CeMnNi4: an impostor half-metal

Abstract

Recent experiments show CeMnNi${}_4$ to have a nearly integer magnetic moment and a relatively large transport spin polarization, as probed by Andreev reflection, suggesting that the material is a half metal or close to it. However, the calculations reported here show that it is not a half metal at all, but rather a semimetal of an unusual nature. Phonon properties should also be quite unusual, with rattling low-frequency Mn modes. Nontrivial transport properties, including a large thermolectric figure of merit, $ZT,$ are predicted in the ferromagnetic state of the well ordered stoichiometric CeMnNi${}_4$

4 pages, 6 figs

References in corpus (2)

• How to calculate the degree of spin polarization in ferromagnets?
• Spin-polarized transport and Andreev reflection in semiconductor/superconductor hybrid structures

Cited by in corpus (4)

• Calculations of spin induced transport in ferromagnets
• Influence of anti-site disorder and electron-electron correlations on the electronic structure of CeMnNi${}_4$
• Ab-inito study on different phases of ferromagnetic CeMnNi4
• Study of CeNi4Mn by neutron diffraction