Magnetic collective mode dispersion in high-temperature superconductors
Abstract
Recent neutron-scattering experiments in the superconducting state of YBa2Cu3O6+x have been interpreted in terms of a magnetic collective mode whose dispersion relative to the commensurate wave vector has a curvature opposite in sign to a conventional magnon dispersion. The purpose of this article is to demonstrate that simple linear-response calculations are in support of a collective-mode interpretation, and to explain why the dispersion has the curvature it does.
- Publication:
-
Physical Review B
- Pub Date:
- March 2001
- DOI:
- 10.1103/PhysRevB.63.092509
- arXiv:
- arXiv:cond-mat/0010298
- Bibcode:
- 2001PhRvB..63i2509N
- Keywords:
-
- 74.72.-h;
- 25.40.Fq;
- 71.18.+y;
- 74.25.Jb;
- Cuprate superconductors;
- Inelastic neutron scattering;
- Fermi surface: calculations and measurements;
- effective mass g factor;
- Electronic structure;
- Condensed Matter - Superconductivity
- E-Print:
- 3 pages, revtex, 4 encapsulated postscript figures