| Autor: |
Philippe, J., Elson, F., Casati, M. P. N., Sanz, S., Metzelaars, M., Shliakhtun, O., Forslund, O. K., Lass, J., Shiroka, T., Linden, A., Mazzone, D. G., Ollivier, J., Shin, S., Medarde, M., Lake, B., Mansson, M., Bartkowiak, M., Normand, B., Kögerler, P., Sassa, Y., Janoschek, M., Simutis, G. |
| Rok vydání: |
2024 |
| Předmět: |
|
| Druh dokumentu: |
Working Paper |
| Popis: |
Low-dimensional quantum magnets are a versatile materials platform for studying the emergent many-body physics and collective excitations that can arise even in systems with only short-range interactions. Understanding their low-temperature structure and spin Hamiltonian is key to explaining their magnetic properties, including unconventional quantum phases, phase transitions, and excited states. We study the metal-organic coordination compound (C$_5$H$_9$NH$_3$)$_2$CuBr$_4$ and its deuterated counterpart, which upon its discovery was identified as a candidate two-leg quantum ($S = 1/2$) spin ladder in the strong-leg coupling regime. By growing large single crystals and probing them with both bulk and microscopic techniques, we deduce that two previously unknown structural phase transitions take place between 136 K and 113 K. The low-temperature structure has a monoclinic unit cell giving rise to two inequivalent spin ladders. We further confirm the absence of long-range magnetic order down to 30 mK and discuss the implications of this two-ladder structure for the magnetic properties of (C$_5$H$_9$NH$_3$)$_2$CuBr$_4$. |
| Databáze: |
arXiv |
| Externí odkaz: |
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