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Abstracts
A coupled spin-electron diamond chain with localized Ising spins placed on its nodal sites and mobile electrons delocalized over interstitial sites is explored in a magnetic field taking into account the difference between the Landé g-factors of the localized spins and mobile electrons. The ground-state phase diagram is constituted by two classical ferrimagnetic phases, the quantum unsaturated paramagnetic phase and the saturated paramagnetic phase. Both classical ferrimagnetic phases as well as the unsaturated paramagnetic phase are reflected in a low-temperature magnetization curve as intermediate magnetization plateaus. The unsaturated paramagnetic phase is quantum in its character as evidenced by the fermionic concurrence calculated for a pair of the mobile electrons hopping in between the interstitial sites. It is shown that the magnetic field can under certain conditions induce a quantum entanglement above the disentangled ground state.
Discipline
- 75.30.Kz: Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)(for ferroelectric phase transitions, see 77.80.B-; for superconductivity phase diagrams, see 74.25.Dw)
- 75.40.Cx: Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.)
- 05.50.+q: Lattice theory and statistics (Ising, Potts, etc.)(see also 64.60.Cn Order-disorder transformations, and 75.10.Hk Classical spin models)
- 75.10.Pq: Spin chain models
Journal
Year
Volume
Issue
Pages
140-142
Physical description
Dates
published
2017-07
Contributors
author
- Instituto de Física, Universidade Federal de Alagoas, 57072-970 Maceió, Alagoas, Brazil
author
- Instituto de Física, Universidade Federal de Alagoas, 57072-970 Maceió, Alagoas, Brazil
author
- Department of Theoretical Physics and Astrophysics, Faculty of Science, P.J. Šafárik University, Park Angelinum 9, 040 01 Košice, Slovakia
author
- Instituto de Física, Universidade Federal de Alagoas, 57072-970 Maceió, Alagoas, Brazil
References
- [1] M.A. Nielsen, I.L. Chuang, Quantum Computation and Quantum Information, Springer, Cambridge 2000, doi: 10.1080/00107514.2011.587535
- [2] M.S.S. Pereira, F.A.B.F. de Moura, M.L. Lyra, Phys. Rev. B 77, 024402 (2008), doi: 10.1103/PhysRevB.77.024402
- [3] M.S.S. Pereira, F.A.B.F. de Moura, M.L. Lyra, Phys. Rev. B 79, 054427 (2009), doi: 10.1103/PhysRevB.79.054427
- [4] B.M. Lisnii, Low Temp. Phys. 37, 296 (2011), doi: 10.1063/1.3592221
- [5] J. Torrico, M. Rojas, M.S.S. Pereira, J. Strečka, M.L. Lyra, Phys. Rev. B 93, 014428 (2016), doi: 10.1103/PhysRevB.93.014428
- [6] W.-G. Yin, Ch.R. Roth, A.M. Tsvelik, arXiv: 1510.00030 http://arXiv.org/abs/1510.00030
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv132n1p36kz