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Kim, Bumjoon
원자제어 저차원 전자계 연구단
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Possible Quantum Paramagnetism in Compressed Sr2IrO4

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Title
Possible Quantum Paramagnetism in Compressed Sr2IrO4
Author(s)
Haskel, Daniel; Fabbris, Gilberto; Kim, JH; Veiga, Larissa S. I.; Mardegan, Jose Rl; Escanhoela Jr, C. A.; Chikara, S; Struzhkin, Viktor V; Senthil, TodadrT; BumJoon Kim; Cao, G; Kim, JW
Subject
ANISOTROPIC SUPEREXCHANGE INTERACTION, ; RAY CIRCULAR-DICHROISM, ; VALENCE-BOND STATE, ; SPIN, ; TEMPERATURE, ; TOPOLOGY, ; PHASE
Publication Date
2020-02
Journal
PHYSICAL REVIEW LETTERS, v.124, no.6, pp.067201
Publisher
AMER PHYSICAL SOC
Abstract
© 2020 American Physical Society. 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://pr.ibs.re.kr/handle/8788114/8375
DOI
10.1103/PhysRevLett.124.067201
ISSN
0031-9007
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > 1. Journal Papers (저널논문)
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