Atomic resolution mapping of the excited-state electronic structure of Cu2 O with time-resolved x-ray absorption spectroscopy

P. W. Hillyard, S. V N T Kuchibhatla, T. E. Glover, M. P. Hertlein, N. Huse, P. Nachimuthu, L. V. Saraf, S. Thevuthasan, K. J. Gaffney

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We have used time-resolved soft x-ray spectroscopy to investigate the electronic structure of optically excited cuprous oxide at the OK edge and the Cu L3 edge. The 400 nm optical excitation shifts the Cu and O absorptions to lower energy, but does not change the integrated x-ray absorption significantly for either edge. The constant integrated x-ray absorption cross-section indicates that the conduction-band and valence-band edges have very similar Cu3d and O2p orbital contributions. The 2.1 eV optical band gap of Cu2 O significantly exceeds the one eV shift in the Cu L3 - and OK -edges absorption edges induced by optical excitation, demonstrating the importance of core-hole excitonic effects and valence electron screening in the x-ray absorption process.

Original languageEnglish
Article number125210
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number12
DOIs
Publication statusPublished - 29 Sep 2009
Externally publishedYes

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Absorption spectroscopy
x ray absorption
Excited states
x ray spectroscopy
Electronic structure
absorption spectroscopy
electronic structure
X rays
Photoexcitation
excitation
Optical band gaps
Valence bands
Conduction bands
valence
Screening
shift
Spectroscopy
absorption cross sections
Oxides
Electrons

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Hillyard, P. W., Kuchibhatla, S. V. N. T., Glover, T. E., Hertlein, M. P., Huse, N., Nachimuthu, P., ... Gaffney, K. J. (2009). Atomic resolution mapping of the excited-state electronic structure of Cu2 O with time-resolved x-ray absorption spectroscopy. Physical Review B - Condensed Matter and Materials Physics, 80(12), [125210]. https://doi.org/10.1103/PhysRevB.80.125210

Atomic resolution mapping of the excited-state electronic structure of Cu2 O with time-resolved x-ray absorption spectroscopy. / Hillyard, P. W.; Kuchibhatla, S. V N T; Glover, T. E.; Hertlein, M. P.; Huse, N.; Nachimuthu, P.; Saraf, L. V.; Thevuthasan, S.; Gaffney, K. J.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 80, No. 12, 125210, 29.09.2009.

Research output: Contribution to journalArticle

Hillyard, PW, Kuchibhatla, SVNT, Glover, TE, Hertlein, MP, Huse, N, Nachimuthu, P, Saraf, LV, Thevuthasan, S & Gaffney, KJ 2009, 'Atomic resolution mapping of the excited-state electronic structure of Cu2 O with time-resolved x-ray absorption spectroscopy', Physical Review B - Condensed Matter and Materials Physics, vol. 80, no. 12, 125210. https://doi.org/10.1103/PhysRevB.80.125210
Hillyard, P. W. ; Kuchibhatla, S. V N T ; Glover, T. E. ; Hertlein, M. P. ; Huse, N. ; Nachimuthu, P. ; Saraf, L. V. ; Thevuthasan, S. ; Gaffney, K. J. / Atomic resolution mapping of the excited-state electronic structure of Cu2 O with time-resolved x-ray absorption spectroscopy. In: Physical Review B - Condensed Matter and Materials Physics. 2009 ; Vol. 80, No. 12.
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