Speaker
Alexander Balatsky
(Los Alamos National Laboratory)
Description
Alexander Balatsky1, Jason Haraldsen1, Yoni Dubi2, Jian Xin Zhu3, Peter Wolfle4 and Matthias Graf3
1 Center for Integrated Nanotechnologies, LANL, USA
2 Center for Integrated Nanotechnologies, LANL, Israel
3 Theory division, LANL, USA
4 Institute for Theory of Condensed Matter and Center for Functional Nanostructures, Karlsruhe Germany, Germany
URu2Si2 proved to be a compound that has exhibited similarities with other correlated materials like HighTc oxides in that it has strong correlations, competing phases and intense nanoscale inhomogeneity in Kondo lattice. We point out that Hidden order transition is not a mean field transition, in contrast to prevailing discussion to date. Iit has significant precursor effects, so called pseudogap. Through an analysis and modeling of data from various experimental techniques, we present evidence for the presence of a hidden order pseudogap in URu2Si2 in the temperature range between 25 K and 17.5 K. We evaluate the effects that gap fluctuations would produce on observables like tunneling conductance, neutron scattering and nuclear resonance, and relate them to the experimental findings. We show that the transition into hidden order phase is preceded by the onset of non-coherent hidden order fluctuations. We also discuss nanoscale inhomogeneity seen in URu2Si2 with STM as an evidence for hybridization modulation due to local defects and discuss the role of hybridization modulations in Hidden Order.
Hidden order pseudogap in URu$_2$Si$_2$, J. Haraldsen, 10.1103/PhysRevB.84.214410 (2011) Electronic inhomogeneity in a Kondo lattice, E. Bauer et al, PNAS 108, 6857 (2011) How Kondo Holes Create Intense Nanoscale Heavy-Fermion Hybridization Disorder,PNAS 2011 108 (45) 18233-18237; published ahead of print October 17, 2011, doi:10.1073/pnas.1115027108 Anomalous femtosecond quasiparticle dynamics of hidden order state in URu2Si2 Georgi L. Dakovski et al, Phys. Rev. B 84, 161103 (2011) Hybridization Wave as the “Hidden Order” in URu2Si2, Y. Dubi et al, Phys. Rev. Lett. 106, 086401 (2011) Incommensurate spin resonance in URu2Si2, A. V. Balatsky, et al, Phys. Rev. B 79, 214413
Primary author
Alexander Balatsky
(Los Alamos National Laboratory)
