Ordered low-temperature structure in (formula presented) detected by infrared spectroscopy

K. Kamarás, G. Klupp, D. B. Tanner, A. F. Hebard, N. M. Nemes, J. E. Fischer

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Infrared spectra of a (formula presented) single-phase thin film have been measured between room temperature and 20 K. At low temperatures, the two high-frequency (formula presented) modes appear as triplets, indicating a static (formula presented) crystal-field stabilized Jahn-Teller distortion of the (formula presented) anions. The (formula presented) mode changes into a known doublet above 250 K, a pattern which could have three origins: a dynamic Jahn-Teller effect, static disorder between “staggered” anions, or a phase transition from an orientationally ordered phase to one where molecular motion is significant.

Original languageEnglish
Pages (from-to)1-4
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number5
DOIs
Publication statusPublished - Jan 1 2002

Fingerprint

Jahn-Teller effect
Anions
Infrared spectroscopy
Negative ions
infrared spectroscopy
Phase transitions
Infrared radiation
Thin films
Temperature
Crystals
anions
crystal field theory
infrared spectra
disorders
room temperature
thin films

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Ordered low-temperature structure in (formula presented) detected by infrared spectroscopy. / Kamarás, K.; Klupp, G.; Tanner, D. B.; Hebard, A. F.; Nemes, N. M.; Fischer, J. E.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 65, No. 5, 01.01.2002, p. 1-4.

Research output: Contribution to journalArticle

Kamarás, K. ; Klupp, G. ; Tanner, D. B. ; Hebard, A. F. ; Nemes, N. M. ; Fischer, J. E. / Ordered low-temperature structure in (formula presented) detected by infrared spectroscopy. In: Physical Review B - Condensed Matter and Materials Physics. 2002 ; Vol. 65, No. 5. pp. 1-4.
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