Presentation Information
[1P17]Growth, morphology, and electronic properties of (Bi, Pb) atom layer systems, studied by low-temperature STM and STS
*Lars Konermann1, Wen Si2, Masahiro Haze2, Yukio Hasegawa2, Akari Takayama1,3 (1. Department of Physics and Applied Physics, Waseda University, 2. Institute for Solid State Physics, University of Tokyo, 3. Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University)
Atomic-layer alloy structures on semiconductor substrates formed with elements that exhibit strong spin-orbit coupling are intriguing structures due to exotic phenomena, like the combination of spin-splitting caused by the Rashba-effect and superconductivity. In this study, we investigated the growth, atomic configuration, and potential for superconductivity of (Bi, Pb) atom-layer alloy structures on semiconductor substrates using electron diffraction, as well as ultralow temperature scanning tunneling microscopy and spectroscopy. We successfully fabricated structures with 2×2 periodicity on both Si(111) and Ge(111). Furthermore, in order to gain insight into transport properties of the 2×2 structure from the perspective of electronic states, we measured the electronic states near the Fermi level.