The Investigation of Scanning Tunneling Microscopy and Spectroscopy on High-Tc Superconductors

Download or read book The Investigation of Scanning Tunneling Microscopy and Spectroscopy on High-Tc Superconductors written by Yi Yin and published by . This book was released on 2009 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Other work contributing to this thesis is focused on a cuprate superconductor, Bi 2- y Pb y Si 2 CuO 6+ [delta] . With the density of states (DOS) maps at both zero and nonzero magnetic fields, a division normalization method is applied to separate two characteristic energy scales. We extract a homogeneous hidden small gap coexisting with an apparent inhomogeneous gap. Compared with a recent experiment performed by Boyer et al. , the hidden small gap is believed to be a superconducting order and the apparent inhomogeneous gap is referred to the pseudogap phase. Under the magnetic field range in our experiment, a vortex liquid state is proposed. This technique can be extended to detect the possible superconducting information in the Nernst state above Tc .