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MI: Fachverband Mikrosonden
MI 5: Scanning Probe Microscopy
MI 5.2: Talk
Wednesday, March 9, 2016, 16:15–16:30, H5
Liquid helium free scanning probe microscope working at below 10 K — •Byoung Choi — RHK Technology, Troy Michigan, USA
We developed a closed cycle cryostat base low temperature scanning probe microscope (LT-SPM) that works below 10 K without consuming any liquid cryogen. The basic performance of the microscope was validated in various conditions such as noisy environment and modulated temperature in a sub-atomic scale. The state-of-the-art technique allows the extended time elapsed measurements such as week-long investigation of surface dynamics at low temperature without interrupting the critical moment of the tip while refilling the conventional cryogen tanks. The compact, rigid design of the microscope also allows the study in a variable temperature without the hassle of liquid cryogen consumption. We will presents the time evolution of the surface states at various temperatures between 10 K and 350 K on the 2D electron substrates such as Bi2Se3, Bi2Te3 and TiSe2. In the end, we will discuss how the cryogen free LT-SPM can open the new capabilities to surface scientists and researchers in nanotechnology in terms of the economical and practical reason.