Formation of the coherent heavy fermion liquid at the 'hidden order' transition in URu2Si2

Shouvik Chatterjee; Jan Trinckauf; Torben Hanke; Daniel E. Shai; John W. Harter; Travis J. Williams; Graeme M. Luke; Kyle M. Shen; Jochen Geck

doi:10.1103/PhysRevLett.110.186401

paper

Formation of the coherent heavy fermion liquid at the 'hidden order' transition in URu2Si2

arXiv:1211.5312 · doi:10.1103/PhysRevLett.110.186401

Abstract

In this article we present high-resolution angle-resolved photoemission (ARPES) spectra of the heavy-fermion superconductor URu $_{2}$ Si $_{2}$ . Measurements as a function of both excitation 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. Already above the hidden order transition our measurements reveal the existence of weakly dispersive states below the Fermi level that exhibit a large scattering rate. Upon entering the hidden order phase, these states transform into a coherent heavy fermion liquid that hybridizes with the conduction bands.

arXiv comment5 pages, 4 figures

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