Magnetic-field- and temperature-dependent Fermi surface of CeBiPt

Details Magnetic-field- and temperature-dependent Fermi surface of CeBiPt Magnetic-field- and temperature-dependent Fermi surface of CeBiPt

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006njph....8..174w&link_type=abstract

New Journal of Physics, Volume 8, Issue 9, pp. 174 (2006).

Physics

9

Scientific paper

The half-Heusler compounds CeBiPt and LaBiPt are semimetals with very low charge-carrier concentrations as evidenced by Shubnikov de Haas (SdH) and Hall-effect measurements. Neutron-scattering results reveal a simple antiferromagnetic structure in CeBiPt below TN = 1.15 K. The band structure of CeBiPt sensitively depends on temperature, magnetic field and stoichiometry. Above a certain, sample-dependent, threshold field (B>25 T), the SdH signal disappears and the Hall coefficient reduces significantly. These effects are absent in the non-4f compound LaBiPt. Electronic-band-structure calculations can well explain the observed behaviour by a 4f-polarization-induced Fermi-surface modification.

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