Pressure-induced novel quantum states in a triangular lattice antiferromagnet.

Quantum antiferromagnets on a triangular lattice are the most important prototype materials to investigate the phenomena of geometrical frustration, quantum fluctuations and magnetic order in solids. Apart from highly unusual magnetic properties, these systems possess a very rich phase diagram ranging from a simple unfrustrated square lattice to a quantum spin liquid, yet to be confirmed experimentally. On the other hand, almost nothing is known on the pressure-driven evolution of their magnetic properties. Recently, using the high-field TDO techniques, a number of novel field-induced transitions were revealed in the high-pressure phase of the triangular lattice antiferromagnet Cs2CuCl4. The exact nature of the observed field-induced phase transitions are to be clarified by means of magneto-structural studies, which is the main goal of the proposed research.