A5028275639- Force Microscopy Techniques and Applications
- 2D Materials and Applications
- Analytical Chemistry and Sensors
- Diamond and Carbon-based Materials Research
- Semiconductor Quantum Structures and Devices
- Multiferroics and related materials
- Quantum and electron transport phenomena
- Mechanical and Optical Resonators
- Advanced Electron Microscopy Techniques and Applications
- Graphene research and applications
- Physics of Superconductivity and Magnetism
- Magnetic Field Sensors Techniques
- Perovskite Materials and Applications
- Surface and Thin Film Phenomena
University of Basel
2020-2024
We report the development of a scanning force microscope based on an ultra-sensitive silicon nitride membrane transducer. Our is made possible by inverting standard geometry - in our instrument, substrate vibrating and tip at rest. present first topography images samples placed surface. measurements demonstrate that retains excellent sensitivity when loaded with presence tip. discuss prospects limitations instrument as quantum-limited sensor imaging tool.
Intrinsic 2D magnets have recently been established as a playground for studies on fundamentals of magnetism, quantum phases, and spintronic applications. The inherent instability at low dimensionality often results in coexistence and/or competition different magnetic orders. Such ordering may manifest itself phase-separated states. In 4f materials, phase separation is expressed various experiments; however, the experimental evidence circumstantial. Here, we employ high-sensitivity MFM...
We demonstrate the use of individual magnetic nanowires (NWs), grown by focused-electron-beam-induced deposition (FEBID), as scanning force sensors. Measurements their mechanical susceptibility, thermal motion, and response show that these NWs possess high-quality flexural modes a strong remanent magnetization pointing along long axis. Together, properties make excellent sensors weak field patterns, confirmed calibration measurements on micron-sized current-carrying wire scanning-probe...
Mobile electrons in the semiconductor monolayer MoS_{2} form a ferromagnetic state at low temperature. The Fermi sea consists of two circles: one K point, other K[over ˜] both with same spin. Here, we present an optical experiment on gated electron density which excitons are injected known spin and valley quantum numbers. resulting trions identified using model accounts for injection process, formation antisymmetrized trion states, electron-hole scattering from to other, recombination....
Mobile electrons in the semiconductor monolayer-MoS$_2$ form a ferromagnetic state at low temperature. The Fermi sea consists of two circles, one $K$-point, other $\tilde{K}$-point, both with same spin. Here, we present an optical experiment on gated MoS$_2$ electron-density which excitons are injected known spin and valley quantum numbers. resulting trions identified using model accounts for injection process, formation antisymmetrized trion states, electron-hole scattering from to other,...