TY - JOUR
T1 - Fermi surface of LaRu4 P12
T2 - A clue to the origin of the metal-insulator transition in PrRu4 P12
AU - Saha, S. R.
AU - Sugawara, H.
AU - Aoki, Y.
AU - Sato, H.
AU - Inada, Y.
AU - Shishido, H.
AU - Settai, R.
AU - Onuki, Y.
AU - Harima, H.
N1 - Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2005
Y1 - 2005
N2 - We report the de Haas-van Alphen (dHvA) effect and magnetoresistance in the filled-skutterudite superconductor LaRu4 P12, which is a reference material of PrRu4 P12 that exhibits a metal-insulator (M-I) transition at TMI 60 K. The observed dHvA branches for the main Fermi surface (FS) are well explained by the band-structure calculation, using the full potential linearized augmented-plane-wave method with the local-density approximation, suggesting a nesting instability with q= (1,0,0) in the main multiply connected FS as expected also in PrRu4 P12. Observed cyclotron effective masses of (2.6-11.8) m0, which are roughly twice the calculated masses, indicate the large mass enhancement even in the La-skutterudites. Comparing the FS between LaRu4 P12 and PrRu4 P12, an essential role of c-f hybridization cooperating with the FS nesting in driving the M-I transition in PrRu4 P12 is clarified.
AB - We report the de Haas-van Alphen (dHvA) effect and magnetoresistance in the filled-skutterudite superconductor LaRu4 P12, which is a reference material of PrRu4 P12 that exhibits a metal-insulator (M-I) transition at TMI 60 K. The observed dHvA branches for the main Fermi surface (FS) are well explained by the band-structure calculation, using the full potential linearized augmented-plane-wave method with the local-density approximation, suggesting a nesting instability with q= (1,0,0) in the main multiply connected FS as expected also in PrRu4 P12. Observed cyclotron effective masses of (2.6-11.8) m0, which are roughly twice the calculated masses, indicate the large mass enhancement even in the La-skutterudites. Comparing the FS between LaRu4 P12 and PrRu4 P12, an essential role of c-f hybridization cooperating with the FS nesting in driving the M-I transition in PrRu4 P12 is clarified.
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U2 - 10.1103/PhysRevB.71.132502
DO - 10.1103/PhysRevB.71.132502
M3 - Article
AN - SCOPUS:28744437190
SN - 1098-0121
VL - 71
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 13
M1 - 132502
ER -