Neutron-scattering investigation of the charge-density wave in Tl sub 0. 3 MoO sub 3

Journal Article · Thu Aug 15 04:00:00 EDT 1991 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.44.3324· OSTI ID:5341691

Moudden, A H ^[1]; Elmiger, M; Shapiro, S M ^[2]; Collins, B T; Greenblatt, M ^[3]

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1. Laboratoire Leon Brillouin, Centre d'Etudes Nucleaires de Saclay, F-91191 Gif-sur-Yvette CEDEX (France) Physics Department, Brookhaven National Laboratory, Upton, New York (USA)
2. Physics Department, Brookhaven National Laboratory, Upton, New York (USA)
3. Department of Chemistry, Rutgers, The State University of New Jersey, New Brunswick, New Jersey (USA)

Elastic-neutron-scattering experiments, performed on a single crystal of Tl{sub 0.3}MoO{sub 3}, show the formation of a periodic distortion below the metal-semiconductor transition at about 170 K. Similar to the isostructural blue bronzes K{sub 0.3}MoO{sub 3} and Rb{sub 0.3}MoO{sub 3}, this periodic distortion is characterized by a temperature-dependent wave vector {bold q}=(0,{ital q}{sub {ital b}}({ital T}),0.5) referring to the high-temperature space group {ital C}2/{ital m}. The incommensurate component {ital q}{sub {ital b}}({ital T}) decreases continuously from 0.267 at the transition temperature to 0.253 at about 100 K, below which it remains constant down to 10 K. Unlike the K and Rb analogs for which there is still some debate on whether there is a commensurate-incommensurate transition at 100 K, the Tl blue bronze is clearly incommensurate down to low temperatures. While the magnetic susceptibility shows a substantial anomaly around 50 K, detailed neutron-scattering studies in this temperature region reveal no significant effect on the charge-density wave.

• OSTI ID: 5341691
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 44:7; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALLOYS
BRONZE
CHALCOGENIDES
COHERENT SCATTERING
COPPER ALLOYS
COPPER BASE ALLOYS
CRYSTALS
DIFFRACTION
ELASTIC SCATTERING
LOW TEMPERATURE
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
MONOCRYSTALS
NEUTRON DIFFRACTION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
REFRACTORY METAL COMPOUNDS
SCATTERING
SPACE GROUPS
THALLIUM COMPOUNDS
THALLIUM OXIDES
TIN ALLOYS
TRANSITION ELEMENT COMPOUNDS
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE