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Spin fluctuations, Fermi surface hotspots and nesting in PuCoGa5

Published online by Cambridge University Press:  01 May 2014

Matthias J. Graf ,
Tanmoy Das  and
Jian-Xin Zhu
Matthias J. Graf
Affiliation:
Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, U.S.A.
Tanmoy Das
Affiliation:
Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, U.S.A.
Jian-Xin Zhu
Affiliation:
Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, U.S.A.
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Abstract

Surprisingly little is known about the mechanism and symmetry of superconducting pairing in PuCoGa5. A common thread with other unconventional superconductors is the presence of spin fluctuations in the normal state, which in this particular case is controlled by strong spin–orbit coupling split bands. The many and anisotropic Fermi surfaces make the guessing of the potential spin-fluctuation nesting vector and resulting symmetry of the pairing function a nontrivial task. To provide much needed guidance for the identification of the pairing symmetry in this multiband superconductor, we perform first-principles based magnetic spin susceptibility calculations to identify the dominant nesting vectors that potentially give rise to interband pairing with nodal d- or s±-wave gap functions.

Keywords

electronic structuresuperconductingmagnetic properties
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1683: Symposium S – Advanced Materials for Rechargeable Batteries , 2014 , mrss14-1683-s02-01
Copyright
Copyright © Materials Research Society 2014 

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