Abstract
Systematic uniaxial strain studies of have been carried out. By controlling the in-plane lattice parameters a and c independently, we find that both compounds have essentially the same phase diagram in electronic properties, although, under the hydrostatic pressures, they show quite different phase diagrams. The K salt shows the superconductivity like salt under the c-axis uniaxial strain, and the latter undergoes a transition to the density-wave state like the former under the a-axis uniaxial strain. These changes in electronic structures are verified by measuring the angle-dependent magnetoresistance. The electronic properties of these compounds can be systematically understood as a function of the ratio of the in-plane lattice parameters.
- Received 4 December 2000
DOI:https://doi.org/10.1103/PhysRevB.64.155104
©2001 American Physical Society