University of Sheffield

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19922026

Showing 1995Show all

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cond-mat1995

The density matrix renormalisation group and critical phenomena

R. J. Bursill, F. Gode

We adapt White's density matrix renormalisation group (DMRG) to the direct study of critical phenomena. We use the DMRG to generate transformations in the space of coupling constan…

cond-mat1995★ 177 cited

Numerical and approximate analytical results for the frustrated spin-1/2 quantum spin chain

R. J. Bursill, G. A. Gehring, D. J. J. Farnell +3

We study the $T = 0$ frustrated phase of the $1 D$ quantum spin- $\frac{1}{2}$ system with nearest-neighbour and next-nearest-neighbour isotropic exchange known as the Majumdar-Ghosh Hami…

astro-ph1995★ 8 cited

Kinematics of ionized gas associated with the radio nucleus and lobes in the active galaxy IRAS 04210+0400

A. J. Holloway, W. Steffen, A. Pedlar +4

We have used high resolution longslit spectroscopy to investigate the ionized gas in the active galaxy IRAS 04210+0400 and its association with the radio structure. We suggest that…

cond-mat1995

Magnetism of Superconducting UPt3

G. Haran, G. A. Gehring

The phase diagram of superconducting $U P t_{3}$ in pressure-temperature plane, together with the neutron scattering data is studied within a two component superconducting order pa…

cond-mat1995★ 3 cited

Charge Transfer Excitons and Possible Exitonic Pairing in the Extended Three Band Hubbard Model

C. Vermeulen, W. Barford, E. R. Gagliano

Exact diagonalisations of the extended Hubbard model are performed. In the insulating regime it is shown that the nearest neighbour copper-oxygen repulsion, $V$ , leads to Frenkel e…

cond-mat1995★ 2 cited

Plastic energies in layered superconductors

N. K. Wilkin, M. A. Moore

We estimate the energy cost associated with two pancake vortices colliding in a layered superconductor. It is argued that this energy sets the plastics energy scale and is the anal…