ID 6501
File
pp45_13.pdf 355 KB
Authors
Sakakibara, H. Department of Engineering Science, The University of Electro-Communications Researchers DB KAKEN
Suzuki, K. Department of Applied Physics, The University of Tokyo
Usui, H. Department of Engineering Science, The University of Electro-Communications
Kuroki, K. Department of Engineering Science, The University of Electro-Communications
Arita, R. Department of Applied Physics, The University of Tokyo / JST, PRESTO
Scalapino, D.J. Physics Department, University of California
Aoki, H. Department of Physics, The University of Tokyo
Keywords
cuprates
superconductivity
two-orbital model
band calculation
flucutuation exchange approximation(FLEX)
spin fluctuation
Abstract
Our recent study has revealed that the mixture of the dz2 orbital component into the Fermi surface suppresses Tc in the cuprates such as La2CuO4. We have also shown that applying hydrostatic pressure enhances Tc due to smaller mixing of the Cu4s component. We call these the “orbital distillation” effect. In our previous study, the 4s orbital was taken into account through the hoppings in the dx2-y2 sector, but here we consider a model in which of the dx2-y2, dz2 and 4s orbitals are all considered explicitly. The present study reinforces our conclusion that smaller 4s hybridization further enhances Tc.
Publisher
Elsevier B.V.
Content Type
Conference Paper
Link
ISSN
18753892
Journal Title
Physics Procedia
Volume
45
Start Page
13
End Page
16
Published Date
2013
Publisher-DOI
Text Version
Publisher
Rights
© 2013 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/)
Citation
H. Sakakibara, K. Suzuki, H. Usui, K. Kuroki, R. Arita, D.J. Scalapino and H. Aoki. Three-orbital study on the orbital distillation effect in the high Tc cuprates. Physics Procedia. 2013, 45, 13-16. 25th International Symposium on Superconductivity(ISS 2012)
Department
Faculty of Engineering/Graduate School of Engineering
Language
English