Oxygen isotope effect on the effective mass of carriers from magnetic measurements on La2-xSrxCuO4
Creators
- 1. Morris Research, Inc., 1918 University Avenue, Berkeley, California 94704 (United States)
Description
Oxygen isotope effects on Tc and the Meissner fraction f have been investigated in fine-grained, decoupled La2-xSrxCuO4 with x=0.105, 0.110, and 0.115. We find that these oxygen isotope effects are related to each other: d lnTc/d lnM∼d lnf/d lnM (where M is the mass of oxygen). We also show that the trapped flux due to intergrain weak-link and intragrain flux pinning is negligible in our samples, and that the Meissner fractions for the samples with the same 16O isotope are nearly equal The observed large oxygen isotope effects on Tc and the Meissner fraction can be explained as due to the oxygen-mass dependence of m* (effective mass of carriers). The results may suggest that the conducting carriers in the cuprate superconductors are of polaronic type
Additional details
Publishing Information
- Journal Title
- Physical Review. B, Condensed Matter
- Journal Volume
- 52
- Journal Issue
- 9
- Journal Page Range
- p. 6840-6844.
- ISSN
- 0163-1829
- CODEN
- PRBMDO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 27021245
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- COPPER OXIDES; EFFECTIVE MASS; HIGH-TC SUPERCONDUCTORS; ISOTOPE EFFECTS; LANTHANUM OXIDES; MAGNETIC FLUX; OXYGEN; POLARONS; STRONTIUM OXIDES; TRANSITION TEMPERATURE
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; ELEMENTS; LANTHANUM COMPOUNDS; MASS; NONMETALS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; QUASI PARTICLES; RARE EARTH COMPOUNDS; STRONTIUM COMPOUNDS; SUPERCONDUCTORS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS