Kinetically-Driven Frustration in Hybrid Spin Ladders |
| R.C.P. Carvalhoa, M.S.S. Pereira a, M.L. Lyraa, O. Rojas b, J Strecka c
aInstituto de Fisica, Universidade Federal de Alagoas, 57072-970 Maceio-AL, Brazil bDepartamento de Ciencias Exatas, Universidade Federal de Lavras, 37200-000, Lavras-MG, Brazil cDepartment of Theoretical Physics and Astrophysics, Faculty of Science, P.J. Šafárik University, Park Angelinum 9, 040 01 Košice, Slovakia |
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| We introduce a spin ladder model incorporating localized and delocalized spins, which is exactly solvable using the decoration-iteration and transfer-matrix techniques. Quantum correlations between delocalized spins induce an antiferromagnetic coupling between the spin chains that competes with a direct ferromagnetic exchange coupling. A resulting kinetically-driven frustration is predominant in the regime of low temperatures and large hopping amplitudes. We provide the full ground-state phase diagram, as well as the frustration diagram on distinct coupling regimes. |
DOI: 10.12693/APhysPolA.126.12 PACS numbers: 75.10.Jm, 75.10.Pq, 05.70.Ce |