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Breakdown of Magnetic Order in the Pressurized Kitaev Iridate β-Li₂IrO₃

Title data

Majumder, M. ; Manna, R. S. ; Simutis, G. ; Orain, J. C. ; Dey, T. ; Freund, F. ; Jesche, A. ; Khasanov, R. ; Biswas, P. K. ; Bykova, Elena ; Dubrovinskaia, Natalia ; Dubrovinsky, Leonid ; Yadav, R. ; Hozoi, L. ; Nishimoto, S. ; Tsirlin, A. A. ; Gegenwart, P.:
Breakdown of Magnetic Order in the Pressurized Kitaev Iridate β-Li₂IrO₃.
In: Physical Review Letters. Vol. 120 (2018) . - Art.Nr. 237202.
ISSN 1079-7114
DOI: https://doi.org/10.1103/PhysRevLett.120.237202

Project information

Project financing: Deutsche Forschungsgemeinschaft
Alexander-von-Humboldt Stiftung

Abstract in another language

Temperature-pressure phase diagram of the Kitaev hyperhoneycomb iridate β−Li2IrO3 is explored using magnetization, thermal expansion, magnetostriction, and muon spin rotation measurements, as well as single-crystal x-ray diffraction under pressure and ab initio calculations. The Néel temperature of β−Li2IrO3 increases with the slope of 0.9  K/GPa upon initial compression, but the reduction in the polarization field Hc reflects a growing instability of the incommensurate order. At 1.4 GPa, the ordered state breaks down upon a first-order transition, giving way to a new ground state marked by the coexistence of dynamically correlated and frozen spins. This partial freezing in the absence of any conspicuous structural defects may indicate the classical nature of the resulting pressure-induced spin liquid, an observation paralleled to the increase in the nearest-neighbor off-diagonal exchange Γ under pressure.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Professur Materialphysik und Technologie bei extremen Bedingungen
Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Professur Materialphysik und Technologie bei extremen Bedingungen > Professur Materialphysik und Technologie bei extremen Bedingungen - Univ.-Prof. Dr. Natalia Doubrovinckaia
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 11 Jul 2019 09:08
Last Modified: 11 Jul 2019 09:08
URI: https://eref.uni-bayreuth.de/id/eprint/49908