A5044254153- Nanowire Synthesis and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Chemical Physics Studies
- Semiconductor materials and devices
- Topological Materials and Phenomena
- Atomic and Molecular Physics
- Surface and Thin Film Phenomena
- Electronic and Structural Properties of Oxides
- Advancements in Semiconductor Devices and Circuit Design
- Quantum and electron transport phenomena
University of Regensburg
2021-2022
We explored the bonding properties of quantum corral (a circle 48 iron atoms placed on a copper surface) reported by Crommie et al. in 1993, along with variants, as an artificial atom using atomic force microscope (AFM). The original geometry confines 102 electrons to 28 discrete energy states, and we found that these states can form bond front AFM about 5 millielectron volts. measured forces are 1/1000 typical atomically resolved AFM. confined showed covalent attraction metal tips Pauli...
We report GaAs/AlGaAs nanowires in the one-dimensional (1D) quantum limit. The ultrathin wurtzite GaAs cores between 20-40\,nm induce large confinement energies of several tens meV, allowing us to experimentally resolve up four well separated subband excitations microphotoluminescence spectroscopy. Our detailed experimental and theoretical polarization-resolved study reveals a strong diameter-dependent anisotropy these transitions: demonstrate that polarization detected photoluminescence is...
We report GaAs/AlGaAs nanowires in the one-dimensional (1D) quantum limit. The ultrathin wurtzite GaAs cores between 20-40\,nm induce large confinement energies of several tens meV, allowing us to experimentally resolve up four well separated subband excitations microphotoluminescence spectroscopy. Our detailed experimental and theoretical polarization-resolved study reveals a strong diameter-dependent anisotropy these transitions: demonstrate that polarization detected photoluminescence is...