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Angle-resolved photoelectron spectroscopy (ARPES) is a key technique for understanding quantum materials. This review highlights how ARPES reveals electronic band structure and properties in novel materials.

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Area of Science:

  • Solid State Physics
  • Materials Science
  • Quantum Materials

Background:

  • X-ray based electron spectroscopies have long been used to study material properties.
  • Angle-resolved photoelectron spectroscopy (ARPES) directly measures electronic band structure.
  • ARPES is crucial for understanding spin, charge, and orbital degrees of freedom.

Purpose of the Study:

  • To introduce angle-resolved photoelectron spectroscopy (ARPES).
  • To showcase ARPES applications in quantum materials research.
  • To demonstrate how ARPES reveals hidden spectral features.

Main Methods:

  • Measurement of kinetic energy and angle of emitted photoelectrons.
  • Application of ARPES to topological insulators, transition metal dichalcogenides, and oxides.
  • Combination of angle, spin, time, and depth-resolved experimental techniques.

Main Results:

  • Direct measurement of electronic band structure in crystalline solids.
  • Insights into electronic interactions and control of fundamental degrees of freedom.
  • Revelation of semiconducting, metallic, and magnetic properties.

Conclusions:

  • ARPES is a core technique for studying lower-dimensional and quantum materials.
  • Dimensional effects significantly impact quantum material properties.
  • Advanced ARPES experiments uncover complex material behaviors.