Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session N56: Quantum Spin Liquid Materials III: Kitaev Materials
11:30 AM–2:18 PM,
Wednesday, March 8, 2023
Room: Room 304
Sponsoring
Unit:
GMAG
Chair: Andrej Zorko, Jožef Stefan Institute
Abstract: N56.00007 : Transition signatures in the magnetothermal conductivity of α-RuCl3
1:06 PM–1:18 PM
Presenter:
Etienne Lefrancois
(Universite de Sherbrooke)
Author:
Etienne Lefrancois
(Universite de Sherbrooke)
We observe oscillations in κxx vs B that are characterized by four minima – located at B1, B2, B3 and B4. The first two minima, at B1 ≈ 6 T and B2 ≈ 7.5 T are clearly associated with the end of the antiferromagnetic phase at Bc2 ≈ 7.5 T (and its internal transition at Bc1 ≈ 6 T).
The upper two minima have been attributed to quantum oscillations associated with fermionic excitations (spinons) in a putative quantum spin liquid state, which would end at a threshold field B* ~ 12 T (for B || a) [1], above which κxx(B) is featureless, free of oscillations and constant with field.
In agreement with others [2], we instead attribute the upper minima at B3 and B4 to secondary magnetic transitions, given that we find their anisotropy (B || a vs B || b) to track the anisotropy of the transition field B*.
[1] Czajka et al., Nat. Phys. 17, 915 (2021).
[2] Bruin et al., APL Mat. 10, 090703 (2022).
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