Journal article
+ 1 other files
Clocking the onset of bilayer coherence in a high-${T}_{c}$ cuprate
-
Baldini, Edoardo
Laboratory for Ultrafast Microscopy and Electron Scattering, IPHYS, EPFL, Lausanne, Switzerland - Laboratory of Ultrafast Spectroscopy, ISIC, EPFL, Lausanne, Switzerland
-
Mann, Andreas
Laboratory for Ultrafast Microscopy and Electron Scattering, IPHYS, EPFL, Lausanne, Switzerland
-
Mallett, Benjamin P. P.
Department of Physics, University of Fribourg, Switzerland
-
Arrell, Christopher
Laboratory of Ultrafast Spectroscopy, ISIC, EPFL, Lausanne, Switzerland
-
Mourik, Frank van
Laboratory of Ultrafast Spectroscopy, ISIC, EPFL, Lausanne, Switzerland
-
Wolf, Thomas
Institute of Solid State Physics, Karlsruhe Institute of Technology, Karlsruhe 76021, Germany
-
Mihailovic, Dragan
Jozef Stefan Institute and International Postgraduate School, Ljubljana, Slovenia
-
Tallon, Jeffrey L.
Robinson Research Institute, Victoria University of Wellington, Lower Hutt, New Zealand
-
Bernhard, Christian
Department of Physics, University of Fribourg, Switzerland
-
Lorenzana, José
Institute for Complex Systems - CNR, and Physics Department, University of Rome “La Sapienza”, Italy
-
Carbone, Fabrizio
Laboratory for Ultrafast Microscopy and Electron Scattering, IPHYS, EPFL, Lausanne, Switzerland
Show more…
Published in:
- Physical Review B. - 2017, vol. 95, no. 2, p. 024501
English
In cuprates, a precursor state of superconductivity is speculated to exist above the critical temperature TC. Here we show via a combination of far-infrared ellipsometry and ultrafast broadband optical spectroscopy that signatures of such a state can be obtained via three independent observables in an underdoped sample of NdBa2Cu3O6+δ. The pseudogap correlations were disentangled from the response of laser-broken pairs by clocking their characteristic time scales. The onset of a superconducting precursor state was found at a temperature TONS>TC, consistent with the temperature scale identified via static optical spectroscopy. Furthermore, the temperature evolution of the coherent vibration of the Ba ion, strongly renormalized by the onset of superconductivity, revealed a pronounced anomaly at the same temperature TONS. The microscopic nature of such a precursor state is discussed in terms of preformed pairs and enhanced bilayer coherence.
-
Faculty
- Faculté des sciences et de médecine
-
Department
- Département de Physique
-
Language
-
-
Classification
-
Physics
-
License
-
License undefined
-
Identifiers
-
-
Persistent URL
-
https://folia.unifr.ch/unifr/documents/305382
Other files
Statistics
Document views: 44
File downloads:
- ber_cob.pdf: 78
- ber_cob_sm.pdf: 80