Strong anharmonic H(D) vibrations in the δ-phase of titanium hydride: observation of bound multiphonon states

A. I. Kolesnikov, I. O. Bashkin, V. Yu Malyshev, E. G. Ponyatovsky, M. Prager, J. Tomkinson

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Abstract

Neutron spectroscopy shows that the fundamental optical band of H(D) vibrations in the ordered monohydride phase, δ-TiH, is split into two peaks. Biphonon and triphonon excitations were clearly observed as distinct peaks separated from two-phonon and three-phonon bands to lower energies. These effects seem to be due to strong H-H interaction along the crystal c-axis.

Original languageEnglish
Pages (from-to)284-286
Number of pages3
JournalPhysica B: Physics of Condensed Matter
Volume180-181
Issue numberPART 1
DOIs
StatePublished - Jun 2 1992
Externally publishedYes

Funding

We are pleased to thank the SERC for access to the ISIS pulsed neutron source; one of us (A.I.K.) thanks the Alexander von Humboldt Foundation for the research grant. Thanks are also due to Dr. V.G. Glebov-sky for vacuum melting of titanium and to Profs. E.I. Rashba, 1.1. Lalov and O.A. Dubovsky for helpful discussions.

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