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Robust D-wave pairing correlations in a hole-doped spin-fermion model
Mohammad Moraghebi1, Seiji Yunoki, Adriana Moreo
1Department of Physics, National High Magnetic Field Lab and MARTECH, Florida State University, Tallahassee, FL 32306, USA.
This study numerically investigates pairing correlations in a hole-doped spin-fermion model. Results suggest D-wave superconductivity and optimal correlations at 25% doping, aligning with high-temperature cuprate behavior.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Mechanics
Background:
- Understanding high-temperature superconductivity remains a significant challenge in condensed matter physics.
- Spin-fermion models are crucial for exploring exotic electronic states in correlated materials.
Purpose of the Study:
- To numerically investigate pairing correlations in a hole-doped spin-fermion model.
- To explore the relationship between dynamic stripes and superconductivity.
- To determine optimal doping levels for enhanced superconducting correlations.
Main Methods:
- Numerical simulations on up to 12 x 12 clusters.
- Analysis of pairing correlations within the spin-fermion model.
- Investigation of ground state properties at varying densities.
Main Results:
- Indications of D-wave superconductivity away from half-filling were observed.
- Pairing correlations were strongest perpendicular to dynamic stripes.
- Optimal doping for maximized correlations was found at approximately 25% doping.
- Estimated critical temperature (T(c)) ranged from 100-200 K.
- Static stripe inhomogeneities were found to suppress pairing correlations.
Conclusions:
- The spin-fermion model exhibits D-wave superconductivity, consistent with high-T(c) cuprates.
- Dynamic stripe formation plays a key role in enhancing pairing correlations.
- The findings provide insights into the mechanism of high-temperature superconductivity.
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