Electronic crossover in the normal state of YBa2Cu4O8
- 1. Physik-Institut, Universitaet Zuerich, CH-8057 Zuerich (Switzerland)
- 2. Laboratorium fuer Festkoerperphysik, Eidgenoessische Technische Hochschule Zuerich, CH-8093 Zuerich (Switzerland)
Description
By performing nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR), respectively, with Cu, O, and Y isotopes in the normal state of the high-temperature superconductor YBa2Cu4O8, we have found the following major results: (i) The Y, Cu, and O shift data support, for planes and chains, the validity of the single-spin fluid model.(ii) Around T†=180 K, open-quotes anomaliesclose quotes in the temperature behavior of several NMR/NQR quantities have been detected. (iii) The anomalies do not arise from a structural phase transition; instead they reflect an electronic crossover which involves enhanced charge fluctuations in planes and chains accompanied by a charge (hole) transfer from chain to plane. (iv) As a possible mechanism of the crossover, a charge-density-wave instability is proposed. copyright 1997 The American Physical Society
Additional details
Publishing Information
- Journal Title
- Physical Review. B, Condensed Matter
- Journal Volume
- 56
- Journal Issue
- 9
- Journal Page Range
- p. 5542-5551.
- ISSN
- 0163-1829
- CODEN
- PRBMDO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 29008148
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- BARIUM OXIDES; COPPER OXIDES; ELECTRICAL PROPERTIES; HIGH-TC SUPERCONDUCTORS; NUCLEAR MAGNETIC RESONANCE; NUCLEAR QUADRUPOLE RESONANCE; YTTRIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; MAGNETIC RESONANCE; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RESONANCE; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS