期刊
NANOSCALE HORIZONS
卷 6, 期 6, 页码 474-481出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1nh00043h
关键词
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资金
- Swiss National Science Foundation [200020_172774]
- European Union [844304]
- SINERGIA network Mott physics beyond the Heisenberg model [CRSII2_160765]
- Swiss National Science Foundation (SNF) [200020_172774] Funding Source: Swiss National Science Foundation (SNF)
- Marie Curie Actions (MSCA) [844304] Funding Source: Marie Curie Actions (MSCA)
In this study, grazing-incidence small-angle neutron scattering was used to experimentally quantify the spin-liquid-like correlations in highly-frustrated artificial spin systems. Using a newly-developed empirical structure-factor model, the short-range correlated spin-liquid state was accurately described and shown to be in good agreement with theoretical predictions.
The triangular lattice with Ising magnetic moments is an archetypical example of geometric frustration. In the case of dipolar-coupled out-of-plane moments, the geometric frustration results in a disordered classical spin-liquid state at higher temperatures while the system is predicted to transition to an anti-ferromagnetic stripe ground state at low temperatures. In this work we fabricate artificial triangular Ising spin systems without and with uniaxial in-plane compression to tune the nature and temperature of the correlations. We probe the energy scale and nature of magnetic correlations by grazing-incidence small-angle neutron scattering. In particular, we apply a newly-developed empirical structure-factor model to describe the measured short-range correlated spin-liquid state, and find good agreement with theoretical predictions. We demonstrate that grazing-incidence neutron scattering on our high-quality samples, in conjunction with detailed modeling of the scattering using the Distorted Wave Born Approximation, can be used to experimentally quantify the spin-liquid-like correlations in highly-frustrated artificial spin systems.
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