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Pair-density-wave correlations in the Kondo-Heisenberg model
Erez Berg1, Eduardo Fradkin, Steven A Kivelson
1Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
Physical Review Letters
|January 15, 2011
Summary
The one-dimensional Kondo-Heisenberg model
Area of Science:
- Condensed Matter Physics
- Quantum Materials
- Theoretical Physics
Background:
- The one-dimensional Kondo-Heisenberg model describes interacting electrons and magnetic impurities.
- Understanding exotic electronic phases is crucial for novel material design.
- High-temperature superconductors exhibit complex intertwined orders.
Purpose of the Study:
- To investigate the superconducting correlations in the spin-gapped phase of the Kondo-Heisenberg model.
- To compare these correlations with the pair-density-wave state observed in cuprates.
- To elucidate the interplay between spin, charge, and superconducting orders.
Main Methods:
- Density-matrix renormalization-group (DMRG) calculations.
- Field-theoretic arguments.
- Analysis of quasi-long-range superconducting correlations.
Main Results:
- The spin-gapped phase exhibits superconducting correlations only at a nonzero momentum.
- Local correlations resemble the pair-density-wave state.
- Strong intertwining of spin, charge, and superconducting orders is observed.
Conclusions:
- The findings provide insight into the nature of superconductivity in one-dimensional systems.
- The study links theoretical models to experimental observations in high-temperature superconductors.
- The research highlights the importance of momentum-dependent correlations and intertwined orders.
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