Imaging the Fano lattice to ‘hidden order’ transition in URu2Si2

A. R. Schmidt, M. H. Hamidian, P. Wahl, F. Meier, A. V. Balatsky, J. D. Garrett, T. J. Williams, G. M. Luke and J. C. Davis ()
Additional contact information
A. R. Schmidt: Laboratory for Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA
M. H. Hamidian: Laboratory for Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA
P. Wahl: Laboratory for Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA
F. Meier: Laboratory for Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA
A. V. Balatsky: Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
J. D. Garrett: Brockhouse Institute for Materials Research, McMaster University, Hamilton, Ontario, L85 4M1, Canada
T. J. Williams: McMaster University, Hamilton, Ontario, L8S 4M1, Canada
G. M. Luke: McMaster University, Hamilton, Ontario, L8S 4M1, Canada
J. C. Davis: Laboratory for Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA

Nature, 2010, vol. 465, issue 7298, 570-576

Abstract: Abstract Within a Kondo lattice, the strong hybridization between electrons localized in real space (r-space) and those delocalized in momentum-space (k-space) generates exotic electronic states called ‘heavy fermions’. In URu2Si2 these effects begin at temperatures around 55 K but they are suddenly altered by an unidentified electronic phase transition at To = 17.5 K. Whether this is conventional ordering of the k-space states, or a change in the hybridization of the r-space states at each U atom, is unknown. Here we use spectroscopic imaging scanning tunnelling microscopy (SI-STM) to image the evolution of URu2Si2 electronic structure simultaneously in r-space and k-space. Above To, the ‘Fano lattice’ electronic structure predicted for Kondo screening of a magnetic lattice is revealed. Below To, a partial energy gap without any associated density-wave signatures emerges from this Fano lattice. Heavy-quasiparticle interference imaging within this gap reveals its cause as the rapid splitting below To of a light k-space band into two new heavy fermion bands. Thus, the URu2Si2 ‘hidden order’ state emerges directly from the Fano lattice electronic structure and exhibits characteristics, not of a conventional density wave, but of sudden alterations in both the hybridization at each U atom and the associated heavy fermion states.

Date: 2010
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/nature09073 Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:nature:v:465:y:2010:i:7298:d:10.1038_nature09073

Ordering information: This journal article can be ordered from
https://www.nature.com/

DOI: 10.1038/nature09073

Access Statistics for this article

Nature is currently edited by Magdalena Skipper

More articles in Nature from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().