Possible Quantum Paramagnetism in Compressed Sr2IrO4
SCIE
SCOPUS
- Title
- Possible Quantum Paramagnetism in Compressed Sr2IrO4
- Authors
- Haskel, D.; Fabbris, G.; Kim, J. H.; Veiga, L. S. I.; Mardegan, J. R. L.; Escanhoela, C. A., Jr.; Chikara, S.; Struzhkin, V.; Senthil, T.; KIM, BUMJOON; Cao, G.; Kim, J. -W.
- Date Issued
- 2020-02
- Publisher
- American Physical Society
- Abstract
- The effect of compression on the magnetic ground state of Sr2IrO4 is studied with x-ray resonant techniques in the diamond anvil cell. The weak interlayer exchange coupling between square-planar 2D IrO2 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(eff) = 1/2 magnetic moments within the insulating IrO2 layers up to at least 35 GPa points to a highly frustrated magnetic state in compressed Sr2IrO4, opening the door for realization of novel quantum paramagnetic phases driven by extended 5d orbitals with entangled spin and orbital degrees of freedom.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/103084
- DOI
- 10.1103/PhysRevLett.124.067201
- ISSN
- 0031-9007
- Article Type
- Article
- Citation
- Physical Review Letters, vol. 124, no. 6, 2020-02
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- There are no files associated with this item.
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