Anomalously heavy fermions in YbPdSb
Aliev F. G., Vieira S., Villar R., Kasaya M., Suzuki H., Bonville P.
A study of the specific heat of YbPdSb reveals that the electron component of the specific heat, Ce, divided by the temperature reaches values СeΠ'=3.2 J/(mole-K2) at T—0.5 K. Such values correspond to a record effective mass of delocalized quasiparticles for heavy-fermion systems. A study of the thermal expansion confirms that there is no magnetic transition down to 0.5 K. © 1994 American Institute of Physics.