Where is the pi particle?
| dc.creator | Tchernyshyov, O. | |
| dc.creator | Norman, M. R. | |
| dc.creator | Chubukov, A. V. | |
| dc.date | 2000-09-05 | |
| dc.date.accessioned | 2026-07-07T02:38:39Z | |
| dc.date.available | 2026-07-07T02:38:39Z | |
| dc.description | We discuss the interplay of particle-particle and particle-hole spin-triplet channels in high-T_c superconductors using a quasiparticle dispersion motivated by angle-resolved photoemission. Within a generalized RPA, we find a well defined antibound state of two holes, the pi resonance of Demler and Zhang, as well as a bound state of a particle and a hole, the spin exciton. We show that the energy of the pi resonance always exceeds 2 Delta, twice the maximum d-wave gap, therefore the neutron resonance observed in the cuprates around energy Delta is most likely a spin exciton. At the same time, we speculate that the pi particle can exist at higher energies and might be observed in neutron scattering around 100 meV. | |
| dc.description | RevTeX, 5 pages, 4 eps figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0009072 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0009072 | |
| dc.identifier | Phys. Rev. B 63, 144507 (2001) | |
| dc.identifier | doi:10.1103/PhysRevB.63.144507 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/16746 | |
| dc.subject | Superconductivity | |
| dc.title | Where is the pi particle? | |
| dc.type | text |