Infrared nanoscopy down to liquid helium temperatures

作者: Denny Lang , Jonathan Döring , Tobias Nörenberg , Ádám Butykai , István Kézsmárki

DOI: 10.1063/1.5016281

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摘要: We introduce a scattering-type scanning near-field infrared microscope (s-SNIM) for the local scale sample analysis and spectroscopy from room temperature down to liquid helium (LHe) temperature. The extension of s-SNIM T = 5 K is in particular crucial low-temperature phase transitions, e.g., examination superconductors, as well low energy excitations. (LT) performance tested with CO2-IR excitation at 7 using bare Au reference structured Si/SiO2-sample. Furthermore, we quantify impact laser heating under tip apex by monitoring light-induced ferroelectric-to-paraelectric transition skyrmion-hosting multiferroic material GaV4S8 Tc 42 K. apply LT study spectral response its lateral domain structure ferroelectric mid-IR THz free-electron laser-light source FELBE Helmholtz-Zentrum Dresden-Rossendorf, Germany. Notably, our s-S...

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