Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 84, Issue 9, Pages -Publisher
PHYSICAL SOC JAPAN
DOI: 10.7566/JPSJ.84.094711
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Funding
- Ministry of Education, Culture, Sports, Science and Technology, Japan [25610097, 25400342]
- Mitsubishi Foundation
- Grants-in-Aid for Scientific Research [25610097] Funding Source: KAKEN
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We grew single crystals of ullmannite NiSbS and PbBiSe with the cubic chiral structure and carried out electrical resistivity, specific heat, and de Haas-van Alphen (dHvA) experiments to clarify their Fermi surface properties. The Fermi surfaces were found to split into two, reflecting the non-centrosymmetric crystal structure. The splitting energies between the two nearly spherical electron Fermi surfaces named alpha and alpha' were determined as 220K in NiSbS and 1050K in PdBiSe for H parallel to [100] or [001]. This difference in splitting energies between the two compounds originates mainly from the fact that the spin-orbit interactions of Ni-3d, Sb-5p, and S-3p electrons in NiSbS are smaller in magnitude than those of Pd-4d, Bi-6p, and Se-4p electrons in PdBiSe, respectively.
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