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Title: Emergent bound states and impurity pairs in chemically doped Shastry-Sutherland system

Abstract

Impurities often play a defining role in the ground states of frustrated quantum magnets. Studies of their effects are crucial in understanding of the phase diagram in these materials. SrCu2(BO3)2, an experimental realization of the Shastry-Sutherland (SS) lattice, provides a unique model system for such studies using both experimental and numerical approaches. Here we report effects of impurities on the crystals of bound states, and doping-induced emergent ground states in Mg-doped SrCu2(BO3)2, which remain stable in high magnetic fields. Using four complementary magnetometry techniques and theoretical simulations, a rich impurity-induced phenomenology at high fields is discovered. The results demonstrate a rare example in which even a small doping concentration interacts strongly with both triplets and bound states of triplets, and thus plays a significant role in the magnetization process even at high magnetic fields. Our findings provide insights into the study of impurity effects in geometrically frustrated quantum magnets.

Authors:
 [1];  [1];  [2];  [3]; ORCiD logo [2]; ORCiD logo [4]; ORCiD logo [4];  [1];  [5];  [6];  [1]
+ Show Author Affiliations
  1. Duke Univ., Durham, NC (United States)
  2. Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
  3. Univ. of Amsterdam (Netherlands)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  5. McMaster Univ., Hamilton, ON (Canada)
  6. Ecole Polytechnique Federale Lausanne (Switzlerland)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC). Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1526958
Report Number(s):
LA-UR-18-31035
Journal ID: ISSN 2041-1723
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; High Magnetic Field Science

Citation Formats

Shi, Zhenzhong, Steinhardt, William, Graf, David, Corboz, Phillippe, Weickert, Dagmar Franziska, Harrison, Neil, Jaime, Marcelo, Marjerrison, Casey, Dabkowska, Hanna A., Mila, Frederic, and Haravifard, Sara. Emergent bound states and impurity pairs in chemically doped Shastry-Sutherland system. United States: N. p., 2019. Web. doi:10.1038/s41467-019-10410-x.
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Shi, Zhenzhong, Steinhardt, William, Graf, David, Corboz, Phillippe, Weickert, Dagmar Franziska, Harrison, Neil, Jaime, Marcelo, Marjerrison, Casey, Dabkowska, Hanna A., Mila, Frederic, & Haravifard, Sara. Emergent bound states and impurity pairs in chemically doped Shastry-Sutherland system. United States. https://doi.org/10.1038/s41467-019-10410-x
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Shi, Zhenzhong, Steinhardt, William, Graf, David, Corboz, Phillippe, Weickert, Dagmar Franziska, Harrison, Neil, Jaime, Marcelo, Marjerrison, Casey, Dabkowska, Hanna A., Mila, Frederic, and Haravifard, Sara. Tue . "Emergent bound states and impurity pairs in chemically doped Shastry-Sutherland system". United States. https://doi.org/10.1038/s41467-019-10410-x. https://www.osti.gov/servlets/purl/1526958.
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@article{osti_1526958,
title = {Emergent bound states and impurity pairs in chemically doped Shastry-Sutherland system},
author = {Shi, Zhenzhong and Steinhardt, William and Graf, David and Corboz, Phillippe and Weickert, Dagmar Franziska and Harrison, Neil and Jaime, Marcelo and Marjerrison, Casey and Dabkowska, Hanna A. and Mila, Frederic and Haravifard, Sara},
abstractNote = {Impurities often play a defining role in the ground states of frustrated quantum magnets. Studies of their effects are crucial in understanding of the phase diagram in these materials. SrCu2(BO3)2, an experimental realization of the Shastry-Sutherland (SS) lattice, provides a unique model system for such studies using both experimental and numerical approaches. Here we report effects of impurities on the crystals of bound states, and doping-induced emergent ground states in Mg-doped SrCu2(BO3)2, which remain stable in high magnetic fields. Using four complementary magnetometry techniques and theoretical simulations, a rich impurity-induced phenomenology at high fields is discovered. The results demonstrate a rare example in which even a small doping concentration interacts strongly with both triplets and bound states of triplets, and thus plays a significant role in the magnetization process even at high magnetic fields. Our findings provide insights into the study of impurity effects in geometrically frustrated quantum magnets.},
doi = {10.1038/s41467-019-10410-x},
journal = {Nature Communications},
number = 1,
volume = 10,
place = {United States},
year = {Tue Jun 04 00:00:00 EDT 2019},
month = {Tue Jun 04 00:00:00 EDT 2019}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1038/s41467-019-10410-x
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Cited by: 8 works
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Figures / Tables:

Fig. 1 Fig. 1: Magnetization plateaus in Mg-doped SrCu2(BO3)2. a Magnetization (M) vs. field (H ∥ a-axis) for x= 0.02 (magenta), 0.03 (green), and 0.05 (blue), and b magnetostriction ($Δ$L/L) vs. field (H ∥ a-axis) for x= 0 (black), 0.02 (magenta), 0.03 (green), and 0.05 (blue), at T = 0.4 K, conductedmore » in a 65 T multi-shot magnet at the pulsed field facility of the national high magnetic field laboratory (NHMFL). Lower right inset: M(H) for the three dopings at low H, obtained from 60 T shots. Upper left inset: a schematic of the spin-1/2 Cu2+ ions in the SS lattice, as realized in SrCu2(BO3)2. Traces in (b) are shifted for clarity« less
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    Thermodynamic, Dynamic, and Transport Properties of Quantum Spin Liquid in Herbertsmithite from an Experimental and Theoretical Point of View
    journal, August 2019

    • Shaginyan, Vasily R.; Msezane, Alfred Z.; Amusia, Miron Ya.
    • Condensed Matter, Vol. 4, Issue 3
    • DOI: 10.3390/condmat4030075
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