Simultaneous loss of interlayer coherence and long-range magnetism in quasi-two-dimensional PdCrO2

S. Ghannadzadeh (), S. Licciardello, S. Arsenijević, P. Robinson, H. Takatsu, M. I. Katsnelson and N. E. Hussey ()
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S. Ghannadzadeh: High Field Magnet Laboratory (HFML-EMFL), Faculty of Science, Radboud University
S. Licciardello: High Field Magnet Laboratory (HFML-EMFL), Faculty of Science, Radboud University
S. Arsenijević: High Field Magnet Laboratory (HFML-EMFL), Faculty of Science, Radboud University
P. Robinson: High Field Magnet Laboratory (HFML-EMFL), Faculty of Science, Radboud University
H. Takatsu: Tokyo Metropolitan University
M. I. Katsnelson: Institute of Molecules and Materials, Faculty of Science, Radboud University
N. E. Hussey: High Field Magnet Laboratory (HFML-EMFL), Faculty of Science, Radboud University

Nature Communications, 2017, vol. 8, issue 1, 1-6

Abstract: Abstract In many layered metals, coherent propagation of electronic excitations is often confined to the highly conducting planes. While strong electron correlations and/or proximity to an ordered phase are believed to be the drivers of this electron confinement, it is still not known what triggers the loss of interlayer coherence in a number of layered systems with strong magnetic fluctuations, such as cuprates. Here, we show that a definitive signature of interlayer coherence in the metallic-layered triangular antiferromagnet PdCrO2 vanishes at the Néel transition temperature. Comparison with the relevant energy scales and with the isostructural non-magnetic PdCoO2 reveals that the interlayer incoherence is driven by the growth of short-range magnetic fluctuations. This establishes a connection between long-range order and interlayer coherence in PdCrO2 and suggests that in many other low-dimensional conductors, incoherent interlayer transport also arises from the strong interaction between the (tunnelling) electrons and fluctuations of some underlying order.

Date: 2017
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DOI: 10.1038/ncomms15001

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