CB921802, 2006CB921300]
- Chinese Academy of Sciences
We present point-contact spectroscopy data for junctions between a normal metal and the newly discovered F-doped superconductor LaO0.9F0.1-delta FeAs (F-LaOFeAs). A zero-bias conductance peak was observed and its shape and magnitude suggest the presence of Andreev bound states at the surface of F-LaOFeAs, which provides a possible evidence of an unconventional pairing symmetry with a nodal gap function. The maximum gap value Delta(0) approximate to 3.9 +/- 0.7meV was determined from the measured spectra, in good agreement with the recent experiments on specific heat and lower critical field. Copyright (c) EPLA, 2008.
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