https://doi.org/10.1140/epjb/s10051-022-00359-0
Regular Article - Solid State and Materials
Quantum Heisenberg model on a sawtooth-chain lattice: rotation-invariant Green’s function method
1
Institute for Condensed Matter Physics, National Academy of Sciences of Ukraine, Svientsitskii Street 1, 79011, L’viv, Ukraine
2
Institut für Physik, Otto-von-Guericke-Universität Magdeburg, P.O. Box 4120, 39016, Magdeburg, Germany
Received:
3
May
2022
Accepted:
24
May
2022
Published online:
10
June
2022
We apply the rotation-invariant Green’s function method (RGM) to study the spin 
Heisenberg model on a one-dimensional sawtooth lattice, which has two nonequivalent sites in the unit cell. We check the RGM predictions for observable quantities by comparison with the exact-diagonalization and finite-temperature-Lanczos calculations. We discuss the thermodynamic and dynamic properties of this model in relation to the mineral atacamite Cu
Cl(OH)
complementing the RGM outcomes by results of other approaches.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2022
