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Dual character of the electronic structure of YBa2Cu4O8: the conduction bands of CuO2 planes and CuO chains.
- Source :
-
Physical review letters [Phys Rev Lett] 2007 Apr 13; Vol. 98 (15), pp. 157002. Date of Electronic Publication: 2007 Apr 11. - Publication Year :
- 2007
-
Abstract
- We use microprobe angle-resolved photoemission spectroscopy (microARPES) to separately investigate the electronic properties of CuO2 planes and CuO chains in the high temperature superconductor, YBa2Cu4O8. For the CuO2 planes, a two-dimensional (2D) electronic structure is observed and, in contrast to Bi2Sr2CaCu2O8+delta, the bilayer splitting is almost isotropic and 50% larger, which strongly suggests that bilayer splitting has no direct effect on the superconducting properties. In addition, the scattering rate for the bonding band is about 1.5 times stronger than the antibonding band and is independent of momentum. For the CuO chains, the electronic structure is quasi-one-dimensional and consists of a conduction and insulating band. Finally, we find that the conduction electrons are well confined within the planes and chains with a nontrivial hybridization.
Details
- Language :
- English
- ISSN :
- 0031-9007
- Volume :
- 98
- Issue :
- 15
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 17501373
- Full Text :
- https://doi.org/10.1103/PhysRevLett.98.157002