Nernst coefficient and Magnetoresistance in High-Tc Superconductors
| dc.creator | Kontani, Hiroshi | |
| dc.date | 2002-04-09 | |
| dc.date | 2002-10-03 | |
| dc.date.accessioned | 2026-07-07T02:44:59Z | |
| dc.date.available | 2026-07-07T02:44:59Z | |
| dc.description | In hole-doped high-Tc cuprates, the Nernst coefficient (ν) as well as the magnetoresistance (Δρ/ρ) increase drastically below the pseudo-gap temperature, T^*. This unexpected result attracts much attention in that it reflects the fundamental feature of the electronic state in the pseudo-gap region, which has been a central issue on high-Tc cuprates. In this letter, we study these transport phenomena in terms of the fluctuation-exchange (FLEX)+T-matrix approximation. In this present theory, the d-wave superconducting (SC) fluctuations, which are mediated by antiferromagnetic (AF) correlations, become dominant below T^*. We focus on the role of the vertex corrections both for the charge current and the heat one, which are indispensable to keep the conservation laws. As a result, the mysterious behaviors of νand Δρ/ρ, which are the key phenomena in the pseudo-gap region, are naturally explained as the reflection of the enhancement of the SC fluctuation, without assuming thermally excited vortices. The present result suggests that the pseudo-gap region in high-Tc cuprates is well described in terms of the Fermi liquid with AF and SC fluctuations. | |
| dc.description | 5 pages, 8 figures, accepted for publication in PRL | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0204193 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0204193 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/19151 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Superconductivity | |
| dc.title | Nernst coefficient and Magnetoresistance in High-Tc Superconductors | |
| dc.type | text |