%0 Journal Article %1 PhysRevResearch.6.023043 %A Ranjith, K. M. %A Povarov, K. Yu. %A Yan, Z. %A Zheludev, A. %A Horvatić, M. %D 2024 %I American Physical Society %J Phys. Rev. Res. %K b %N 2 %P 023043 %R 10.1103/PhysRevResearch.6.023043 %T Narrowly avoided spin-nematic phase BaCdVO(PO$_4$)$_2$: NMR evidence %U https://link.aps.org/doi/10.1103/PhysRevResearch.6.023043 %V 6 %X We present a $^31P$ NMR investigation of $BaCdVO(PO_4)_2$ focusing on the nearly saturated regime between $\mu_0H_c1=4.05\rule0.16em0exT$ and $\mu_0H_c2=6.5\rule0.16em0exT$, which used to be considered a promising candidate for a spin-nematic phase. NMR spectra establish the absence of any dipolar order there, whereas the weak field dependence of the magnetization above $H_c1$ is accounted for by Dzyaloshinskii-Moriya interaction terms. The low-energy spin dynamics (fluctuations), measured by the nuclear spin-lattice relaxation rate $T_1^-1$, confirms the continuity of this phase and the absence of any low-temperature phase transition. Unexpectedly, the spin dynamics above $H_c1$ is largely dominated by two-magnon processes, which is expected above the saturation field of a spin-nematic phase, but not inside. This shows that $BaCdVO(PO_4)_2$ is indeed close to a spin-nematic instability; however, this phase is not stabilized. We thus confirm recent theoretical predictions that the spin-nematic phase can be stabilized, at most, in an extremely narrow field range close to saturation or is rather narrowly avoided Jiang et al., Phys. Rev. Lett. 130, 116701 (2023).

@article{PhysRevResearch.6.023043, abstract = {We present a $^{31}\mathrm{P}$ NMR investigation of $\mathrm{BaCdVO}{({\mathrm{PO}}_{4})}_{2}$ focusing on the nearly saturated regime between ${\ensuremath{\mu}}_{0}{H}_{c1}=4.05\phantom{\rule{0.16em}{0ex}}\mathrm{T}$ and ${\ensuremath{\mu}}_{0}{H}_{c2}=6.5\phantom{\rule{0.16em}{0ex}}\mathrm{T}$, which used to be considered a promising candidate for a spin-nematic phase. NMR spectra establish the absence of any dipolar order there, whereas the weak field dependence of the magnetization above ${H}_{c1}$ is accounted for by Dzyaloshinskii-Moriya interaction terms. The low-energy spin dynamics (fluctuations), measured by the nuclear spin-lattice relaxation rate ${T}_{1}^{\ensuremath{-}1}$, confirms the continuity of this phase and the absence of any low-temperature phase transition. Unexpectedly, the spin dynamics above ${H}_{c1}$ is largely dominated by two-magnon processes, which is expected above the saturation field of a spin-nematic phase, but not inside. This shows that $\mathrm{BaCdVO}{({\mathrm{PO}}_{4})}_{2}$ is indeed close to a spin-nematic instability; however, this phase is not stabilized. We thus confirm recent theoretical predictions that the spin-nematic phase can be stabilized, at most, in an extremely narrow field range close to saturation or is rather narrowly avoided [Jiang et al., Phys. Rev. Lett. 130, 116701 (2023)].}, added-at = {2024-05-14T17:07:35.000+0200}, author = {Ranjith, K. M. and Povarov, K. Yu. and Yan, Z. and Zheludev, A. and Horvatić, M.}, biburl = {https://www.bibsonomy.org/bibtex/2df4ffae4ebc351e2b9f7da68f22e9a4c/ctqmat}, day = 11, description = {Phys. Rev. Research 6, 023043 (2024) - Narrowly avoided spin-nematic phase in $\mathrm{BaCdVO}{({\mathrm{PO}}_{4})}_{2}: \mathrm{NMR}$ evidence}, doi = {10.1103/PhysRevResearch.6.023043}, interhash = {1c0b4a8ce04504fb596ffa68ff705e95}, intrahash = {df4ffae4ebc351e2b9f7da68f22e9a4c}, journal = {Phys. Rev. Res.}, keywords = {b}, month = {04}, number = 2, numpages = {8}, pages = 023043, publisher = {American Physical Society}, timestamp = {2024-05-14T17:07:35.000+0200}, title = {Narrowly avoided spin-nematic phase BaCdVO(PO$_{\mathbf{4}}$)$_{\mathbf{2}}$: NMR evidence}, url = {https://link.aps.org/doi/10.1103/PhysRevResearch.6.023043}, volume = 6, year = 2024 }