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Strongly correlated superconductivity in Rh17S15
H R Naren1, A Thamizhavel, A K Nigam
1Tata Institute of Fundamental Research, Mumbai-400005, India.
Physical Review Letters
|February 1, 2008
Summary
Superconductivity was observed in Rh17S15 below 5.4 K, likely caused by strongly correlated charge carriers. Hall coefficient sign changes suggest complex electronic behavior in this rhodium sulfide compound.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Solid State Chemistry
Background:
- Superconductivity is a quantum mechanical phenomenon where a material can conduct electricity with zero resistance.
- Understanding the mechanisms behind superconductivity in novel materials is crucial for technological advancements.
Purpose of the Study:
- To investigate the superconducting properties of a polycrystalline Rh17S15 sample.
- To elucidate the underlying mechanism responsible for superconductivity in this compound.
Main Methods:
- Resistivity measurements
- Magnetic susceptibility studies
- Heat capacity analysis
- Upper critical field determination
- Hall coefficient measurements
Main Results:
- The Rh17S15 sample exhibits superconductivity with a critical temperature (Tc) below 5.4 K.
- Strongly correlated charge carriers, likely due to a high density of Rh d bands at the Fermi level, are suggested as the source of superconductivity.
- A sign change and low-temperature increase in the Hall coefficient were observed prior to the onset of superconductivity.
Conclusions:
- The findings indicate that Rh17S15 is a superconductor with a Tc below 5.4 K.
- The superconductivity is attributed to strong electron correlations.
- The observed Hall coefficient behavior provides insights into the electronic structure and charge carrier dynamics of Rh17S15.
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