Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2009-08-04
Phys. Rev. B 80, 014433 (2009)
Physics
Condensed Matter
Strongly Correlated Electrons
7 pages, 5 figures
Scientific paper
The low-carrier ordered phase below the metal-non-metal transition temperature T_MI ~ 63 K of PrRu4P12 is explored by probing magnetoresistance, magnetic susceptibility, thermoelectric power, and Hall effect on high quality single crystals. All the measured properties exhibit the signature of decimation of the Fermi surface below T_MI and anomalous behaviors below 30 K including a large thermoelectric power ~-200 uV/K and a giant negative magnetoresistance (93% at ~0.4 K). The results indicate an additional structure below 30 K and a semimetal-like ground state. The observed anomalous behaviors are most likely associated with the novel role of c-f hybridization between conduction electrons and Pr 4f electrons, whose crystalline electric field level schemes show drastic change below T_MI.
Aoki Yasumichi
Namiki Takahiro
Saha Shanta Ranjan
Sato Haruo
Sugawara Hirotaka
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