H Tunneling and Local Diffusion in NbOxHy View Full Text


Ontology type: schema:Chapter     


Chapter Info

DATE

1986

AUTHORS

H. Wipf , A. Magerl , K. Neumaier

ABSTRACT

The presently best understood example of low-temperature H tunneling in metals is represented by H interstitials in Nb that are trapped (below ~150 K /1,2/) by impurity atoms such as 0 or N. The tunneling behavior has been investigated in a great number of specific heat, ultrasonic (anelastic) and neutron spectroscopic measurements (see e.g. the studies of /3–11/ and references therein). The relevant tunneling process observed in the experiments is most likely to occur between two nearest-neighbor tetrahedral trap sites located in the neighborhood of an 0 or N trap center (for a detailed discussion, see /2,5/). In the temperature range below ~ 5 K, the tunneling matrix element was found to be ~ 0. 2 meV for the isotope H /3,5–7,9/ and ~ 0.02 meV for D /9/. More... »

PAGES

161-164

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-3-642-71007-0_27

DOI

http://dx.doi.org/10.1007/978-3-642-71007-0_27

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1007083318


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