| dc.creator | Heidrich Meisner, Fabián | |
| dc.creator | Honecker, Andreas | |
| dc.creator | Cabra, Daniel Carlos | |
| dc.creator | Brenig, Wolfram | |
| dc.date | 2002-10-29 | |
| dc.date | 2021-10-04T19:33:01Z | |
| dc.date.accessioned | 2023-07-15T03:32:40Z | |
| dc.date.available | 2023-07-15T03:32:40Z | |
| dc.identifier | http://sedici.unlp.edu.ar/handle/10915/126203 | |
| dc.identifier | https://journals.aps.org/prb/abstract/10.1103/PhysRevB.66.140406 | |
| dc.identifier | issn:0163-1829 | |
| dc.identifier | issn:1095-3795 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7466117 | |
| dc.description | We analyze the thermal conductivity of anisotropic and frustrated spin-1/2 chains using analytical and numerical techniques. This includes mean-field theory based on the Jordan-Wigner transformation, bosonization, and exact diagonalization of systems with N ≲ 18 sites. We present results for the temperature dependence of the zero-frequency weight of the conductivity for several values of the anisotropy Δ. In the gapless regime, we show that the mean-field theory compares well to known results and that the low-temperature limit is correctly described by bosonization. In the antiferromagnetic and ferromagnetic gapped regime, we analyze the temperature dependence of the thermal conductivity numerically. The convergence of the finite-size data is remarkably good in the ferromagnetic case. Finally, we apply our numerical method and mean-field theory to the frustrated chain where we find a good agreement of these two approaches on finite systems. Our numerical data do not yield evidence for a diverging thermal conductivity in the thermodynamic limit in case of the antiferromagnetic gapped regime of the frustrated chain. | |
| dc.description | Departamento de Física | |
| dc.format | application/pdf | |
| dc.language | en | |
| dc.rights | http://creativecommons.org/licenses/by/4.0/ | |
| dc.rights | Creative Commons Attribution 4.0 International (CC BY 4.0) | |
| dc.subject | Física | |
| dc.subject | Ciencias Exactas | |
| dc.subject | thermal conductivity | |
| dc.subject | Jordan-Wigner transformation | |
| dc.subject | Anisotropy | |
| dc.title | Thermal conductivity of anisotropic and frustrated spin-½ chains | |
| dc.type | Articulo | |
| dc.type | Articulo | |
