Phase diagram of ad-wave superconductor with Anderson impurities

Zero temperature phase diagram of a d-wave superconductor with Anderson impurities

Magnetic and nonmagnetic impurities in correlated electron systems are an important probe of the properties of the host material. There is large and growing body of research on impurities in high-temperature superconductors.[1, 2] The refinement of experimental techniques probing local properties stimulated the theoretical work on defects in those systems. The investigation of the effects of Zn...

Phase diagram of the Anderson transition with atomic matter waves

We realize experimentally a cold atom system equivalent to the 3D Anderson model of disordered solids where the anisotropy can be controlled by adjusting an experimentally accessible parameter. This allows us to study experimentally the disorder vs anisotropy phase diagram of the Anderson metalinsulator transition. Numerical and experimental data compare very well with each other and a theoreti...

Impurities and Conductivity in a D-wave Superconductor

Impurity scattering in the unitary limit produces low energy quasiparticles with anisotropic spectrum in a two-dimensional d-wave superconductor. We describe a new quasi-one-dimensional limit of the quasiparticle scattering, which might occur in a superconductor with short coherence length and with finite impurity potential range. The dc conductivity in a d-wave superconductor is predicted to b...

Phase diagram of the two-dimensional Anderson-Hubbard model.

We study the ground state of the two-dimensional Anderson-Hubbard model using a quantum real space renormalization group method. We obtain the phase diagram near half filling. The system is always insulating with disorder. At half filling, the system undergoes a transition from a gapless (Anderson) insulator to an incompressible (Mott-Hubbard) insulator as the interaction U reaches a critical v...

Phase diagram of the one-dimensional periodic Anderson model