skip to main content


Title: Energy dissipation from a correlated system driven out of equilibrium

We report that in complex materials various interactions have important roles in determining electronic properties. Angle-resolved photoelectron spectroscopy (ARPES) is used to study these processes by resolving the complex single-particle self-energy and quantifying how quantum interactions modify bare electronic states. However, ambiguities in the measurement of the real part of the self-energy and an intrinsic inability to disentangle various contributions to the imaginary part of the self-energy can leave the implications of such measurements open to debate. Here we employ a combined theoretical and experimental treatment of femtosecond time-resolved ARPES (tr-ARPES) show how population dynamics measured using tr-ARPES can be used to separate electron–boson interactions from electron–electron interactions. In conclusion, we demonstrate a quantitative analysis of a well-defined electron–boson interaction in the unoccupied spectrum of the cuprate Bi 2Sr 2CaCu 2O 8+x characterized by an excited population decay time that maps directly to a discrete component of the equilibrium self-energy not readily isolated by static ARPES experiments.
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [2] ;  [2] ;  [2] ;  [6] ;  [6] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ; ORCiD logo [2]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Univ. Duisburg-Essen, Duisburg (Germany). Faculty of Physics and Center for Nanointegration Duisburg-Essen
  3. North Carolina State Univ., Raleigh, NC (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. Univ. of Bonn (Germany). Helmholtz Inst. for Radiation and Nuclear Physics (HISKP); Max Planck Inst. for the Structure and Dynamics of Matter, Hamburg (Germany). Center for Free Electron Laser Science
  5. Georgetown Univ., Washington, DC (United States)
  6. National Inst. of Advanced Industrial Science and Technology, Tsukuba (Japan)
Publication Date:
Report Number(s):
Journal ID: ISSN 2041-1723; R&D Project: PO016; PO010; KC0202020; KC0201060
Grant/Contract Number:
SC0012704; AC02-05CH11231; FG02-08ER46542; PR-2011-0003; 2009-BNL-PM015; 280555
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 7; Journal ID: ISSN 2041-1723
Nature Publishing Group
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); European Union (EU)
Country of Publication:
United States
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Electronic properties and materials; Superconducting properties and materials
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1411564