Fermi Surface Properties of USi<sub><b>3</b></sub>

Tokiwa, Y.; Harima, Hisatomo; Aoki, Dai; Nojiri, S; Murakawa, Masao; Miyake, Koji; Watanabe, Noriyoshi; Settai, Rikio; Inada, Yuji; Sugawara, Hitoshi; Sato, Hideyuki; Haga, Yoshinori; Yamamoto, E.; Ōnuki, Yoshichika

doi:10.1143/jpsj.69.1105

Cited by 21 publications

(8 citation statements)

References 13 publications

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“…Fermi surface of UGe 3 and USi 3 were well explained under the assumption that 5 f electrons in the U atom are itinerant. 4,5) UAl 3 crystallizes in the AuCu 3 -type crystal structure, in which the U nuclei form a simple cubic sublattice and the Al nuclei occupy each face center of the simple cubic unit cell. The space group is identical to that of the U sublattice, * E-mail address: giappoliano@phys.u-ryukyu.ac.jp i.e., Pm3m.…”

Section: Methods Of Band Calculationmentioning

confidence: 99%

Origin of the Frequency Branch ε of the de Haas–van Alphen Effect in UAl₃

et al. 2011

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UAl 3 is a typical heavy-electron compound which belongs to the valence-fluctuation regime. The major experimental frequency branches of the de Haas-van Alphen effect is explained reasonably well by the large hole sheets of the Fermi surface which were derived on the basis of an itinerant 5 f -electron model. In particular, it is shown by visualizing the extremal electron orbits that one of the major experimental frequency branches, i.e., the branch , can be explained by those orbits which run through the multiplyconnected large hole sheet.

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Section: Methods Of Band Calculationmentioning

confidence: 99%

Origin of the Frequency Branch ε of the de Haas–van Alphen Effect in UAl₃

et al. 2011

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“…But, another possibility to obtain a metallic state is considered here. The Fermi surfaces of USi 3 has been investigated and well explained by using a similar method [5]. Only the discrepancy is the size of the closed µ Fermi surface centered at the M points, which consists of 6d electrons of uranium.…”

Section: Band Structure and Fermi Surfaces Of Thtementioning

confidence: 99%

“…This discrepancy prevents us to get a good starting point to understand the interesting phenomena regarding with UTe 2 . As for nonmagnetic uranium compounds, the Fermi surfaces have been investigated, for examples, UB 12 [3], UPt 3 [4], USi 3 [5], U 3 Ni 3 Sn 4 [6], and UPt 5 [7]. The agreement of the de Haas-van Alphen frequencies between the experiments and theoretical predictions are quite well, but still some discrepancies in the magnitudes are left.…”

Section: Introductionmentioning

confidence: 99%

How to Obtain Fermi Surfaces of UTe₂

Harima

2020

Proceedings of J-Physics 2019: International Conference on Multipole Physics and Related Phenomena

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It has been reported that UTe 2 is a new heavy fermion superconductor, which upper critical field is very anisotropic and huge. A conventional energy band structure calculation predicts UTe 2 is an insulator with a small energy gap, even though UTe 2 behaves a good metal in its normal state. This discrepancy prevents us to get a good starting point to understand the interesting phenomena regarding with UTe 2. In order to obtain a metallic band structure, the energy band structure calculation with a slight upward shift of the 5 f electron level, have been carried out. The energy band structure and Fermi surfaces of ThTe 2 , in which U is replaced by Th in the UTe 2 crystal structure, are also shown. This shows metallic band structure with two-dimensional Fermi surfaces.

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“…When considering the UX 3 (X = pmetal) materials, the size of the p-atom is a very important parameter. In the case of smaller X -ions (Si, Ge) [2], the p-wave function decays slower at the U-site, resulting in strong 5f -p hybridization which leads to lack of magnetic ordering (UGe 3 , USi 3 ) [4,2,3] while larger X -ions (In, Pb) cause the hybridization to be weaker resulting in magnetic ground state (UIn 3 , UPb 3 ) [5,6].…”

Section: Introductionmentioning

confidence: 99%