Peculiarities in electronic properties of molybdenum ternary sulfides PbMo/sub 6/S/sub 8/

Journal Article · Thu Jul 01 04:00:00 EDT 1982 · Sov. J. Low Temp. Phys. (Engl. Transl.); (United States)

OSTI ID:6385776

Shevchenko, A D; Aleksandrov, O V; Drozdova, S V; Kalyuzhnaya, G A; Kiseleva, K V; Primachenko, V F; Shevchuk, N V; Yachmenev, V E

The influence of the technological parameters of its synthesis on the superconducting and structural properties of PbMo/sub 6/S/sub 8/ has been investigated. For the first time lattice instability near 80 /sup 0/K has been detected from x-ray structural studies carried out on PbMo/sub 6/S/sub 8/ in the temperature range 4.2--300 /sup 0/K. The resistivity rho(T/sub c/-300 /sup 0/K), magnetic susceptibility chi(T/sub c/-300 /sup 0/K), and specific heat C/sub p/ (2--300 /sup 0/K) of the PbMo/sub 6/S/sub 8/ system were measured as a function of the temperature. Joint analysis of the experimental results and the data in the literature on inelastic neutron scattering at 4.2 and 300 /sup 0/K enabled us to make the first quantitative calculations of the phonon specific heat and its anharmonic component, the temperature dependence of the electronic specific heat coefficient ..gamma../sub H/(T), the band density of electronic states at the Fermi level N/sub B/S(E/sub F/), and the electron-phonon interaction constant lambda(T). It has been found that the rho(T), ..gamma../sub H/(T), and lambda(T) curves display anomalies near temperatures roughly-equal80 /sup 0/K, at which lattice instability occurs, and the high-field superconductivity in PbMo/sub 6/S/sub 8/ is a consequence of the large value of N/sub B/S(E/sub F/).

• Research Organization: Institute of Metal Physics, Academy of Sciences of the Ukrainian SSR, Kiev
• OSTI ID: 6385776
• Journal Information: Sov. J. Low Temp. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Low Temp. Phys. (Engl. Transl.); (United States) Vol. 8:7; ISSN SJLPD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHALCOGENIDES
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON-PHONON COUPLING
ELECTRONIC STRUCTURE
ENERGY-LEVEL DENSITY
LEAD COMPOUNDS
LEAD SULFIDES
LOW TEMPERATURE
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MEDIUM TEMPERATURE
MOLYBDENUM COMPOUNDS
MOLYBDENUM SULFIDES
NEUTRON DIFFRACTION
PHYSICAL PROPERTIES
SCATTERING
SPECIFIC HEAT
SULFIDES
SULFUR COMPOUNDS
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE