Field induced dramatic change of the Fermi surface in CeRhIn5

H. Q. Yuan1, L. Jiao1, Y. Chen1, J. L. Zhang1, Y. Kohama2, M. Jaime2,

J. Singleton2, E. Bauer2, Hanoh Lee2, T. Park2,3, J. D. Thompson2

1 Department of Physics, Zhejiang University, Hangzhou 310027, China

2 Los Alamos National Laboratory, Los Alamos, NM87545, USA

3 Department of Physics, Sungkyunkwan University, Suwon 440-746, South Korea


    The heavy fermion family CeTIn5 (T=Co, Rh, Ir) has provided great opportunities to study unconventional superconductivity, quantum criticality and their interplay. In this contribution, we will present the experimental evidence of a magnetic field induced quantum phase transition in CeRhIn5 by measuring the ac specific heat and the de Hass van Alphen effect using the facilities of pulsed magnetic field. We found that the antiferromagnetic transition in CeRhIn5 is eventually suppressed by applying a magnetic field of Hc~50T. Additional Fermi surfaces with much larger dHvA frequencies are observed close to the QCP, but still on the AFM side. Our findings suggest that a SDW-type quantum criticality may exist in CeRhIn5 under high magnetic field.

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