Strongly Anisotropic S=1 (Pseudo) Spin Systems: from Mean Field to Quantum Monte-Carlo

• Authors: Yu. Panov , A. Moskvin , V. Konev , E. Vasinovich , V. Ulitko
• Languages of publication: EN

Abstracts

EN

The S=1 pseudospin formalism was recently proposed to describe the charge degree of freedom in a model high-T_{c} cuprate with the on-site Hilbert space reduced to the three effective valence centers, nominally Cu^{1+;2+;3+}. With small corrections the model becomes equivalent to a strongly anisotropic S=1 quantum magnet in an external magnetic field. We have applied a generalized mean-field approach and quantum Monte-Carlo technique for the model 2D S=1 system to find the ground state phase with its evolution under deviation from half-filling and different correlation functions. Special attention is given to the role played by the on-site correlation ("single-ion anisotropy").

Keywords

EN

75.10.Hk; 75.10.Jm; 74.25.Dw

Discipline

• 74.25.Dw: Superconductivity phase diagrams
• 75.10.Hk: Classical spin models
• 75.10.Jm: Quantized spin models, including quantum spin frustration

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2018
• Volume: 133
• Issue: 3
• Pages: 426-428

Dates

published

2018-03

Contributors

author

Yu. Panov

• Ural Federal University, Ekaterinburg 620083, Russia

author

A. Moskvin

• Ural Federal University, Ekaterinburg 620083, Russia

author

V. Konev

• Ural Federal University, Ekaterinburg 620083, Russia

author

E. Vasinovich

• Ural Federal University, Ekaterinburg 620083, Russia

author

V. Ulitko

• Ural Federal University, Ekaterinburg 620083, Russia

References

• [1] A.S. Moskvin, JETP 121, 477 (2015), doi: 10.1134/S1063776115090095
• [2] A.S. Moskvin, Phys. Rev. B 84, 075116 (2011), doi: 10.1103/PhysRevB.84.075116
• [3] A.S. Moskvin, J. Phys.:Condens. Matter 25, 085601 (2013), doi: 10.1088/0953-8984/25/8/085601
• [4] A.S. Moskvin, J. Phys.: Conf. Ser. 592, 012076 (2015), doi: 10.1088/1742-6596/592/1/012076
• [5] A.S. Moskvin, Yu.D. Panov, F.N. Rybakov, A.B. Borisov, J. Supercond. Nov. Magn. 30, 43 (2017), doi: 10.1007/s10948-016-3748-z
• [6] R. Micnas, J. Ranninger, S. Robaszkiewicz, Rev. Mod. Phys. 62, 113 (1990), doi: 10.1103/RevModPhys.62.113
• [7] N.A. Mikushina, A.S. Moskvin, Phys. Lett. A 302, 8 (2002), doi: 10.1016/S0375-9601(02)01084-8
• [8] G. Schmid, S. Todo, M. Troyer, A. Dorneich, Phys. Rev. Lett. 88, 167208 (2002), doi: 10.1103/PhysRevLett.88.167208
• [9] V.G. Rousseau, Phys. Rev. E 78, 056707 (2008), doi: 10.1103/PhysRevE.78.056707

Identifiers

DOI

10.12693/APhysPolA.133.426