Magnetic nanopantograph in the SrCu2(BO3)2 Shastry–Sutherland lattice

Radtke, Guillaume; Saúl, Andrés; Dabkowska, Hanna A.; Salamon, Myron B.; Jaime, Marcelo

doi:10.1073/pnas.1421414112

Title: Magnetic nanopantograph in the SrCu₂(BO₃)₂ Shastry–Sutherland lattice

Journal Article · Mon Feb 02 00:00:00 EST 2015 · Proceedings of the National Academy of Sciences of the United States of America

DOI:https://doi.org/10.1073/pnas.1421414112· OSTI ID:1471322

Radtke, Guillaume ^[1]; Saúl, Andrés ^[2]; Dabkowska, Hanna A. ^[3]; Salamon, Myron B. ^[4];

^[5]

Univ. Pierre et Marie Curie, Paris (France)
Aix-Marseille University (France); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
McMaster Univ., Hamilton, ON (Canada)
Univ. of Texas-Dallas, Richardson, TX (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Magnetic materials having competing, i.e., frustrated, interactions can display magnetism prolific in intricate structures, discrete jumps, plateaus, and exotic spin states with increasing applied magnetic fields. When the associated elastic energy cost is not too expensive, this high potential can be enhanced by the existence of an omnipresent magnetoelastic coupling. Here in this work, we report experimental and theoretical evidence of a nonnegligible magnetoelastic coupling in one of these fascinating materials, SrCu₂(BO₃)₂ (SCBO). First, using pulsed-field transversal and longitudinal magnetostriction measurements we show that its physical dimensions, indeed, mimic closely its unusually rich field-induced magnetism. Second, using density functional-based calculations we find that the driving force behind the magnetoelastic coupling is the CuOCuˆ superexchange angle that, due to the orthogonal Cu²⁺ dimers acting as pantographs, can shrink significantly (0.44%) with minute (0.01%) variations in the lattice parameters. Lastly, with this original approach we also find a reduction of ~10% in the intradimer exchange integral J, enough to make predictions for the highly magnetized states and the effects of applied pressure on SCBO.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1471322

Report Number(s):: LA-UR-14-28761

Journal Information:: Proceedings of the National Academy of Sciences of the United States of America, Vol. 112, Issue 7; ISSN 0027-8424

Publisher:: National Academy of Sciences, Washington, DC (United States)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 29 works

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Emergent bound states and impurity pairs in chemically doped Shastry-Sutherland system Shi, Zhenzhong; Steinhardt, William; Graf, David Nature Communications, Vol. 10, Issue 1 https://doi.org/10.1038/s41467-019-10410-x	journal	June 2019
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Sign switching of dimer correlations in SrCu2(BO3)2 under hydrostatic pressure Bettler, Simon; Stoppel, Lena; Yan, Zewu ETH Zurich https://doi.org/10.3929/ethz-b-000392695	text	January 2020
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Title: Magnetic nanopantograph in the SrCu2(BO3)2 Shastry–Sutherland lattice

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Title: Magnetic nanopantograph in the SrCu₂(BO₃)₂ Shastry–Sutherland lattice