Proton tunneling

A decay channel of the O-H stretch mode in KTaO3

E. J. Spahr, L. Wen, M. Stavola, L. A. Boatner, Leonard C Feldman, N. H. Tolk, G. Lüpke

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The vibrational lifetimes of the O-H and O-D stretch modes in the perovskite oxide KTaO3 are measured by pump-probe infrared spectroscopy. Both stretch modes are exceptionally long lived and exhibit a large "reverse" isotope effect, due to a phonon-assisted proton-tunneling process, which involves the O-Ta-O bending motion. The excited-state tunneling rate is found to be 7 orders of magnitude larger than from the ground state in the proton conducting oxide, BaCeO3.

Original languageEnglish
Article number075506
JournalPhysical Review Letters
Volume102
Issue number7
DOIs
Publication statusPublished - Feb 20 2009

Fingerprint

protons
oxides
decay
isotope effect
infrared spectroscopy
pumps
conduction
life (durability)
ground state
probes
excitation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Spahr, E. J., Wen, L., Stavola, M., Boatner, L. A., Feldman, L. C., Tolk, N. H., & Lüpke, G. (2009). Proton tunneling: A decay channel of the O-H stretch mode in KTaO3. Physical Review Letters, 102(7), [075506]. https://doi.org/10.1103/PhysRevLett.102.075506

Proton tunneling : A decay channel of the O-H stretch mode in KTaO3. / Spahr, E. J.; Wen, L.; Stavola, M.; Boatner, L. A.; Feldman, Leonard C; Tolk, N. H.; Lüpke, G.

In: Physical Review Letters, Vol. 102, No. 7, 075506, 20.02.2009.

Research output: Contribution to journalArticle

Spahr, EJ, Wen, L, Stavola, M, Boatner, LA, Feldman, LC, Tolk, NH & Lüpke, G 2009, 'Proton tunneling: A decay channel of the O-H stretch mode in KTaO3', Physical Review Letters, vol. 102, no. 7, 075506. https://doi.org/10.1103/PhysRevLett.102.075506
Spahr, E. J. ; Wen, L. ; Stavola, M. ; Boatner, L. A. ; Feldman, Leonard C ; Tolk, N. H. ; Lüpke, G. / Proton tunneling : A decay channel of the O-H stretch mode in KTaO3. In: Physical Review Letters. 2009 ; Vol. 102, No. 7.
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