A Coupled Spin-Electron Diamond Chain with Different Landé g-Factors of Localized Ising Spins and Mobile Electrons

• Authors: J. Torrico , M. Pereira , J. Strečka , M. Lyra
• Languages of publication: EN

Abstracts

EN

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.

Keywords

EN

05.50.+q; 75.10.Pq; 75.30.Kz; 75.40.Cx

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

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 132
• Issue: 1
• Pages: 140-142

Dates

published

2017-07

Contributors

author

J. Torrico

• Instituto de Física, Universidade Federal de Alagoas, 57072-970 Maceió, Alagoas, Brazil

author

M. Pereira

• Instituto de Física, Universidade Federal de Alagoas, 57072-970 Maceió, Alagoas, Brazil

author

J. Strečka

• Department of Theoretical Physics and Astrophysics, Faculty of Science, P.J. Šafárik University, Park Angelinum 9, 040 01 Košice, Slovakia

author

M. Lyra

• 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

Identifiers

DOI

10.12693/APhysPolA.132.140