Fourier Transform Inelastic Electron Tunneling Spectroscopy: A new tool for exploration of electron-boson interactions in High-Tc superconductors

Since the early works, Inelastic Electron Tunneling Spectroscopy(IETS) has been the most sensitive tool to probe collective modes in the solid state. McMillan/Rowell utilized this technique to elucidate the phonon structures in the conventional superconductors, and Stipe et al. succeeded in IETS using low temperature STM(LT-STM). So far none of these works had momentum space resolution. Recently, McElroy et al. introduced the Fourier Transform Scanning Tunneling Spectroscopy(FT-STS) technique to get k-space information about quasi-particles in the high-Tc Superconductors using LT-STM. Here we report developement of the FT-IETS technique, on the basis of the previous works above, for the study of the high-Tc. This technique has the potential to be a powerful tool for probing local characteristic, as well as the momentum space information of the bosonic modes in the high-Tc superconductors. We will also present some preliminary results from this technique on Bi-2212.