The spin-1/2 square-lattice J1-J2 model: the spin-gap

Richter, Johannes, Zinke, Ronald and Farnell, Damian J. J. ORCID: https://orcid.org/0000-0003-0662-1927 2015. The spin-1/2 square-lattice J1-J2 model: the spin-gap. European Physical Journal B Condensed Matter Physics 88 (2) , pp. 1-6. 10.1140/epjb/e2014-50589-x

Full text not available from this repository.

Abstract

We use the coupled cluster method to high orders of approximation in order to calculate the ground-state energy, the ground-state magnetic order parameter, and the spin gap of the spin-1/2 J 1-J 2 model on the square lattice. We obtain values for the transition points to the magnetically disordered quantum paramagnetic phase of J 2 c1 = 0.454J 1 and J 2 c2 = 0.588J 1. The spin gap is zero in the entire parameter region accessible by our approach, i.e. for J 2 ≤ 0.49J 1 and J 2> 0.58J 1. This finding is in favor of a gapless spin-liquid ground-state in this parameter regime.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Dentistry
Subjects:	Q Science > QC Physics
Uncontrolled Keywords:	Solid State and Materials.
Publisher:	Springer Verlag
ISSN:	1434-6028
Last Modified:	04 Jan 2024 08:41
URI:	https://orca.cardiff.ac.uk/id/eprint/69112

Citation Data

Cited 42 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item