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HL: Fachverband Halbleiterphysik

HL 55: Quantum dots and wires: Preparation and characterization

HL 55.11: Vortrag

Freitag, 16. März 2018, 12:15–12:30, A 151

Macro-mechanics Controls Quantum Mechanics: Mechanically Controllable Quantum Conductance Switching of an Electrochemically Fabricated Atomic-scale Transistor — •Torben Staiger^1,2, Florian Wertz¹, Fangqing Xie¹, Marcel Heinze¹, Philipp Schmieder¹, Christian Lutzweiler¹, and Thomas Schimmel^1,2 — ¹Institute of Applied Physics, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany — ²Institute of Nanotechnology, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany

We present a silver atomic-scale device fabricated and operated by a combined technique of electrochemical control (EC) and mechanically controllable break junction (MCBJ). With this EC-MCBJ technique, we can perform mechanically controllable bistable quantum conductance switching of a silver quantum point contact (QPC) in an electrochemical environment at room temperature. In this way, the silver QPC of the atomic quantum transistor can be controlled both mechanically and electrochemically, and the operating modes can be changed from electrochemical to mechanical, which expands the possibilities for controlling QPCs.