Phenomenological XXZ model for the competition between superconductivity and charge order in cuprates
Giulia Venditti, Ilaria Maccari, Jose Lorenzana, Sergio Caprara
SciPost Phys. 15, 230 (2023) · published 7 December 2023
- doi: 10.21468/SciPostPhys.15.6.230
- Submissions/Reports
Abstract
We argue that there is a special doping point in the phase diagram of cuprates, such that the condensation of holes into a charge-ordered and a superconducting phase are degenerate in energy but with an energy barrier in between. We present Monte Carlo simulations of a phenomenological XXZ model for this problem without and with quenched disorder in two dimensions. While in the clean case charge order and superconductivity are separated by a first-order line which is nearly independent of temperature, in the presence of quenched disorder charge order is fragmented into domains separated by superconducting filaments reminiscent of the supersolid behaviour in $^4$He. Assuming weak interlayer couplings, the resulting phase diagram of the three-dimensional system is in good agreement with the experiments.
Cited by 1
Authors / Affiliations: mappings to Contributors and Organizations
See all Organizations.- 1 Giulia Venditti,
- 2 Ilaria Maccari,
- 3 4 José Lorenzana,
- 3 4 Sergio Caprara
- 1 Istituto SPIN / Institute for superconductors, oxides and other innovative materials and devices [SPIN]
- 2 Stockholm University [Univ Stockholm]
- 3 Sapienza – Università di Roma / Sapienza University of Rome
- 4 Istituto dei Sistemi Complessi [ICS]
- Carl Tryggers Stiftelse för Vetenskaplig Forskning
- Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET)
- Ministero dell'Università e della Ricerca
- Ministero dell’Istruzione, dell’Università e della Ricerca (MIUR) (through Organization: Ministero dell'Istruzione, dell'Università e della Ricerca / Ministry of Education, Universities and Research [MIUR])
- National Science Foundation [NSF]
- Sapienza Università di Roma (through Organization: Sapienza – Università di Roma / Sapienza University of Rome)