Unusual charge density wave transition and absence of magnetic ordering in ${\mathrm{Er}}_{2}{\mathrm{Ir}}_{3}{\mathrm{Si}}_{5}$

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Unusual charge density wave transition and absence of magnetic ordering in ${Er}_{2} {Ir}_{3} {Si}_{5}$

Sitaram Ramakrishnan, Andreas Schönleber, Toms Rekis, Natalija van Well, Leila Noohinejad, Sander van Smaalen, Martin Tolkiehn, Carsten Paulmann, Biplab Bag, Arumugam Thamizhavel, Dilip Pal, and Srinivasan Ramakrishnan

Phys. Rev. B 101, 060101(R) – Published 10 February 2020

Abstract

The first-order charge density wave (CDW) phase transition of ${Er}_{2} {Ir}_{3} {Si}_{5}$ is characterized by a crystal structure analysis, and electrical resistivity, magnetic susceptibility and specific heat measurements. The incommensurate CDW is accompanied by a strong lattice distortion, from which it is shown that the CDW resides on zigzag chains of iridium atoms. The CDW transition affects the magnitude of the local magnetic moments on ${Er}^{3 +}$ , implying strong coupling between CDW and magnetism. This could account for the observation that magnetic order is suppressed down to at least 0.1 K in the high-quality single crystal presently studied. Any disorder in the crystallinity, as in ceramic material, broadens and suppresses the CDW transition, while magnetic order appears at 2.1 K.

Received 1 December 2019
Accepted 27 January 2020

DOI:https://doi.org/10.1103/PhysRevB.101.060101

Physics Subject Headings (PhySH)

Charge density waves Crystal structure Metal-insulator transition Peierls transition

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Sitaram Ramakrishnan¹, Andreas Schönleber ¹, Toms Rekis ¹, Natalija van Well ^1,*, Leila Noohinejad^1,†, Sander van Smaalen ^1,‡, Martin Tolkiehn², Carsten Paulmann³, Biplab Bag⁴, Arumugam Thamizhavel⁴, Dilip Pal⁵, and Srinivasan Ramakrishnan^4,§

¹Laboratory of Crystallography, University of Bayreuth, 95447 Bayreuth, Germany
²P24, PETRA III, DESY, 22607 Hamburg, Germany
³Mineralogisch-Petrographisches Institut, Universität Hamburg, 20146 Hamburg, Germany
⁴Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Mumbai 400005, India
⁵Department of Physics, Indian Institute of Technology, Guwahati 781039, India

^*Present address: Department for Earth- and Environmental Sciences, Crystallography Section, Ludwig-Maximilians-University Munich, 80333 Munich, Germany.
^†Present address: P24, PETRA III, DESY, 22607 Hamburg, Germany.
^‡smash@uni-bayreuth.de
^§ramky@tifr.res.in

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Vol. 101, Iss. 6 — 1 February 2020

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Physical Review B

covering condensed matter and materials physics

Unusual charge density wave transition and absence of magnetic ordering in ${Er}_{2} {Ir}_{3} {Si}_{5}$

Sitaram Ramakrishnan, Andreas Schönleber, Toms Rekis, Natalija van Well, Leila Noohinejad, Sander van Smaalen, Martin Tolkiehn, Carsten Paulmann, Biplab Bag, Arumugam Thamizhavel, Dilip Pal, and Srinivasan Ramakrishnan

Phys. Rev. B 101, 060101(R) – Published 10 February 2020

Abstract

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Physical Review B

covering condensed matter and materials physics

Unusual charge density wave transition and absence of magnetic ordering in Er2Ir3Si5

Sitaram Ramakrishnan, Andreas Schönleber, Toms Rekis, Natalija van Well, Leila Noohinejad, Sander van Smaalen, Martin Tolkiehn, Carsten Paulmann, Biplab Bag, Arumugam Thamizhavel, Dilip Pal, and Srinivasan Ramakrishnan

Phys. Rev. B 101, 060101(R) – Published 10 February 2020

Abstract

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Unusual charge density wave transition and absence of magnetic ordering in ${Er}_{2} {Ir}_{3} {Si}_{5}$