Competition between the Spin and Pseudospin Subsystems in a Model Cuprate
- Authors: Panov Y.D.1, Ulitko V.A.1, Budrin K.S.1, Yasinskaya D.N.1, Chikov A.A.1
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Affiliations:
- Ural Federal University Named after the First President of the Russian Federation B.N. Yeltsin
- Issue: Vol 61, No 5 (2019)
- Pages: 707-713
- Section: Magnetism
- URL: https://ogarev-online.ru/1063-7834/article/view/205310
- DOI: https://doi.org/10.1134/S106378341905024X
- ID: 205310
Cite item
Abstract
The competition between the magnetic and charge orderings in a model cuprate is considered in terms of a simplified static 2D spin–pseudospin model. This model is equivalent to the 2D dilute antiferromagnetic (AFM) Ising model with charged impurities. The mean-field approximation results are presented for the system under study and briefly compared to the classical Monte Carlo (MC) calculations. The numerical simulation shows that the cases of the strong exchange and the strong charge correlation differ qualitatively. In the case of a strong exchange, the AMF phase is instable with respect to the phase separation (PS) into the pseudospin (charge) and magnetic (spin) subsystems that behave as immiscible quantum liquids. The analytical expression has been obtained for the PS temperature.
About the authors
Yu. D. Panov
Ural Federal University Named after the First President of the Russian Federation B.N. Yeltsin
Author for correspondence.
Email: yuri.panov@urfu.ru
Russian Federation, Yekaterinburg, 620002
V. A. Ulitko
Ural Federal University Named after the First President of the Russian Federation B.N. Yeltsin
Email: yuri.panov@urfu.ru
Russian Federation, Yekaterinburg, 620002
K. S. Budrin
Ural Federal University Named after the First President of the Russian Federation B.N. Yeltsin
Email: yuri.panov@urfu.ru
Russian Federation, Yekaterinburg, 620002
D. N. Yasinskaya
Ural Federal University Named after the First President of the Russian Federation B.N. Yeltsin
Email: yuri.panov@urfu.ru
Russian Federation, Yekaterinburg, 620002
A. A. Chikov
Ural Federal University Named after the First President of the Russian Federation B.N. Yeltsin
Email: yuri.panov@urfu.ru
Russian Federation, Yekaterinburg, 620002
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