Infrared Vibrational Absorption by U‐Centers in NaI

Bäuerle, D.; Fritz, B.

doi:10.1002/pssb.19670240120

Cited by 14 publications

(1 citation statement)

References 12 publications

(7 reference statements)

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“…However, this oversimplified model yields a crowd of predictions and relations between the different color center absorption bands, most of which tum out to be in [3,5,6,11,15,18,20].) [1,11,12,14,16,17,[19][20][21].) fair agreement with expérimental results.…”

supporting

confidence: 55%

On the analogy between local modes and color center absorption bands

Hoffmann¹

1980

J. Phys. France

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The absorption and emission bands of F aggregate centers are compared with the local modes of H- and D- ions substituting the halogen ions in alkali halides. It is shown that the energies of the band maxima of F aggregate centers are proportional to the local vibrational mode energies of the H- or D- ions. Because of these correlations, the bands of the F aggregate centers are considered to be due to the excitation of local harmonic oscillators. From this simple picture — how oversimplified it may be — a series of predictions can be drawn, which are in fair agreement with experiment

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supporting

confidence: 55%

On the analogy between local modes and color center absorption bands

Hoffmann¹

1980

J. Phys. France

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The Effect of the Local Mode Self‐Energy in the U‐Center Sidebands

Zeyher

Bilz

1969

Physica Status Solidi (b)

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The theory of the sideband absorption of the U-center is reformulated. The contribution of the anharmonic self-energy of the local mode is taken into account in the resonance denominator and in the sideband absorption itself. The first modification explains some difficulties in describing peak positions and heights arising in the usual perturbation treatment. The second effect is a simple form of final state interaction which leads to an absorption in the gap region of the sideband. Numerical values of the effects are given.Bei der Absorption durch U-Zentren wird die anharmonische Selbstenergie der lokalisierten Schwingung betrachtet. Die Mitnahme der Selbstenergie im Resonanznenner verandert die Lage und Hiihe der Maxima in der Seitenbande. Die Berucksichtigung der Selbstenergie in der Seitenbande selbst stellt eine Wechselwirkung der Phononenendzustande dar und fuhrt zu einer endlichen Absorption in der Bandlucke. Numerische Werte fur die verschiedenen Effekte werden angegeben.

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