185 citations · 273 across the 4 of their papers we have counts for
4 papers
Ground-state phases of the spin-1/2 J_1-J_2 Heisenberg antiferromagnet on the square lattice: A high-order coupled cluster treatment
R. Darradi, O. Derzhko, R. Zinke +3
Using the coupled cluster method for high orders of approximation and complementary exact diagonalization studies we investigate the ground state properties of the spin-1/2 --…
Influence of Ising-anisotropy on the zero-temperature phase transition in the square lattice spin-1/2 J-J' model
R. Darradi, J. Richter, S. E. Krueger
We use a variational mean-field like approach, the coupled cluster method (CCM) and exact diagonalization to investigate the ground-state order-disorder transition for the square l…
High-Order Coupled Cluster Method Calculations for the Ground- and Excited-State Properties of the Spin-Half XXZ Model
R. F. Bishop, D. J. J. Farnell, S. E. Krueger +3
In this article, we present new results of high-order coupled cluster method (CCM) calculations, based on a Néel model state with spins aligned in the -direction, for both the g…
Diagonalization of a bosonic quadratic form using CCM: Application on a system with two interpenetrating square lattice antiferromagnets
Sven E. Krueger, Dirk Schmalfuss, Johannes Richter
While the diagonalization of a quadratic bosonic form can always be done using a Bogoliubov transformation, the practical implementation for systems with a large number of differen…