A quantum spin liquid is an intriguing exotic state of matter involving a magnetic system in which a magnetically ordered ground state at low temperatures is avoided despite strong interactions between magnetic units, due to quantum fluctuations. Experimental evidence for the existence of such a state has become available, but there are many fundamental questions about this novel state. This study uses an advanced magnetic probing technique, called muon spin rotation, to study a molecular layered system that is widely regarded as a prime candidate for quantum spin liquid. A complex magnetic phase diagram for this system is determined and characteristic critical properties of the spin liquid are measured, thereby providing important new insights into this exotic state of matter.
- F. L. Pratt
- P. J. Baker
- G. Saito
