Spin- and time-resolved photoelectron spectroscopy and diffraction studies using time-of-flight momentum microscopes

Schönhense, G.; Elmers, H. J.

doi:10.1116/6.0001500

Cited by 6 publications

(3 citation statements)

References 234 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, in the reciprocal space image, the position on the detector linearly corresponds to k || and is independent of the kinetic energy (to within chromatic aberrations). Thus, unlike in ARPES using HA, the detector calibration and k || -resolution in MM do not change as a function of E kin and k || [56,57] . powerful and versatile materials characterization technique that images photoelectrons with nanometer-scale spatial resolution.…”

Section: Capabilities and Advantages Of MMmentioning

confidence: 88%

“…Thus, unlike in ARPES using HA, the detector calibration and k || -resolution in MM do not change as a function of E kin and k || . [56,57] Spatial Resolution: As a type of cathode lens microscopy, spatial resolution is inherent to MM. The objective lens not only forms a reciprocal image in the Fourier plane but also a realspace image in the image plane.…”

Section: Capabilities and Advantages Of MMmentioning

confidence: 99%

See 1 more Smart Citation

Through the Lens of a Momentum Microscope: Viewing Light‐Induced Quantum Phenomena in 2D Materials

2022

View full text Add to dashboard Cite

Van der Waals (vdW) materials at their two-dimensional limit are diverse, flexible, and unique laboratories to study fundamental quantum phenomena and their future applications. Their novel properties rely on their pronounced Coulomb interactions, variety of crystal symmetries and spinphysics, and the ease of incorporation of different vdW materials to form sophisticated heterostructures. In particular, the excited state properties of many two-dimensional semiconductors and semi-metals are relevant for their technological applications, particularly those that can be induced by light. In this paper, we review the recent advances made in studying out-of-equilibrium, light-induced, phenomena in these materials using powerful, surface-sensitive, time-resolved photoemission-based techniques, with a particular emphasis on the emerging multi-dimensional photoemission spectroscopy technique of time-resolved momentum microscopy. We discuss the advances this technique has enabled in studying the nature and dynamics of occupied excited states in these materials. Then, we project for the future research directions opened by these scientific and instrumental advancements, studying the physics of two-dimensional materials and the opportunities to engineer their band-structure and band-topology by laser fields.

show abstract

Section: Capabilities and Advantages Of MMmentioning

confidence: 88%

Section: Capabilities and Advantages Of MMmentioning

confidence: 99%

Through the Lens of a Momentum Microscope: Viewing Light‐Induced Quantum Phenomena in 2D Materials

2022

View full text Add to dashboard Cite

show abstract

“…In particular, applying spin filter crystals to electron analyzers will enable direct extraction of the spin-dependent spectral density function of 2D materials in energy–momentum space. 137 The spin-resolved information of the charge carriers will be crucial for understanding the spin polarizations/valley polarizations and corresponding dynamics, which are important for future development of valleytronic devices. Moreover, TR-MM has the potential to access the spectral function of in operando devices with superior real space resolution.…”

Section: Future Outlookmentioning

confidence: 99%

Time- and angle-resolved photoemission spectroscopy (TR-ARPES) of TMDC monolayers and bilayers

Liu

2023

Chem. Sci.

View full text Add to dashboard Cite

show abstract

Efficiency improvement of spin-resolved ARPES experiments using Gaussian process regression

Iwasawa,

Ueno,

Iwata

et al. 2024

Sci Rep

View full text Add to dashboard Cite

The experimental efficiency has been a central concern for time-consuming experiments. Spin- and angle-resolved photoemission spectroscopy (spin-resolved ARPES) is renowned for its inefficiency in spin-detection, despite its outstanding capability to directly determine the spin-polarized electronic properties of materials. Here, we investigate the potential enhancement of the efficiency of spin-resolved ARPES experiments through the integration of measurement informatics. We focus on a representative topological insulator $$\text {Bi}_{2}$$ Bi 2 $$\text {Te}_{3}$$ Te 3 , which has well-understood spin-polarized electronic states. We employ Gaussian process regression (GPR) to assess the accumulation of spin polarization information using an indicator known as the GPR score. Our analyses based on the GPR model suggest that the GPR score can serve as a stopping criterion for spin-resolved ARPES experiments. This criterion enables us to conduct efficient spin-resolved ARPES experiments, significantly reducing the time costs by 5-10 times, compared to empirical stopping criteria.

show abstract

Spin- and time-resolved photoelectron spectroscopy and diffraction studies using time-of-flight momentum microscopes

Abstract: Note: This paper is a part of the Special Collection Commemorating the Career of Charles S. Fadley.

Cited by 6 publications

References 234 publications

Through the Lens of a Momentum Microscope: Viewing Light‐Induced Quantum Phenomena in 2D Materials

Through the Lens of a Momentum Microscope: Viewing Light‐Induced Quantum Phenomena in 2D Materials

Time- and angle-resolved photoemission spectroscopy (TR-ARPES) of TMDC monolayers and bilayers

Efficiency improvement of spin-resolved ARPES experiments using Gaussian process regression

Contact Info

Product

Resources

About