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Title: Direct time-domain observation of attosecond final-state lifetimes in photoemission from solids

Attosecond spectroscopic techniques have made it possible to measure differences in transport times for photoelectrons from localized core levels and delocalized valence bands in solids. Here, we report the application of attosecond pulse trains to directly and unambiguously measure the difference in lifetimes between photoelectrons born into free electron–like states and those excited into unoccupied excited states in the band structure of nickel (111). An enormous increase in lifetime of 212 ± 30 attoseconds occurs when the final state coincides with a short-lived excited state. Moreover, a strong dependence of this lifetime on emission angle is directly related to the final-state band dispersion as a function of electron transverse momentum. Our finding underscores the importance of the material band structure in determining photoelectron lifetimes and corresponding electron escape depths.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [2] ;  [1] ;  [1]
  1. Univ. of Colorado, Boulder, CO (United States). Dept. of Physics and JILA
  2. Univ. of Wisconsin, Madison, WI (United States). Dept. of Chemical and Biological Engineering
  3. National Inst. of Standards and Technology (NIST), Boulder, CO (United States)
Publication Date:
Grant/Contract Number:
FG02-05ER15731
Type:
Accepted Manuscript
Journal Name:
Science
Additional Journal Information:
Journal Volume: 353; Journal Issue: 6294; Journal ID: ISSN 0036-8075
Publisher:
AAAS
Research Org:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1396169

Tao, Z., Chen, C., Szilvasi, T., Keller, M., Mavrikakis, M., Kapteyn, H., and Murnane, M.. Direct time-domain observation of attosecond final-state lifetimes in photoemission from solids. United States: N. p., Web. doi:10.1126/science.aaf6793.
Tao, Z., Chen, C., Szilvasi, T., Keller, M., Mavrikakis, M., Kapteyn, H., & Murnane, M.. Direct time-domain observation of attosecond final-state lifetimes in photoemission from solids. United States. doi:10.1126/science.aaf6793.
Tao, Z., Chen, C., Szilvasi, T., Keller, M., Mavrikakis, M., Kapteyn, H., and Murnane, M.. 2016. "Direct time-domain observation of attosecond final-state lifetimes in photoemission from solids". United States. doi:10.1126/science.aaf6793. https://www.osti.gov/servlets/purl/1396169.
@article{osti_1396169,
title = {Direct time-domain observation of attosecond final-state lifetimes in photoemission from solids},
author = {Tao, Z. and Chen, C. and Szilvasi, T. and Keller, M. and Mavrikakis, M. and Kapteyn, H. and Murnane, M.},
abstractNote = {Attosecond spectroscopic techniques have made it possible to measure differences in transport times for photoelectrons from localized core levels and delocalized valence bands in solids. Here, we report the application of attosecond pulse trains to directly and unambiguously measure the difference in lifetimes between photoelectrons born into free electron–like states and those excited into unoccupied excited states in the band structure of nickel (111). An enormous increase in lifetime of 212 ± 30 attoseconds occurs when the final state coincides with a short-lived excited state. Moreover, a strong dependence of this lifetime on emission angle is directly related to the final-state band dispersion as a function of electron transverse momentum. Our finding underscores the importance of the material band structure in determining photoelectron lifetimes and corresponding electron escape depths.},
doi = {10.1126/science.aaf6793},
journal = {Science},
number = 6294,
volume = 353,
place = {United States},
year = {2016},
month = {6}
}

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