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Pressure-Tuned Point-Contact Spectroscopy of URu2Si2 from Hidden Order to Antiferromagnetic States: Similarity of the Fermi Surface Gapping

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arxiv 1112.5669 v1 pith:R7WO5G5K submitted 2011-12-23 cond-mat.str-el

Xin Lu , F. Ronning , P. H. Tobash , K. Gofryk , E. D. Bauer , J. D. Thompson This is my paper · ORCID
classification cond-mat.str-el
keywords statefermilmaforderspectroscopystatesantiferromagneticgapping
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We report soft point-contact spectroscopy studies of URu2Si2 both in the hidder order (HO) and the large-moment antiferromagnetic (LMAF) states accessed by pressure. In the HO state at ambient pressure, the spectroscopy shows two asymmetric peaks around the Fermi energy that emerge below the hidden order temperature T_{HO}. In the LMAF state at higher pressures, the spectra are remarkably similar to those in the HO state, indicating a similar Fermi surface gapping in the HO and LMAF states and providing a new clue to unraveling the puzzling HO state.

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