Related Experiment Videos
Competition between antiferromagnetism and superconductivity in high-Tc cuprates
David Sénéchal1, P-L Lavertu, M-A Marois
1Département de Physique and Regroupement Québécois sur les Matériaux de Pointe, Université de Sherbrooke, Sherbrooke, Québec, Canada J1K 2R1.
Physical Review Letters
|May 21, 2005
Summary
This study investigates the interplay between d-wave superconductivity and antiferromagnetism in a Hubbard model. Large-scale calculations reveal key features of high-temperature superconductors, aiding experimental observation.
Area of Science:
- Condensed Matter Physics
- Quantum Materials Science
Background:
- The Hubbard model is crucial for understanding strongly correlated electron systems.
- High-temperature superconductivity (HTS) and antiferromagnetism (AF) are competing phenomena in cuprates.
Purpose of the Study:
- To investigate the competition between d-wave superconductivity (dSC) and antiferromagnetism (AF).
- To reproduce the ground-state phase diagram and excitation spectra of high-temperature superconductors using the t-t(\\')-t(\\')-U Hubbard model.
Main Methods:
- Variational cluster perturbation theory (VCPT).
- Large-scale computer calculations.
Main Results:
- Reproduced the ground-state phase diagram of high-temperature superconductors.
- Calculated one-particle excitation spectra for both hole and electron doping.
- Identified clear signatures of the Mott gap, AF, and dSC.
Conclusions:
- The study provides a theoretical framework for understanding the complex phase diagram of HTS.
- Identified experimental signatures observable in photoemission spectroscopy.