Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

Coupled cluster treatment of the Shastry-Sutherland antiferromagnet

Darradi, R., Richter, J. and Farnell, Damian J. J. 2005. Coupled cluster treatment of the Shastry-Sutherland antiferromagnet. Physical Review -Series B- 72 (10) , 104425.

Full text not available from this repository.

Abstract

We consider the zero-temperature properties of the spin-half two-dimensional Shastry-Sutherland antiferromagnet by using a high-order coupled cluster method treatment. We find that this model demonstrates various ground-state phases (Néel, magnetically disordered, orthogonal dimer), and we make predictions for the positions of the phase transition points. In particular, we find that the orthogonal-dimer state becomes the ground state at J2d∕J1∼1.477. For the critical point J2c∕J1 where the semiclassical Néel order disappears we obtain a significantly lower value than J2d∕J1, namely, J2c∕J1 in the range 1.14–1.39. We therefore conclude that an intermediate phase exists between the Néel and the dimer phases. An analysis of the energy of a competing spiral phase yields clear evidence that the spiral phase does not become the ground state for any value of J2. The intermediate phase is therefore magnetically disordered but may exhibit plaquette or columnar dimer ordering.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Dentistry
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Publisher: American Physical Society
ISSN: 1098-0121
Last Modified: 04 Jun 2017 06:44
URI: http://orca.cf.ac.uk/id/eprint/64272

Citation Data

Cited 80 times in Google Scholar. View in Google Scholar

Cited 72 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item Edit Item