- Tytuł:
- Frustration and Entanglement in Compass and Spin-Orbital Models
- Autorzy:
- Oleś, Andrzej
- Powiązania:
- https://bibliotekanauki.pl/articles/1384027.pdf
- Data publikacji:
- 2015-02
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
75.10.Jm
64.70.Tg
75.25.Dk
79.60.-i - Opis:
- We review the consequences of intrinsic frustration of the orbital superexchange and of spin-orbital entanglement. While the Heisenberg perturbing interactions remove frustration in the compass model, the lowest columnar excitations are robust in the nanoscopic compass clusters and might be used for quantum computations. Entangled spin-orbital states determine the ground states in some cases, while in others concern excited states and lead to measurable consequences, as in the RVO₃ perovskites. On-site entanglement for strong spin-orbit coupling generates the frustrated Kitaev-Heisenberg model with a rich magnetic phase diagram on the honeycomb lattice. Frustration is here reflected in hole propagation which changes from coherent in an antiferromagnet via hidden quasiparticles in zigzag and stripe phases to entirely incoherent one in the Kitaev spin liquid.
- Źródło:
-
Acta Physica Polonica A; 2015, 127, 2; 163-169
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki