Enhancement and destruction of spin-Peierls physics in a one-dimensional quantum magnet under pressure
Enhancement and destruction of spin-Peierls physics in a one-dimensional quantum magnet under pressure
The application of pressure reveals a rich phase diagram for the quantum $S=1/2$ spin chain material TiOCl. We performed x-ray diffraction on single-crystal samples in a diamond-anvil cell down to $T=4$ K and pressures up to 14.5 GPa. Remarkably, the magnetic interaction scale increases dramatically with increasing pressure, as indicated …