SET-based experiments for HTSC materials

Cuprates seem to exhibit statistics, dimensionality and phase transitions in novel ways. The nature of excitations (i.e. quasiparticle or collective), spin-charge separation, stripes (static and dynamics), inhomogeneities, pseudogap, effect of impurity dopings (e.g. Zn, Ni) and any other phenomenon in these materials must be consistently understood. In this paper we further discuss our original suggestion of using single electron tunnelling transistor (SET)-based experiments to understand the role of charge dynamics in these systems. Assuming that SET operates as an efficient charge detection system, we can expect to understand the underlying physics of charge transport and charge fluctuations in these materials for a range of doping. Experiments such as these can be classified in a general sense as mesoscopic and nano characterization of cuprates and related materials. In principle such experiments can show whether an electron is fractionalized in cuprates as indicated by angle-resolved photoemission spectroscopy data. In contrast to flux trapping experiments, SET-based experiments are more direct in providing evidence about spin-charge separation. In addition a detailed picture of nano charge dynamics in cuprates may be obtained.