Pressure-Induced Mott Transition in an Organic Superconductor with a Finite Doping Level

X-ray Irradiation-induced Carrier Doping in Organic Mott Insulators

X-ray irradiation usually induces disorders in a crystal, for example, displacement of the atomic position. In the case of molecular materials, the irradiation produces the molecular defects, which are radiolysed by ionizing radiation. This kind of molecular defect permanently remains, while the irradiation damage in inorganic materials in general is only due to atomic displacements which can b...

Pressure-induced insulating state in an organic superconductor

Superconductor to Mott insulator transition in YBa2Cu3O7/LaCaMnO3 heterostructures

The superconductor-to-insulator transition (SIT) induced by means such as external magnetic fields, disorder or spatial confinement is a vivid illustration of a quantum phase transition dramatically affecting the superconducting order parameter. In pursuit of a new realization of the SIT by interfacial charge transfer, we developed extremely thin superlattices composed of high Tc superconductor...

Finite doping signatures of the Mott transition in the two-dimensional Hubbard model.

Experiments on layered materials call for a study of the influence of short-range spin correlations on the Mott transition. To this end, we solve the cellular dynamical mean-field equations for the Hubbard model on a plaquette with continuous-time quantum Monte Carlo calculations. The normal-state phase diagram as a function of temperature T, interaction strength U, and filling n reveals that u...

Pressure-induced superconductor-insulator transition in the spinel compound CuRh2S4.

We performed resistivity measurements in CuRh2S4 under quasihydrostatic pressure of up to 8.0 GPa, and found a pressure-induced superconductor-insulator transition. Initially, with increasing pressure, the superconducting transition temperature T(c) increases from 4.7 K at ambient pressure to 6.4 K at 4.0 GPa, but decreases at higher pressures. With further compression, superconductivity in CuR...