dc.contributor.author | SANVITO, STEFANO | en |
dc.contributor.author | AKANDE, AKINLOLU | en |
dc.date.accessioned | 2012-03-07T16:56:28Z | |
dc.date.available | 2012-03-07T16:56:28Z | |
dc.date.issued | 2012 | en |
dc.date.submitted | 2012 | en |
dc.identifier.citation | A. Akande and S. Sanvito, Persistent current and Drude weight for the one-dimensional Hubbard model from current lattice density functional theory, Journal of Physics: Condensed Matter, 24, 5, 055602, 2012 | en |
dc.identifier.other | Y | en |
dc.identifier.uri | http://hdl.handle.net/2262/62563 | |
dc.description | PUBLISHED | en |
dc.description.abstract | The Bethe ansatz local density approximation (LDA) to lattice density functional theory (LDFT) for the one-dimensional repulsive Hubbard model is extended to current-LDFT (CLDFT). The transport properties of mesoscopic Hubbard rings threaded by a magnetic flux are then systematically investigated by this scheme. In particular we present calculations of ground state energies, persistent currents and Drude weights for both a repulsive homogeneous and a single impurity Hubbard model. Our results for the ground state energies in the metallic phase compare favorably well with those obtained with numerically accurate many-body techniques. Also the dependence of the persistent currents on the Coulomb and the impurity interaction strength, and on the ring size are all well captured by LDA-CLDFT. Our study demonstrates the value of CLDFT in describing the transport properties of one-dimensional correlated electron systems. As its computational overheads are rather modest, we propose this method as a tool for studying problems where both disorder and interaction are present. | en |
dc.description.sponsorship | We thank N Baadji, I Rungger and V L Campo for useful discussions. This work is supported by the Science Foundation of Ireland under the grants SFI05/RFP/PHY0062 and 07/IN.1/I945. Computational resources have been provided by the HEA IITAC project managed by the Trinity Center for High Performance Computing and by ICHEC. | en |
dc.language.iso | en | en |
dc.relation.ispartofseries | Journal of Physics: Condensed Matter | en |
dc.relation.ispartofseries | 24 | en |
dc.relation.ispartofseries | 5, 055602 | en |
dc.rights | Y | en |
dc.subject | Condensed matter physics | en |
dc.subject | Thin films | en |
dc.title | Persistent current and Drude weight for the one-dimensional Hubbard model from current lattice density functional theory | en |
dc.type | Journal Article | en |
dc.contributor.sponsor | Science Foundation Ireland (SFI) | en |
dc.contributor.sponsor | Science Foundation Ireland (SFI) | en |
dc.type.supercollection | scholarly_publications | en |
dc.type.supercollection | refereed_publications | en |
dc.identifier.peoplefinderurl | http://people.tcd.ie/sanvitos | en |
dc.identifier.peoplefinderurl | http://people.tcd.ie/aakande | en |
dc.identifier.rssinternalid | 78582 | en |
dc.contributor.sponsorGrantNumber | SFI05/RFP/PHY0062 | en |
dc.contributor.sponsorGrantNumber | 07/IN.1/I945 | en |
dc.subject.TCDTheme | Nanoscience & Materials | en |
dc.identifier.rssuri | http://dx.doi.org/10.1088/0953-8984/24/5/055602 | en |