Journal
PHYSICAL REVIEW B
Volume 88, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.88.094436
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Funding
- UC Lab Research Fee Program
- NNSA through US DOE [DE-FG52-09NA29464]
- Center for Integrated Nanotechnologies, an Office of Science User Facility
- US DOE Office of Science [DE-AC52-06NA25396]
- Nordita
- Alexander von Humboldt foundation
- US Department of Energy [DE-FG02-04ER46105]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1005393] Funding Source: National Science Foundation
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We report Si-29 nuclear magnetic resonance measurements in single crystals and aligned powders of URu2Si2 in the hidden order and paramagnetic phases. The spin-lattice relaxation data reveal evidence of pseudospin fluctuations of U moments in the paramagnetic phase. We find evidence for partial suppression of the density of states below 30 K and analyze the data in terms of a two-component spin-fermion model. We propose that this behavior is a realization of a pseudogap between the hidden-order transition T-HO and 30 K. This behavior is then compared to other materials that demonstrate precursor fluctuations in a pseudogap regime above a ground state with long-range order.
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