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Journal Article

Spin-density-wave order controlled by uniaxial stress in CeAuSb2

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Sokolov,  D. A.
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Hicks,  C. W.
Clifford Hicks, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Waite, R., Orlandi, F., Sokolov, D. A., Ribeiro, R. A., Canfield, P. C., Manuel, P., et al. (2022). Spin-density-wave order controlled by uniaxial stress in CeAuSb2. Physical Review B, 106(22): 224415, pp. 1-10. doi:10.1103/PhysRevB.106.224415.


Cite as: https://hdl.handle.net/21.11116/0000-000C-73D9-E
Abstract
The tetragonal heavy-fermion compound CeAuSb2 (space group P4/nmm) exhibits incommensurate spin-density wave (SDW) order below TN≈6.5K with the propagation vector qA=(δA,δA,1/2). The application of uniaxial stress along the [010] direction induces a sudden change in the resistivity ratio ρa/ρb at a compressive strain of ϵ≈-0.5%. Here we use neutron scattering to show that the uniaxial stress induces a first-order transition to a SDW state with a different propagation vector (0,δB,1/2) with δB=0.25. The magnetic structure of the new (B) phase consists of Ce layers with ordered moments alternating with layers with zero moment stacked along the c axis. The ordered layers have an up-up-down-down configuration along the b axis. This is an unusual situation in which the loss of spatial inversion in a metallic system is driven by the magnetic order. We argue that the change in SDW wave vector leads to Fermi-surface reconstruction and a concomitant change in the transport properties. © 2022 American Physical Society.