Long‐Wavelength Optical Phonons in K 1− x  Tl  x  Cl and K 1− x  Tl  x  Br Mixed Crystals | Zendy

Bauhofer W. | Zendy; Genzel L. | Zendy

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Long‐Wavelength Optical Phonons in K 1− x Tl x Cl and K 1− x Tl x Br Mixed Crystals

Author(s) -

Bauhofer W.,

Genzel L.

Publication year - 1974

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.2220620204

Subject(s) - phonon , lattice vibration , physics , infrared , lattice (music) , reflectivity , wavelength , condensed matter physics , crystallography , analytical chemistry (journal) , chemistry , optics , chromatography , acoustics

The q ≈ 0 lattice vibrations of mixed crystals of K 1− x Tl x Cl and K 1− x Tl x Br have been observed by far infrared reflectivity measurements. Contrary to the existing assumption, the system K 1− x Tl x Cl clearly shows a mixed‐mode behaviour similar to that of K 1− x Rb x I. K 1− x Tl x Br is either a mixed‐ or a two‐mode system. The experimental results are in good agreement with a modified version of the REI‐model.

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