Experimental study of transport properties across the phase diagram of high-Tc superconductors

My PhD thesis is situated within this context and aims to deepen the understanding of the complex phase diagram of unconventional HTS superconductors by means of the study of their transport properties. On one hand, my work involves the cuprate superconductor La2−xSrxCuO4 (LSCO), for which a comprehensive set of transport properties measurements has been conducted to investigate the so-called strange metal phase, which is generally considered as the most interesting region besides the superconducting phase of cuprates. On the other hand, I have contributed to the study the phase diagram of the iron-based superconductor Ba1−xKxFe2As2 (BKFA), where a region with spontaneous breaking of time-reversal symmetry (BTRS) is observed. In particular, my research has highlighted the transport properties and the emergence of spontaneous transverse voltage effects as indicators of BTRS. This work led me to a broader investigation of the appearance of spontaneous transverse effects across various superconducting materials: through both experimental measurements and finite element simulations, I have correlated these spontaneous effects, usually referred as Spontaneous Hall/Nernst effect, with the inhomogeneous structure of the material.