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O: Fachverband Oberflächenphysik

O 34: Poster: Surface Dynamics & Electron-Driven Processes

O 34.2: Poster

Tuesday, March 19, 2024, 18:00–20:00, Poster C

Exploring the Commensurate Charge Density Wave in Tantalum Disulfide: Insights from Scanning Tunneling Microscopy and Spectroscopy — •Georg A. Traeger1, Jan-Niclas Schmidt1, Kai Rossnagel3,4, Murat Sivis1,2, Claus Ropers1,2, and Martin Wenderoth11University of Göttingen, IV. Physik, Fredrich-Hund-Platz 1, 37077 Göttingen, Germany — 2Department of Ultrafast Dynamics, Max Planck Institute for Multidisciplinary Sciences, 37077 Göttingen, Germany — 3Institute for Experimental and Applied Physics, University of Kiel, 24098 Kiel, Germany — 4Ruprecht Haensel Laboratory, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany

In recent years, transition-metal dichalcogenides have attracted great interest, owing to a wide range of correlated and tunable physical phenomena. 1T-tantalum disulfide is a widely-studied model system, which exhibits a series of charge-density wave states and a strong influence of stacking on its electronic properties. Here, we present a study of the low-temperature commensurate charge density wave and its metastable states by means of Scanning Tunneling Microscopy (STM) and Spectroscopy (STS). We investigate the defect- and laser-induced creation and manipulation of metastable states, emphasizing the roles of translational phase boundaries and heterochirality.

Keywords: Scanning Tunneling Microscopy; Charge Density Wave; TaS2; Phase Transition; STM

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