Abstract
Using a large-N approach, we demonstrate that the differential conductance and quasi-particle interference pattern measured in recent scanning tunneling spectroscopy experiments (A.R. Schmidt et al. Nature 465, 570 (2010); P. Aynajian et al., PNAS 107, 10383 (2010)) in URu2Si2 are consistent with the emergence of a coherent Kondo lattice below its hidden order transition (HOT). Its formation is driven by a significant increase in the quasi-particle lifetime, which could arise from the emergence of a yet unknown order parameter at the HOT.
Highlights
O In this article, we address this question and demonF strate that the experimentally observed dI/dV 9,10 and quasi-particle interference (QPI) pattern[9] below the hidden order transition (HOT) are consistent with the emergence of a coherent Anderson lattice (CAL) and its
The very good quantitative agreement between the theoretical and experimental dI/dV lineshapes and QPI dispersions suggests that the STS data reflect the emergence of a coherent Anderson lattice below the HOT, in agreement with the conclusions reached by Schmidt et al.[9]
We discuss the dI/dV Fano-lineshape observed above the HOT9,10 and its relation to the conduction band observed in QPI9
Summary
Y ON Heavy-fermion materials exhibit a plethora of exciting I phenomena[1] which are believed to arise from the competition between Kondo screening[2] and antiferromagnetic. O In this article, we address this question and demonF strate that the experimentally observed dI/dV 9,10 and QPI pattern[9] below the HOT are consistent with the emergence of a coherent Anderson lattice (CAL) and its. For a translationally invariant system, s(r) = s and χ(r, r′) = χ0 and χ1 for nearest and next-nearest-neighbor sites, respectively This yields a dispersion of the heavy f -band given by χk = −2χ0(cos kx + cos ky) − 4χ1 cos kx cos ky + εf . We note that t(f0), Uf(0) and Uc(f0) are the tunneling amplitude and scattering strengths for the physical f-electron band, respectively[12,13]
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