تقرير
One-Dimensional Quantum Magnetism in the S = 1/2 Mo(V) system, KMoOP2O7
| العنوان: | One-Dimensional Quantum Magnetism in the S = 1/2 Mo(V) system, KMoOP2O7 |
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| المؤلفون: | Abdeldaim, Aly H., Tsirlin, Alexander A., Ollivier, Jacques, Ritter, Clemens, Fortes, Dominic, Perry, Robin S., Clark, Lucy, Nilsen, Gøran J. |
| سنة النشر: | 2022 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Materials Science |
| الوصف: | We present a comprehensive experimental and ab-initio study of the $S=1/2$ Mo$^{5+}$ system, KMoOP$_2$O$_7$, and show that it realizes the $S = 1/2$ Heisenberg chain antiferromagnet model. Powder neutron diffraction reveals that KMoOP$_2$O$_7$ forms a magnetic network comprised of pairs of Mo$^{5+}$ chains within its monoclinic $P2_1/n$ structure. Antiferromagnetic interactions within the Mo$^{5+}$ chains are identified through magnetometry measurements and confirmed by analysis of the magnetic specific heat. The latter reveals a broad feature centred on $T_\textrm{N} = 0.54$ K, which we ascribe to the onset of long-range antiferromagnetic order. No magnetic Bragg scattering is observed in powder neutron diffraction data collected at 0.05 K, however, which is consistent with a strongly suppressed ordered moment with an upper limit $\mu_\textrm{ord} < 0.15 \mu_\textrm{B}$. The one-dimensional character of the magnetic correlations in KMoOP$_2$O$_7$ is verified through analysis of inelastic neutron scattering data, resulting in a model with $J_\textrm{1} \approx 34$ K and $J_\textrm{2} \approx -2$ K for the intrachain and interchain exchange interactions, respectively. The origin of these experimental findings are addressed through density-functional theory calculations. Comment: 10 pages, 7 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.107.014415 |
| URL الوصول: | http://arxiv.org/abs/2207.01284 |
| رقم الأكسشن: | edsarx.2207.01284 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.107.014415 |
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