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(RE)Ba2Cu3O7- and the Roeser-Huber Formula
Anjela Koblischka-Veneva1,2, Michael Rudolf Koblischka1,2
1Experimental Physics, Saarland University, P.O. Box 151150, D-66041 Saarbrücken, Germany.
Materials (Basel, Switzerland)
|October 23, 2021
Summary
The Roeser-Huber formula accurately calculates the superconducting transition temperature (Tc) for rare-earth barium copper oxide (REBCO) materials. This method also predicts the impact of strain and pressure on Tc in thin films.
Area of Science:
- Condensed matter physics
- Materials science
- Superconductivity
Background:
- High-temperature superconductors, specifically rare-earth barium copper oxide (REBCO) materials, exhibit complex superconducting properties.
- Previous work established the Roeser-Huber formula for calculating Tc in YBa2Cu3O7-δ, but challenges remained for samples with higher oxygen doping levels (δ=0.45).
- Understanding the influence of crystallographic data and oxygen arrangements is crucial for accurate Tc prediction.
Purpose of the Study:
- To apply and validate the Roeser-Huber formula for calculating the superconducting transition temperature (Tc) across various REBCO compounds.
- To investigate the effects of strain and pressure on Tc in REBCO thin films.
- To elucidate the role of characteristic length (x) in flux pinning and the peak effect within REBCO systems.
Main Methods:
- Utilizing the Roeser-Huber formula, incorporating electronic configuration and crystallographic data of REBCO materials.
- Analyzing literature data on crystallographic properties of various REBCO compounds.
- Calculating Tc for different REBCO systems and simulating the effects of strain and pressure on thin film samples.
Main Results:
- The Roeser-Huber formula successfully calculates Tc for a range of REBCO compounds, addressing previous limitations with oxygen doping.
- The study demonstrates the formula's capability to predict the influence of strain and pressure on Tc in REBCO thin films.
- A characteristic length (x) was determined for REBCO systems, correlating with pinning site size and flux pinning phenomena.
Conclusions:
- The Roeser-Huber formula provides a robust method for predicting Tc in REBCO materials, considering crystallographic and electronic factors.
- Strain and pressure significantly influence Tc in REBCO thin films, as predicted by the formula.
- The characteristic length (x) offers insights into flux pinning mechanisms and the peak effect in REBCO superconductors.
Keywords:
Roeser–Huber formulacupratesflux pinningoxygen distributionrare earthssuperconductorstransition temperature TcMore Related Videos
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