1. Fermi Surface of the Heavy-fermion Superconductor PrTi2Al20
- Author
-
Hisatomo Harima, Eiich Matsuoka, Dai Aoki, Ai Nakamura, Hitoshi Sugawara, Hisashi Kotegawa, Tomoya Kubo, and Hideki Tou
- Subjects
Condensed Matter::Quantum Gases ,Superconductivity ,Physics ,Condensed matter physics ,Condensed Matter::Other ,General Physics and Astronomy ,Fermi surface ,Heavy fermion superconductor ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect ,01 natural sciences ,010305 fluids & plasmas ,Condensed Matter::Superconductivity ,0103 physical sciences ,Condensed Matter::Strongly Correlated Electrons ,010306 general physics - Abstract
We have investigated the Fermi surface properties in the Pr-based heavy-fermion superconductor PrTi2Al20 and its reference compound LaTi2Al20 by means of the de Haas–van Alphen effect experiments and the band-structure calculation. The topology of Fermi surface in PrTi2Al20 is close to that of the reference compound LaTi2Al20, indicating a localized nature of 4f-electrons. Whereas the localized nature of 4f-electrons, we have confirmed a highly enhanced cyclotron effective mass up to 12 m0 (m0 is a rest mass of electron), which is enhanced about 5 times compared to that in LaTi2Al20.
- Published
- 2020