Possible quantum paramagnetism in compressed Sr2IrO4
Name
PhysRevLett.124.067201.pdf
Size
1.21 MB
Format
Adobe PDF
Checksum (MD5)
273c7fdf5e846a123c032d96b033c643
Author(s)
Haskel, D.
Fabbris, G.
Kim, J. H.
Veiga, L. S. I.
Mardegan, J. R. L.
Escanhoela, C. A.
Chikara, S.
Struzhkin, V.
Senthil, T.
Kim, B. J.
Alternative Title
Possible quantum paramagnetism in compressed Sr[subscript 2]IrO[subscript 4]
Date Issued
February 11, 2020
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Haskel, D., et al., "Possible quantum paramagnetism in compressed Sr2IrO4." Physical Review Letters 124, 124 (2020): letter 067201 doi 10.1103/PhysRevLett.124.067201 ©2020 Author(s)
Version
Final published version
Abstract
The effect of compression on the magnetic ground state of Sr[subscript 2]IrO[subscript 4] is studied with x-ray resonant techniques in the diamond anvil cell. The weak interlayer exchange coupling between square-planar 2D IrO[subscript 2] layers is readily modified upon compression, with a crossover between magnetic structures around 7 GPa mimicking the effect of an applied magnetic field at ambient pressure. Higher pressures drive an order-disorder magnetic phase transition with no magnetic order detected above 17–20 GPa. The persistence of strong exchange interactions between J[subscript eff]=1/2 magnetic moments within the insulating IrO[subscript 2] layers up to at least 35 GPa points to a highly frustrated magnetic state in compressed Sr[subscript 2]IrO[subscript 4], opening the door for realization of novel quantum paramagnetic phases driven by extended 5d orbitals with entangled spin and orbital degrees of freedom.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.124.067201
