Published December 1996
| Version v1
Journal article
Large copper isotope effect in oxygen depleted YBa2Cu3Oy: Importance of Cu-dominated phonon modes in the pairing mechanism
- 1. Morris Research, Inc., 44 Marguerita Road, Kensington, California 94707 (United States)
- 2. Institute of Molecular Physics, Russian Research Center ''Kurchatov Institute'', Moscow (Russia)
Description
We have measured the copper isotope effect in YBa2Cu3Oy. We find a large positive copper-isotope exponent (αCu≅0.37) in the underdoped plateau region (y∼6.6). The exponent decreases to zero (or slightly negative) in the optimally doped region (y∼6.94). The αCu in YBa2Cu3O6.6 is similar to the αO (oxygen-isotope exponent) in YBa2-xLaxCu3Oy with the same Tc. These comparable values of αCu and αO show that phonons which involve Cu motion as well as the (high-frequency) modes of the oxygen in the CuO2 planes are important in the pairing mechanism. copyright 1996 The American Physical Society
Additional details
Publishing Information
- Journal Title
- Physical Review. B, Condensed Matter
- Journal Volume
- 54
- Journal Issue
- 21
- Journal Page Range
- p. 14956-14959.
- ISSN
- 0163-1829
- CODEN
- PRBMDO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 28016913
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- BARIUM OXIDES; COPPER OXIDES; HIGH-TC SUPERCONDUCTORS; ISOTOPE EFFECTS; PAIRING INTERACTIONS; PHONONS; TRANSITION TEMPERATURE; YTTRIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; INTERACTIONS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; QUASI PARTICLES; SUPERCONDUCTORS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS