Electronic Structure and Fermiology of PuCoGa$_5$

Details Electronic Structure and Fermiology of PuCoGa$_5$ Electronic Structure and Fermiology of PuCoGa$_5$

2002-12-02

arxiv.org/abs/cond-mat/0212033v2

Phys. Rev. Lett. 90, 207007 (2003).

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, Revtex, with 4 figures embedded in the text. Submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.90.207007

By using a relativistic linear augmented-plane-wave method, we clarify energy band structures and Fermi surfaces of recently discovered plutonium-based superconductor PuCoGa$_5$. We find several cylindrical sheets of Fermi surfaces with large volume, very similar to CeMIn$_5$ (M=Ir and Co) isostructural with PuCoGa$_5$, in spite of different $f$-electron numbers between Ce$^{3+}$ and Pu$^{3+}$ ions. The similarity is understood by a concept of electron-hole conversion in a tight binding model constructed based on the $j$-$j$ coupling scheme. Based on the present results, we provide a possible scenario to explain why a transition temperature is so high as 18.5K in PuCoGa$_5$.

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