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Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
Self-localization of composite spin-lattice polarons
Peter Prelovsek1, Roland Zeyher, Peter Horsch
1Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany.
Physical Review Letters
|April 12, 2006
Summary
Self-localization of holes in the Holstein t-J model is hindered by increasing J, primarily due to incoherent hole motion. Antiferromagnetic order persists even with significant hole doping, impacting cuprate materials.
Area of Science:
- Condensed Matter Physics
- Quantum Mechanics
- Materials Science
Background:
- The Holstein t-J model describes strongly correlated electrons interacting with lattice vibrations.
- Understanding hole self-localization is crucial for explaining properties of materials like cuprates.
Purpose of the Study:
- Investigate the conditions for self-localization of holes in the Holstein t-J model.
- Determine the influence of model parameters on hole localization phenomena.
Main Methods:
- Utilized exact diagonalization techniques.
- Employed the retraceable path approximation for analysis.
Main Results:
- The critical electron-phonon coupling (lambda c) decreases as the parameter J increases.
- Incoherent hole motion plays a more significant role in localization than coherent motion.
- Spin correlation functions suggest antiferromagnetic order can survive substantial hole doping.
Conclusions:
- Hole self-localization in the Holstein t-J model is sensitive to the interplay between electron-phonon coupling and magnetic interactions.
- The findings suggest limitations for hole self-localization in lightly doped cuprate superconductors.
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