| Autor: |
J S, Helton, K, Matan, M P, Shores, E A, Nytko, B M, Bartlett, Y, Yoshida, Y, Takano, A, Suslov, Y, Qiu, J-H, Chung, D G, Nocera, Y S, Lee |
| Rok vydání: |
2006 |
| Zdroj: |
Physical review letters. 98(10) |
| ISSN: |
0031-9007 |
| Popis: |
We have performed thermodynamic and neutron scattering measurements on the S=1/2 kagomé lattice antiferromagnet ZnCu3(OH)6Cl2. The susceptibility indicates a Curie-Weiss temperature of theta CW approximately = -300 K; however, no magnetic order is observed down to 50 mK. Inelastic neutron scattering reveals a spectrum of low energy spin excitations with no observable gap down to 0.1 meV. The specific heat at low-T follows a power law temperature dependence. These results suggest that an unusual spin liquid state with essentially gapless excitations is realized in this kagomé lattice system. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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