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Title: Quasiparticle dynamics across the full Brillouin zone of Bi 2Sr 2CaCu 2O 8+δ traced with ultrafast time and angle-resolved photoemission spectroscopy

A hallmark in the cuprate family of high-temperature superconductors is the nodal-antinodal dichotomy. In this regard, angle-resolved photoemission spectroscopy (ARPES) has proven especially powerful, providing band structure information directly in energy-momentum space. Time-resolved ARPES (trARPES) holds great promise of adding ultrafast temporal information, in an attempt to identify different interaction channels in the time domain. Previous studies of the cuprates using trARPES were handicapped by the low probing energy which significantly limits the accessible momentum space. Using 20.15eV, 12 fs pulses we show for the first time the evolution of quasiparticles in the antinodal region of Bi 2Sr 2CaCu 2O 8+δ and demonstrate that nonmonotonic relaxation dynamics dominates above a certain fluence threshold. The dynamics is heavily influenced by transient modification of the electron-phonon interaction and phase space restrictions, in severe contrast to the monotonic relaxation in the nodal and off-nodal regions.
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [1] ;  [6] ;  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies (CINT)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Condensed Matter and Magnet Science, Materials Physics and Applications Division;
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Physics of Condensed Matter and Complex Systems, Theoretical Division
  4. Temple University, Philadelphia, PA (United States). Department of Physics
  5. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science
  6. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Materials Physics and Applications
Publication Date:
Report Number(s):
BNL-111754-2016-JA; LA-UR-15-27700
Journal ID: ISSN 2329-7778; SDTYAE; R&D Project: PO010; KC0201060
Grant/Contract Number:
SC00112704; AC52-06NA25396; AC02-98CH10886; AC02-76SF0051
Accepted Manuscript
Journal Name:
Structural Dynamics
Additional Journal Information:
Journal Volume: 2; Journal Issue: 5; Journal ID: ISSN 2329-7778
American Crystallographic Association/AIP
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; femtosecond dynamics; photoexcitations; photons; band structure; Brillouin scattering; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 36 MATERIALS SCIENCE; material science
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1260542; OSTI ID: 1321767