The influence of anharmonic phonons on the isotope effect in high-{Tc} oxides
Conference
·
OSTI ID:10160365
Anharmonic phonons are examined to study the unusual isotope effect exponents for the high-{Tc} oxides. Within a simple model of anharmonicity, the mass dependences of the electron-phonon coupling constant {lambda} and the phonon frequency determine the isotope effect exponent {alpha} as a function of coupling strength. A model in which the outer wells of a multiple-well potential deepen as the orthorhombic/low temperature tetragonal phase transition in La{sub 2-x}M{sub x}CuO{sub 4} is approached is consistent with some experimentally observed variations in {Tc} and {alpha}. 10 refs.
- Research Organization:
- Lawrence Berkeley Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 10160365
- Report Number(s):
- LBL-31865; CONF-920141-8; ON: DE92017083; CNN: Grant DMR88-18404
- Resource Relation:
- Conference: Lattice effects in high {Tc} superconductors,Santa Fe, NM (United States),13-15 Jan 1992; Other Information: PBD: Jan 1992
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HIGH-TC SUPERCONDUCTORS
ISOTOPE EFFECTS
ELECTRON-PHONON COUPLING
PHONONS
LANTHANUM OXIDES
COPPER OXIDES
CRYSTAL STRUCTURE
STRONTIUM OXIDES
YTTRIUM OXIDES
BARIUM OXIDES
ANHARMONIC CRYSTALS
ANHARMONIC OSCILLATORS
665411
BASIC SUPERCONDUCTIVITY STUDIES
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HIGH-TC SUPERCONDUCTORS
ISOTOPE EFFECTS
ELECTRON-PHONON COUPLING
PHONONS
LANTHANUM OXIDES
COPPER OXIDES
CRYSTAL STRUCTURE
STRONTIUM OXIDES
YTTRIUM OXIDES
BARIUM OXIDES
ANHARMONIC CRYSTALS
ANHARMONIC OSCILLATORS
665411
BASIC SUPERCONDUCTIVITY STUDIES