Implementing microwave impedance microscopy in a dilution refrigerator.
Zhanzhi JiangSu Kong ChongPeng ZhangPeng DengShizai ChuShahin JahanbaniKang L WangKeji LaiPublished in: The Review of scientific instruments (2023)
We report the implementation of a dilution refrigerator-based scanning microwave impedance microscope with a base temperature of ∼100 mK. The vibration noise of our apparatus with tuning-fork feedback control is as low as 1 nm. Using this setup, we have demonstrated the imaging of quantum anomalous Hall states in magnetically (Cr and V) doped (Bi, Sb)2Te3 thin films grown on mica substrates. Both the conductive edge modes and topological phase transitions near the coercive fields of Cr- and V-doped layers are visualized in the field-dependent results. Our study establishes the experimental platform for investigating nanoscale quantum phenomena at ultralow temperatures.
Keyphrases
- high resolution
- quantum dots
- molecular dynamics
- high throughput
- liquid chromatography tandem mass spectrometry
- quality improvement
- primary care
- healthcare
- highly efficient
- radiofrequency ablation
- energy transfer
- liquid chromatography
- air pollution
- dual energy
- high speed
- photodynamic therapy
- metal organic framework
- single molecule
- computed tomography
- gas chromatography
- mass spectrometry
- atomic force microscopy
- high frequency
- magnetic resonance imaging
- tandem mass spectrometry
- tissue engineering
- simultaneous determination
- reduced graphene oxide