Influences of thallium-doping on the phase transition and Raman spectra of blue molybdenum bronzes in charge-density-wave state

Journal Article · Wed Jun 10 00:00:00 EDT 1992 · International Journal of Modern Physics B; (United States)

DOI:https://doi.org/10.1142/S0217984992000880· OSTI ID:7201659

Tian, M L; Tian, D C ^[1]; Zhang, M S; Chen, Q; Lin, Z X ^[2]

---

1. Dept. of Physics, Wuhan Univ., Wuhan 430072 (CN)
2. Center for Material Analysis, Nanjing Univ., Nanjing 210008 (CN)

In this paper, temperature dependencies of the Raman spectra of pure K{sub 0.3}MoO{sub 3} and thallium-doped K{sub 0.15}Tl{sub 0.15}MoO{sub 3} blue bronzes are reported. The results showed that in pure bronze the commensurate domains separated by discommensurations occur below 100 K, perhaps as a result of the influence of the commensurate potentials of the undistorted alkaline sublattice. The disorder Tl-impurities may destroy the commensurate domains and lead to complete incommensuration in Tl-doped blue bronze below 100 K. The tremendous critical fluctuations and impurity-induced lack of long-range order of incommensurate CDW would lead to the spectral continuum or its disappearing. The weak softening of the amplitude mode is about 11%, which is similar to previous report.

• OSTI ID: 7201659
• Journal Information: International Journal of Modern Physics B; (United States), Vol. 6:13; ISSN 0217-9792
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DOPED MATERIALS
CRYSTAL-PHASE TRANSFORMATIONS
RAMAN SPECTRA
POTASSIUM COMPOUNDS
AMPLITUDES
CHARGE DENSITY
CRYSTAL DOPING
FLUCTUATIONS
IMPURITIES
INTERACTION RANGE
MOLYBDATES
OSCILLATION MODES
PHONONS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0065-0273 K
THALLIUM ADDITIONS
ALKALI METAL COMPOUNDS
ALLOYS
DISTANCE
MATERIALS
MOLYBDENUM COMPOUNDS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
QUASI PARTICLES
REFRACTORY METAL COMPOUNDS
SPECTRA
TEMPERATURE RANGE
THALLIUM ALLOYS
TRANSITION ELEMENT COMPOUNDS
VARIATIONS
360602* - Other Materials- Structure & Phase Studies
360606 - Other Materials- Physical Properties- (1992-)