Journal
PHYSICAL REVIEW LETTERS
Volume 110, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.186401
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Funding
- National Science Foundation through a CAREER Award [DMR-0847385]
- Materials Research Science and Engineering Centers program [DMR-1120296]
- Research Corporation Cottrell Scholars Award [20025]
- DFG through the Emmy-Noether program [GE1647/2-1]
- National Science Foundation [DGE-0707428]
- NSF IGERT [DGE-0654193]
- NSERC
- Canadian Institute for Advanced Research
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [847385] Funding Source: National Science Foundation
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We present high-resolution angle-resolved photoemission spectra of the heavy-fermion superconductor URu2Si2. Detailed measurements as a function of both photon energy and temperature allow us to disentangle a variety of spectral features, revealing the evolution of the low-energy electronic structure across the hidden order transition. Above the transition, our measurements reveal the existence of weakly dispersive states that exhibit a large scattering rate and do not appear to shift from above to below the Fermi level, as previously reported. Upon entering the hidden order phase, these states rapidly hybridize with light conduction band states and transform into a coherent heavy fermion liquid, coincident with a dramatic drop in the scattering rate. This evolution is in stark contrast with the gradual crossover expected in Kondo lattice systems, which we attribute to the coupling of the heavy fermion states to the hidden order parameter.
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