Proximate Quantum Spin Liquid on Designer Lattice
| Autor: | David Vanderbilt, Padraic Shafer, Jess H. Brewer, Victor Drouin-Touchette, Xiaoran Liu, Mikhail Kareev, Jak Chakhalian, P. S. Anil Kumar, Elke Arenholz, Sobhit Singh, Srimanta Middey, John W. Freeland, Lin Gu, Banabir Pal, Qinghua Zhang, D. D. Sarma, Lu Li, Yanwei Cao, Tomoya Asaba |
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| Rok vydání: | 2021 |
| Předmět: |
Physics
Condensed matter physics Mechanical Engineering media_common.quotation_subject Degenerate energy levels Relaxation (NMR) Frustration Bioengineering 02 engineering and technology General Chemistry Muon spin spectroscopy 021001 nanoscience & nanotechnology Condensed Matter Physics Lattice (module) Antiferromagnetism Condensed Matter::Strongly Correlated Electrons General Materials Science Quantum spin liquid 0210 nano-technology media_common Spin-½ |
| Zdroj: | Nano letters. 21(5) |
| ISSN: | 1530-6992 |
| Popis: | Complementary to bulk synthesis, here we propose a designer lattice with extremely high magnetic frustration and demonstrate the possible realization of a quantum spin liquid state from both experiments and theoretical calculations. In an ultrathin (111) CoCr2O4 slice composed of three triangular and one kagome cation planes, the absence of a spin ordering or freezing transition is demonstrated down to 0.03 K, in the presence of strong antiferromagnetic correlations in the energy scale of 30 K between Co and Cr sublattices, leading to the frustration factor of ∼1000. Persisting spin fluctuations are observed at low temperatures via low-energy muon spin relaxation. Our calculations further demonstrate the emergence of highly degenerate magnetic ground states at the 0 K limit, due to the competition among multiply altered exchange interactions. These results collectively indicate the realization of a proximate quantum spin liquid state on the synthetic lattice. |
| Databáze: | OpenAIRE |
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