Quantum oscillations in the heavy-fermion compound YbPtBi
- Ames Lab., Ames, IA (United States); Simon Fraser Univ., Burnaby, BC (Canada)
- Ames Lab., Ames, IA (United States)
We present quantum oscillations observed in the heavy-fermion compound YbPtBi in magnetic fields far beyond its field-tuned, quantum critical point. Quantum oscillations are observed in magnetic fields as low as 60 kOe at 60 mK and up to temperatures as high as 3 K, which confirms the very high quality of the samples as well as the small effective mass of the conduction carriers far from the quantum critical point. Although the electronic specific heat coefficient of YbPtBi reaches ~7.4 J/molK2 in zero field, which is one of the highest effective mass values among heavy-fermion systems, we suppress it quickly by an applied magnetic field. The quantum oscillations were used to extract the quasiparticle effective masses of the order of the bare electron mass, which is consistent with the behavior observed in specific heat measurements. Furthermore, such small effective masses at high fields can be understood by considering the suppression of Kondo screening.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC02-07CH11358
- OSTI ID:
- 1227384
- Alternate ID(s):
- OSTI ID: 1212328
- Report Number(s):
- IS-J-8784; PRBMDO
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 92, Issue 8; ISSN 1098-0121
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Preserved entropy and fragile magnetism
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journal | July 2016 |
Low-temperature elastic properties of YbSbPt probed by ultrasound measurements
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journal | March 2018 |
Preserved entropy and fragile magnetism | text | January 2016 |
Two-channel conduction in YbPtBi | text | January 2017 |
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