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Effect of Pressure on Magnetism in Correlated-Electron Systems and the Role of Dimensionality in CenRhIn3n+2 (n=l,2 or ∞)

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Frontiers of High Pressure Research II: Application of High Pressure to Low-Dimensional Novel Electronic Materials

Part of the book series: NATO Science Series ((NAII,volume 48))

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Abstract

Recently, the heavy fermion compound CeRhIn5, which superconducts at the relatively high temperature of 2.1 K at a pressure of 1.7 GPa, has been the subject of a great deal of interest. Some magnetically correlated-eleetron systems are known to superconduct under pressure at a quantum critical point where the magnetic ordering temperature goes to 0 K. The way in which a system approaches this quantum critical point, namely the shape of the magnetic ordering temperature as a function of pressure Tc(P), is due to a competition between magnetic order and the Kondo effect and is clearly seen in the correlated-electron systems CePdSb and YbNiSa It has been proposed that two dimensional systems will superconduct at higher temperature than their three dimensional analogs when the cooper pairing mechanism is magnetic in origin. The system CenRhIn3n+2 (n=1,2 or ∞;) is a perfect candidate to test this hypothesis as the n=∞; system is the well-characterized 3D antiferromagnet CeIn3, while the n=1 and 2 compounds crystallize in a tetragonal (qausi-2D) structure. Field-dependent heat capacity and de Haas-van Alphen measurements have been performed to discern the electronic and magnetic anisotropies in these compounds. The results clearly show that the properties are more two-dimensional as one goes from CeIn3 to CeRnIn3. A comparison of the phase diagram of CeRh1-xIrxIn5 to high temperature superconducting oxides, which also have quasi-2D electronic structures, gives compelling evidence that the Cooper pairing mechanism is identical, namely magnetic in origin, in both systems.

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Authors and Affiliations

  1. University of Nevada, Las Vegas, 4505 S Maryland Pkwy, Las Vegas, NV, 89154-4002, USA

    A.L. Cornelius

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  1. A.L. Cornelius
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Editors and Affiliations

  1. Department of Physics, Colorado State University, Fort Collins, CO, USA

    Hans D. Hochheimer

  2. Institute of Physical and Theoretical Chemistry, Wroclaw University of Technology, Wroclaw, Poland

    Bogdan Kuchta

  3. Department of Chemistry, Colorado State University, Fort Collins, CO, USA

    Peter K. Dorhout

  4. Department of Chemistry, University of Wyoming, Laramie, WY, USA

    Jeffery L. Yarger

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Cornelius, A. (2001). Effect of Pressure on Magnetism in Correlated-Electron Systems and the Role of Dimensionality in CenRhIn3n+2 (n=l,2 or ∞). In: Hochheimer, H.D., Kuchta, B., Dorhout, P.K., Yarger, J.L. (eds) Frontiers of High Pressure Research II: Application of High Pressure to Low-Dimensional Novel Electronic Materials. NATO Science Series, vol 48. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0520-3_30

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  • DOI: https://doi.org/10.1007/978-94-010-0520-3_30

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-1-4020-0160-4

  • Online ISBN: 978-94-010-0520-3

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