dc.contributor.author | Misquitta, AJ | |
dc.contributor.author | Maezono, R | |
dc.contributor.author | Drummond, ND | |
dc.contributor.author | Stone, AJ | |
dc.contributor.author | Needs, RJ | |
dc.date.accessioned | 2014-03-10T08:59:03Z | |
dc.date.available | 2014-03-10T08:59:03Z | |
dc.date.issued | 2014 | |
dc.identifier.citation | Phys. Rev. B 89, 045140 | |
dc.identifier.uri | http://qmro.qmul.ac.uk/xmlui/handle/123456789/5599 | |
dc.description | 10 pages, 8 figures, 1 table | |
dc.description.abstract | The non-additive dispersion contribution to the binding energy of three one-dimensional (1D) wires is investigated using wires modelled by (i) chains of hydrogen atoms and (ii) homogeneous electron gases. We demonstrate that the non-additive dispersion contribution to the binding energy is significantly enhanced compared with that expected from Axilrod-Teller-Muto-type triple-dipole summations and follows a different power-law decay with separation. The triwire non-additive dispersion for 1D electron gases scales according to the power law $d^{-\beta}$, where $d$ is the wire separation, with exponents $\beta(r_s)$ smaller than 3 and slightly increasing with $r_s$ from 2.4 at $r_s = 1$ to 2.9 at $r_s=10$, where $r_s$ is the density parameter of the 1D electron gas. This is in good agreement with the exponent $\beta=3$ suggested by the leading-order charge-flow contribution to the triwire non-additivity, and is a significantly slower decay than the $\sim d^{-7}$ behaviour that would be expected from triple-dipole summations. | |
dc.publisher | American Physical Society | |
dc.relation.isreplacedby | 123456789/5799 | |
dc.relation.isreplacedby | http://qmro.qmul.ac.uk/jspui/handle/123456789/5799 | |
dc.title | Anomalous non-additive dispersion interactions in systems of three one-dimensional wires | |
dc.type | Journal Article | |
dc.identifier.doi | 10.1103/PhysRevB.89.045140 | |
dc.relation.isPartOf | Physical Review B | |
pubs.author-url | http://arxiv.org/abs/1308.1557v2 | |
pubs.publisher-url | http://dx.doi.org/10.1103/PhysRevB.89.045140 | |