| Autor: |
Fujihala, M., Koorikawa, H., Mitsuda, S., Morita, K., Tohyama, T., Tomiyasu, K., Koda, A., Okabe, H., Itoh, S., Yokoo, T., Ibuka, S., Tadokoro, M., Itoh, M., Sagayama, H., Kumai, R., Murakami, Y., Nakamura, D. |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
Scientific Reports 7 (2017) 16785 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1038/s41598-017-16935-9 |
| Popis: |
K$_3$Cu$_3$AlO$_2$(SO$_4$)$_4$ is a highly one-dimensional spin-1/2 inequilateral diamond-chain antiferromagnet. Spinon continuum and spin-singlet dimer excitations are observed in the inelastic neutron scattering spectra, which is in excellent agreement with a theoretical prediction: a dimer-monomer composite structure, where the dimer is caused by strong antiferromagnetic (AFM) coupling and the monomer forms an almost isolated quantum AFM chain controlling low-energy excitations. Moreover, muon spin rotation/relaxation spectroscopy shows no long-range ordering down to 90~mK, which is roughly three orders of magnitude lower than the exchange interaction of the quantum AFM chain. K$_3$Cu$_3$AlO$_2$(SO$_4$)$_4$ is, thus, regarded as a compound that exhibits a Tomonaga-Luttinger spin liquid behavior at low temperatures close to the ground state. |
| Databáze: |
arXiv |
| Externí odkaz: |
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