Heisenberg spins on an anisotropic triangular lattice: PdCrO2 under uniaxial stress
| Autor: | Sun, Dan, Sokolov, Dmitry A., Waite, Richard, Khim, Seunghyun, Manuel, Pascal, Orlandi, Fabio, Khalyavin, Dmitry D., Mackenzie, Andrew P., Hicks, Clifford W. |
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| Rok vydání: | 2021 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/1367-2630/ac4280 |
| Popis: | When Heisenberg spins interact antiferromagnetically on a triangular lattice and nearest-neighbor interactions dominate, the ground state is 120$^{\circ}$ antiferromagnetism. In this work, we probe the response of this state to lifting the triangular symmetry, through investigation of the triangular antiferromagnet PdCrO$_2$ under uniaxial stress by neutron diffraction and resistivity measurements. The periodicity of the magnetic order is found to change rapidly with applied stress; the rate of change indicates that the magnetic anisotropy is roughly forty times the stress-induced bond length anisotropy. At low stress, the incommensuration period becomes extremely long, on the order of 1000 lattice spacings; no locking of the magnetism to commensurate periodicity is detected. Separately, the magnetic structure is found to undergo a first-order transition at a compressive stress of $\sim$0.4 GPa, at which the interlayer ordering switches from a double- to a single-q structure. Comment: 9 pages, 5 figures, accepted by New Journal of Physics |
| Databáze: | arXiv |
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