Quasi-two-dimensional Fermi surfaces with localized $f$ electrons in the layered heavy-fermion compound CePt${}_2$In${}_7$

Abstract

We report measurements of the de Haas-van Alphen effect in the layered heavy-fermion compound CePt${}_2$In${}_7$ in high magnetic fields up to 35 T. Above an angle-dependent threshold field, we observed several de Haas-van Alphen frequencies originating from almost ideally two-dimensional Fermi surfaces. The frequencies are similar to those previously observed to develop only above a much higher field of 45 T, where a clear anomaly was detected and proposed to originate from a change in the electronic structure [M. M. Altarawneh et al., Phys. Rev. B 83, 081103 (2011)]. Our experimental results are compared with band structure calculations performed for both CePt${}_2$In${}_7$ and LaPt${}_2$In${}_7$, and the comparison suggests localized $f$ electrons in CePt${}_2$In${}_7$. This conclusion is further supported by comparing experimentally observed Fermi surfaces in CePt${}_2$In${}_7$ and PrPt${}_2$In${}_7$, which are found to be almost identical. The measured effective masses in CePt${}_2$In${}_7$ are only moderately enhanced above the bare electron mass $m_0$, from 2$m_0$ to 6$m_0$.

arXiv comment10 pages, 10 figures, published in Phys. Rev. B

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Cited by in corpus (3)

• Angle-resolved photoemission spectroscopy study of crystal electric field in heavy fermion compound CePt2In7
• Fermi-surface topology of the heavy-fermion system Ce${}_2$PtIn${}_8$
• Quasi-two-dimensional Fermi surfaces of the antiferromagnet U${}_2$RhIn${}_8$ revealed by de Haas-van Alphen measurements