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Document type:
Zeitschriftenaufsatz
Author(s):
Verresen, Ruben; Pollmann, Frank; Moessner, Roderich
Title:
Quantum dynamics of the square-lattice Heisenberg model
Abstract:
Despite nearly a century of study of the S=1/2 Heisenberg model on the square lattice, there is still disagreement on the nature of its high-energy excitations. By tuning toward the Heisenberg model from the exactly soluble Ising limit, we find that the strongly attractive magnon interactions of the latter naturally account for a number of spectral features of the Heisenberg model. This claim is backed up both numerically and analytically. Using the density matrix renormalization group method, w...     »
Journal title:
Physical Review B 2018-10
Year:
2018
Journal volume:
98
Journal issue:
15
Fulltext / DOI:
doi:10.1103/physrevb.98.155102
Publisher:
American Physical Society (APS)
E-ISSN:
2469-99502469-9969
Date of publication:
01.10.2018
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