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Bulk electronic structure of the antiferromagnetic superconducting phase in ErNi2B2C

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arxiv 0711.2339 v2 pith:VUMORJDY submitted 2007-11-15 cond-mat.supr-con

Bulk electronic structure of the antiferromagnetic superconducting phase in ErNi2B2C

classification cond-mat.supr-con
keywords phaseantiferromagneticbulkelectronicerni2b2cstructuresuperconductingantiferromagnetism
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We have performed temperature (T) - dependent laser-photoemission spectroscopy of antiferromagnetic (AF) superconductor ErNi2B2C to study the electronic-structure evolution reflecting the interplay between antiferromagnetism and superconductivity. The spectra at the superconducting (SC) phase show a very broad spectral shape. T-dependent SC gap shows a sudden deviation from the BCS prediction just below TN. This observation can be well explained by the theoretical model and thus represents characteristic bulk electronic structure of the AF SC phase for the first time.

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