Quasi-two-dimensional Fermi surfaces with localized f electrons in the layered heavy-fermion compound CePt2In7

被引:3
作者
Goetze, K. [1 ,2 ,8 ]
Krupko, Y. [3 ]
Bruin, J. A. N. [4 ]
Klotz, J. [1 ,2 ]
Hinlopen, R. D. H. [4 ]
Ota, S. [5 ]
Hirose, Y. [6 ]
Harima, H. [7 ]
Settai, R. [6 ]
McCollam, A. [4 ]
Sheikin, I. [3 ]
机构
[1] Helmholtz Zentrum Dresden Rossendorf, Hochfeld Magnetlabor Dresden HLD EMFL, D-01314 Dresden, Germany
[2] Tech Univ Dresden, D-01314 Dresden, Germany
[3] UGA, CNRS, Lab Natl Champs Magnet Intenses LNCMI EMFL, F-38042 Grenoble, France
[4] Radboud Univ Nijmegen, High Field Magnet Lab HFML EMFL, NL-6525 ED Nijmegen, Netherlands
[5] Niigata Univ, Grad Sch Sci & Technol, Niigata 9502181, Japan
[6] Niigata Univ, Fac Sci, Niigata 9502181, Japan
[7] Kobe Univ, Grad Sch Sci, Kobe, Hyogo 6578501, Japan
[8] Univ Warwick, Dept Phys, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands, England
关键词
QUANTUM PHASE-TRANSITIONS; CRITICAL PRESSURE; SUPERCONDUCTIVITY; CRITICALITY; RH;
D O I
10.1103/PhysRevB.96.075138
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We report measurements of the de Haas-van Alphen effect in the layered heavy-fermion compound CePt2In7 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 CePt2In7 and LaPt2In7, and the comparison suggests localized f electrons in CePt2In7. This conclusion is further supported by comparing experimentally observed Fermi surfaces in CePt2In7 and PrPt2In7, which are found to be almost identical. The measured effective masses in CePt2In7 are only moderately enhanced above the bare electron mass m(0), from 2m(0) to 6m(0).
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页数:9
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