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Local magnetic order vs superconductivity in a layered cuprate
1Department of Superconductivity, School of Engineering, University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan.
Physical Review Letters
|September 6, 2000
Summary
The study reveals a direct link between charge-stripe order and superconductivity in La1.6-xNd0.4SrxCuO4. Decreasing charge ordering temperatures correlate with suppressed superconductivity, supporting theories of stripe-driven superconductivity.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Solid State Chemistry
Background:
- La1.6-xNd0.4SrxCuO4 exhibits complex phase diagrams with competing charge-stripe order and superconductivity.
- The anomalous suppression of superconductivity near x = 1/8 is a key phenomenon requiring explanation.
Purpose of the Study:
- To elucidate the phase diagram of charge-stripe order in La1.6-xNd0.4SrxCuO4.
- To investigate the relationship between charge-stripe order and the depression of superconductivity.
Main Methods:
- Neutron scattering studies
- X-ray scattering studies
- Resistivity measurements
- Analysis of in-plane resistivity
- Nuclear-quadrupole-resonance (NQR) studies
Main Results:
- The transition temperature for local charge ordering decreases monotonically with increasing strontium content (x).
- Local antiferromagnetic order is uniquely correlated with the anomalous depression of superconductivity at x ≈ 1/8.
- Charge-stripe order is established as a critical factor influencing superconducting properties.
Conclusions:
- The findings support theoretical models where superconductivity is intrinsically linked to charge-stripe correlations.
- Understanding charge-stripe order is crucial for comprehending the behavior of cuprate superconductors.
- This work provides a detailed phase diagram for charge-stripe order, aiding future research in related materials.
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