Field-induced density wave in the heavy-fermion compound CeRhIn5

Philip J. W. Moll (), Bin Zeng, Luis Balicas, Stanislaw Galeski, Fedor F. Balakirev, Eric D. Bauer and Filip Ronning
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Philip J. W. Moll: Solid State Physics Laboratory, ETH Zurich
Bin Zeng: National High Magnetic Field Laboratory
Luis Balicas: National High Magnetic Field Laboratory
Stanislaw Galeski: Solid State Physics Laboratory, ETH Zurich
Fedor F. Balakirev: National High Magnetic Field Laboratory, LANL
Eric D. Bauer: Los Alamos National Laboratory
Filip Ronning: Los Alamos National Laboratory

Nature Communications, 2015, vol. 6, issue 1, 1-8

Abstract: Abstract Strong electron correlations lead to a variety of distinct ground states, such as magnetism, charge order or superconductivity. Understanding the competitive or cooperative interplay between neighbouring phases is an outstanding challenge in physics. CeRhIn5 is a prototypical example of a heavy-fermion superconductor: it orders anti-ferromagnetically below 3.8 K, and moderate hydrostatic pressure suppresses the anti-ferromagnetic order inducing unconventional superconductivity. Here we show evidence for a phase transition to a state akin to a density wave (DW) under high magnetic fields (>27 T) in high-quality single crystal microstructures of CeRhIn5. The DW is signalled by a hysteretic anomaly in the in-plane resistivity accompanied by non-linear electrical transport, yet remarkably thermodynamic measurements suggest that the phase transition involves only small portions of the Fermi surface. Such a subtle order might be a common feature among correlated electron systems, reminiscent of the similarly subtle charge DW state in the cuprates.

Date: 2015
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DOI: 10.1038/ncomms7663

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