Abstract
We carried out the de Haas-van Alphen (dHvA) experiment in YbAl 3 with the cubic crystal structure. One of the six dHvA branches, named β with a dHvA frequency of 4.5×10 7 Oe, is nearly spherical in topology and has a large cyclotron mass of 23.9 m 0 . The other branches were observed only in small angular regions centered at symmetrical directions. Their cyclotron masses are in the range from 13.5 to 17.4 m 0 . The topology of the Fermi surface cannot be explained by the conventional band model because the fully occupied 4 f -levels in YbAl 3 are below the Fermi level. A small alteration so as to shift upwards the 4 f -levels is necessary to fit to the experimental dHvA data. These give a direct evidence that the 4 f -electrons form heavy fermions at low temperatures, which is most likely related to the many-body Kondo effect.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
