| Autor: |
Zvyagin, S. A., Graf, D., Sakurai, T., Kimura, S., Nojiri, H., Wosnitza, J., Ohta, H., Ono, T., Tanaka, H. |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
Nature Communications 10,1064 (2019) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1038/s41467-019-09071-7 |
| Popis: |
Quantum triangular-lattice antiferromagnets are important prototype systems to investigate phenomena of the geometrical frustration in condensed matter. Apart from highly unusual magnetic properties, they possess a rich phase diagram (ranging from an unfrustrated square lattice to a quantum spin liquid), yet to be confirmed experimentally. One major obstacle in this area of research is the lack of materials with appropriate (ideally tuned) magnetic parameters. Using Cs$_2$CuCl$_4$ as a model system, we demonstrate an alternative approach, where, instead of the chemical composition, the spin Hamiltonian is altered by hydrostatic pressure. The approach combines high-pressure electron spin resonance and magnetization measurements, allowing us not only to quasi-continuously tune the exchange parameters, but also to accurately monitor them. Our experiments indicate a substantial increase of the exchange coupling ratio from 0.3 to 0.42 at a pressure of 1.8 GPa, revealing a number of emergent field-induced phases. |
| Databáze: |
arXiv |
| Externí odkaz: |
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