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Plutonium-based superconductivity with a transition temperature above 18 K.

J L Sarrao1, L A Morales, J D Thompson

  • 1Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. sarrao@lanl.gov

Nature
|November 26, 2002
PubMed
Summary

Superconductivity was discovered in plutonium cobalt gallium (PuCoGa5), linked to plutonium

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Mechanics

Background:

  • Plutonium's electronic structure, particularly its 5f electrons, is poorly understood and challenging to model.
  • Plutonium's electronic properties are critical to its metallurgical behavior and technological applications.
  • Understanding plutonium's electronic structure is key to advancing materials science and quantum mechanics.

Purpose of the Study:

  • To investigate the electronic properties of plutonium.
  • To discover new phenomena related to plutonium's unique electronic state.
  • To explore potential links between plutonium's electronic structure and superconductivity.

Main Methods:

  • Experimental synthesis and characterization of PuCoGa5.
  • Measurement of superconductivity transition temperature (Tc) and critical current.
  • Theoretical analysis of electronic structure and its relation to superconductivity.

Main Results:

  • Superconductivity was discovered in PuCoGa5 with a transition temperature (Tc) of approximately 18.5 K.
  • The superconductivity is attributed to plutonium's anomalous electronic properties.
  • PuCoGa5 exhibits a large critical current due to radiation-induced pinning centers.

Conclusions:

  • PuCoGa5 represents a novel class of spin-fluctuation-mediated superconductors.
  • Its high Tc bridges heavy-fermion and high-Tc copper oxide superconductors.
  • The findings offer insights into unconventional superconductivity mechanisms and plutonium's electronic behavior.