Abstract
The dHvA oscillation was observed clearly in both the normal and superconducting mixed states for UPd2Al3 with the hexagonal structure. Eight kinds of dHvA branches were detected, which are well explained by the results of band calculations based on a fully-relativistic spin-polarized LAPW method. An inner orbit of a band 41-hole Fermi surface, named ζ, has the largest dHvA frequency of 9.45 × 107 Oe and cyclotron mass of 65 m0, reflecting a large electronic specific heat coefficient of 145 mJ/K2·mol. Branch α of a band 40-hole Fermi surface was observed in both the normal and superconducting mixed states, where the dHvA frequency does not change in magnitude between the normal and mixed states. The cyclotron effective mass of branch α is, however, found to be reduced and the corresponding Dingle temperature or scattering rate of the conduction electron increases with decreasing the field in the mixed state. An anisotropic energy gap with a line node for UPd2Al3 is discussed from the angular dependence of the dHvA amplitude in the mixed state.
| Original language | English |
|---|---|
| Pages (from-to) | 3643-3654 |
| Number of pages | 12 |
| Journal | Journal of the Physical Society of Japan |
| Volume | 68 |
| Issue number | 11 |
| Publication status | Published - Nov 1999 |
| Externally published | Yes |
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Keywords
- dHvA
- Fermi surface
- LAPW
- Mixed state
- Superconductivity
- UPdAl
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Fermi surface and de Haas-van Alphen oscillation in both the normal and superconducting mixed states of UPd2Al3. / Inada, Yoshihiko; Yamagami, Hiroshi; Haga, Yoshinori; Sakurai, Kenji; Tokiwa, Yoshihumi; Honma, Tetsuo; Yamamoto, Etsuji; Onuki, Yoshichika; Yanagisawa, Takashi.
In: Journal of the Physical Society of Japan, Vol. 68, No. 11, 11.1999, p. 3643-3654.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Fermi surface and de Haas-van Alphen oscillation in both the normal and superconducting mixed states of UPd2Al3
AU - Inada, Yoshihiko
AU - Yamagami, Hiroshi
AU - Haga, Yoshinori
AU - Sakurai, Kenji
AU - Tokiwa, Yoshihumi
AU - Honma, Tetsuo
AU - Yamamoto, Etsuji
AU - Onuki, Yoshichika
AU - Yanagisawa, Takashi
PY - 1999/11
Y1 - 1999/11
N2 - The dHvA oscillation was observed clearly in both the normal and superconducting mixed states for UPd2Al3 with the hexagonal structure. Eight kinds of dHvA branches were detected, which are well explained by the results of band calculations based on a fully-relativistic spin-polarized LAPW method. An inner orbit of a band 41-hole Fermi surface, named ζ, has the largest dHvA frequency of 9.45 × 107 Oe and cyclotron mass of 65 m0, reflecting a large electronic specific heat coefficient of 145 mJ/K2·mol. Branch α of a band 40-hole Fermi surface was observed in both the normal and superconducting mixed states, where the dHvA frequency does not change in magnitude between the normal and mixed states. The cyclotron effective mass of branch α is, however, found to be reduced and the corresponding Dingle temperature or scattering rate of the conduction electron increases with decreasing the field in the mixed state. An anisotropic energy gap with a line node for UPd2Al3 is discussed from the angular dependence of the dHvA amplitude in the mixed state.
AB - The dHvA oscillation was observed clearly in both the normal and superconducting mixed states for UPd2Al3 with the hexagonal structure. Eight kinds of dHvA branches were detected, which are well explained by the results of band calculations based on a fully-relativistic spin-polarized LAPW method. An inner orbit of a band 41-hole Fermi surface, named ζ, has the largest dHvA frequency of 9.45 × 107 Oe and cyclotron mass of 65 m0, reflecting a large electronic specific heat coefficient of 145 mJ/K2·mol. Branch α of a band 40-hole Fermi surface was observed in both the normal and superconducting mixed states, where the dHvA frequency does not change in magnitude between the normal and mixed states. The cyclotron effective mass of branch α is, however, found to be reduced and the corresponding Dingle temperature or scattering rate of the conduction electron increases with decreasing the field in the mixed state. An anisotropic energy gap with a line node for UPd2Al3 is discussed from the angular dependence of the dHvA amplitude in the mixed state.
KW - dHvA
KW - Fermi surface
KW - LAPW
KW - Mixed state
KW - Superconductivity
KW - UPdAl
UR - http://www.scopus.com/inward/record.url?scp=0033272441&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0033272441&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0033272441
VL - 68
SP - 3643
EP - 3654
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 11
ER -