Abstract
We present ultra-high-resolution dilatometric studies in magnetic fields on a quasi-two-dimensional organic conductor -(D8-BEDT-TTF)Cu[N(CN)]Br, which is located close to the Mott metal-insulator (MI) transition. The obtained thermal expansion coefficient, , reveals two remarkable features: (i) the Mott MI transition temperature K is insensitive to fields up to 10 T, the highest applied field; (ii) for fields along the interlayer axis, a magnetic field induced (FI) phase transition at K is observed above a threshold field T, indicative of a spin reorientation with strong magnetoelastic coupling.
- Received 29 May 2012
DOI:https://doi.org/10.1103/PhysRevB.86.085130
©2012 American Physical Society