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http://dx.doi.org/10.4313/JKEM.2019.32.5.399

Electromagnetic Property of a Heavy Fermion CePd2Si2  

Jeong, Tae Seong (College of General Education, Hanshin University)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.32, no.5, 2019 , pp. 399-402 More about this Journal
Abstract
The electromagnetic properties of heavy fermion $CePd_2Si_2$ are investigated using density functional theory using the local density approximation (LDA) and LDA+U methods. The Ce f-bands are located near the Fermi energy and hybridized with the Pd-3d states. This hybridization plays an important role in generating the physical characteristics of this compound. The magnetic moment of $CePd_2Si_2$ calculated within the LDA scheme does not match with the experimental result because of the strong correlation interaction between the f orbitals. The calculation shows that the specific heat coefficient underestimates the experimental value by a factor of 5.98. This discrepancy is attributed to the formation of quasiparticles. The exchange interaction between the local f electrons and the conduction d electrons is the reason for the formation of quasiparticles. The exchange interaction is significant in $CePd_2Si_2$, which makes the quasiparticle mass increase. This enhances the specific heat coefficient.
Keywords
$CePd_2Si_2$; Electronic structure; Magnetic property; Heavy fermion;
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