Fast spectroscopic mapping of two-dimensional quantum materials

@article{Zengin2021FastSM,
  title={Fast spectroscopic mapping of two-dimensional quantum materials},
  author={Berk Zengin and Jens Oppliger and Danyang Liu and Lorena Niggli and T. Kurosawa and Fabian D Natterer},
  journal={Physical Review Research},
  year={2021}
}
Spectroscopic mapping refers to the massive recording of spectra whilst varying an additional degree of freedom, such as: magnetic field, location, temperature, or charge carrier concentration. As this involves two serial tasks, spectroscopic mapping can become excruciatingly slow. We demonstrate exponentially faster mapping through our combination of sparse sampling and parallel spectroscopy. We exemplify our concept using quasiparticle interference imaging of Au(111) and Bi2Sr2CaCu2O8… 

Figures from this paper

References

SHOWING 1-10 OF 38 REFERENCES
Sparse sampling for fast quasiparticle-interference mapping
Scanning tunneling microscopy (STM) is a notoriously slow technique; Data-recording is serial which renders complex measurement tasks, such as quasiparticle interference (QPI) mapping, impractical.
The 2021 quantum materials roadmap
In recent years, the notion of ‘Quantum Materials’ has emerged as a powerful unifying concept across diverse fields of science and engineering, from condensed-matter and coldatom physics to materials
Imaging Quasiparticle Interference in Bi2Sr2CaCu2O8+δ
Scanning tunneling spectroscopy of the high-T c superconductor Bi2Sr2CaCu2O8+δreveals weak, incommensurate, spatial modulations in the tunneling conductance. Images of these energy-dependent
Relating atomic-scale electronic phenomena to wave-like quasiparticle states in superconducting Bi2Sr2CaCu2O8+δ
TLDR
F Fourier transform studies of atomic-scale spatial modulations in the Bi-2212 density of states show strong similarities to the structure of the occupied states, and the copper oxide quasiparticles apparently exhibit particle–hole mixing similar to that of conventional superconductors.
Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2
TLDR
By investigating three distinct surface terminations of the ferromagnetic semimetal Co3Sn2S2, it is verified spectroscopically that the distinct surface potentials imposed by three different terminations modify the Fermi-arc contour and Weyl node connectivity.
Atomic-scale quasi-particle scattering resonances in Bi2Sr2CaCu2O8+delta
TLDR
Low-temperature scanning tunneling spectroscopy of the high transition temperature (high-Tc) cuprate Bi2Sr2CaCu2O8+delta reveals the existence of large numbers of identical regions with diameters of about 3 nanometers that have a relatively high density of low-energy quasi-particle states, consistent with theories of strong quasi- particle scattering from atomic-scale impurities in a d-wave superconductor.
Machine learning in electronic-quantum-matter imaging experiments
TLDR
These ANNs are used to analyse an archive of experimentally derived EQM image arrays from carrier-doped copper oxide Mott insulators, discovering the existence of a lattice-commensurate, four-unit-cell periodic, translational-symmetry-breaking EQM state and determining that this state is unidirectional.
Vibrationally Resolved Fluorescence Excited with Submolecular Precision
TLDR
These experiments realize the feasibility of fluorescence spectroscopy with the STM and enable the integration of optical spectroscope with a nanoprobe for the investigation of single molecules.
Compressed Sensing in Scanning Tunneling Microscopy/Spectroscopy for Observation of Quasi-Particle Interference
We applied a method of compressed sensing to the observation of quasi-particle interference (QPI) by scanning tunneling microscopy/spectroscopy to improve efficiency and save measurement time. To
Electron paramagnetic resonance of individual atoms on a surface
TLDR
This work used a spin-polarized scanning tunneling microscope tip to measure EPR spectra of single iron atoms adsorbed on a magnesium oxide surface at cryogenic temperatures, and drove the spin resonance with an oscillating electric field between tip and sample.
...
1
2
3
4
...