Ultrafast quenching of electron–boson interaction and superconducting gap in a cuprate superconductor

Wentao Zhang, Choongyu Hwang, Christopher L. Smallwood, Tristan L. Miller, Gregory Affeldt, Koshi Kurashima, Chris Jozwiak, Hiroshi Eisaki, Tadashi Adachi, Yoji Koike, Dung-Hai Lee and Alessandra Lanzara ()
Additional contact information
Wentao Zhang: Lawrence Berkeley National Laboratory
Choongyu Hwang: Lawrence Berkeley National Laboratory
Christopher L. Smallwood: Lawrence Berkeley National Laboratory
Tristan L. Miller: Lawrence Berkeley National Laboratory
Gregory Affeldt: Lawrence Berkeley National Laboratory
Koshi Kurashima: Tohoku University
Chris Jozwiak: Advanced Light Source, Lawrence Berkeley National Laboratory
Hiroshi Eisaki: Electronics and Photonics Research Institute, National Institute of Advanced Industrial Science and Technology
Tadashi Adachi: Tohoku University
Yoji Koike: Tohoku University
Dung-Hai Lee: University of California Berkeley
Alessandra Lanzara: Lawrence Berkeley National Laboratory

Nature Communications, 2014, vol. 5, issue 1, 1-6

Abstract: Abstract Ultrafast spectroscopy is an emerging technique with great promise in the study of quantum materials, as it makes it possible to track similarities and correlations that are not evident near equilibrium. Thus far, however, the way in which these processes modify the electron self-energy—a fundamental quantity describing many-body interactions in a material—has been little discussed. Here we use time- and angle-resolved photoemission to directly measure the ultrafast response of self-energy to near-infrared photoexcitation in high-temperature cuprate superconductor. Below the critical temperature of the superconductor, ultrafast excitations trigger a synchronous decrease of electron self-energy and superconducting gap, culminating in a saturation in the weakening of electron–boson coupling when the superconducting gap is fully quenched. In contrast, electron–boson coupling is unresponsive to ultrafast excitations above the critical temperature of the superconductor and in the metallic state of a related material. These findings open a new pathway for studying transient self-energy and correlation effects in solids.

Date: 2014
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/ncomms5959 Abstract (text/html)

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:natcom:v:5:y:2014:i:1:d:10.1038_ncomms5959

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

DOI: 10.1038/ncomms5959

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

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