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

Published

Journal Article

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.

Full Text

Duke Authors

Cited Authors

  • Shi, Z; Steinhardt, W; Graf, D; Corboz, P; Weickert, F; Harrison, N; Jaime, M; Marjerrison, C; Dabkowska, HA; Mila, F; Haravifard, S

Published Date

  • June 4, 2019

Published In

Volume / Issue

  • 10 / 1

Start / End Page

  • 2439 -

PubMed ID

  • 31164637

Pubmed Central ID

  • 31164637

Electronic International Standard Serial Number (EISSN)

  • 2041-1723

International Standard Serial Number (ISSN)

  • 2041-1723

Digital Object Identifier (DOI)

  • 10.1038/s41467-019-10410-x

Language

  • eng