The nature of the magnetic-field driven superconductor-to-insulator quantum-phase transition in two-dimensional systems at zero temperature has been under debate since 1980s, and became even more controversial after observation a quantum-Griffiths singularity. Whether it is induced by quantum fluctuations superconducting phase localization Cooper pairs, or directly depairing these remains an op...

Theories of the origin superconductivity in cuprates depend on an understanding their normal state, which exhibits various competing orders. Transport and thermodynamic measurements La2 − xSrxCuO4 show signatures a quantum critical point associated fluctuations, including peak electronic specific heat versus doping, near doping p* where pseudogap collapses. The fundamental nature these fluctuat...

Chain-like structured superconductive materials (such as A_2Cr_3As_3, with A = K, Rb, Cs) exhibit the multiband electronic structure of single-particle states, where coexisting quasi-one-dimensional (Q1D) and conventional higher-dimensional energy bands take part in creation aggregate superconducting condensate. When chemical potential approaches edge a Q1D band single-band superconductor, corr...

Accurate determination of the full momentum-dependent spin susceptibility $\chi(\mathbf{q}) $ is very important for description magnetism and superconductivity. While in principle formalism calculating $\chi(\mathbf{q})$ linear response density functional theory (DFT) well established, hardly any publicly available code includes this capability. Here, we describe an alternative way to calculate...