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Related Experiment Video

Updated: Aug 9, 2025

Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures

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Published on: October 9, 2012

Compositionally Complex Alloys: Some Insights from Photoemission Spectroscopy.

Petar Pervan¹, Vesna Mikšić Trontl¹, Ignacio Alejandro Figueroa²

¹Institute of Physics, 10000 Zagreb, Croatia.

Materials (Basel, Switzerland)

|February 25, 2023

Summary

Photoemission spectroscopy (PES) reveals crucial electronic structure details in compositionally complex alloys (CCA). This technique explains material properties by analyzing valence band structures and constituent contributions.

Keywords:

UPS XPS amorphous alloys compositionally complex alloys electronic density of states—DOS electronic structure high-entropy alloys metallic glasses photoemission spectroscopy

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Area of Science:

Materials Science
Condensed Matter Physics
Surface Science

Background:

Compositionally complex alloys (CCA), including high-entropy alloys (HEA), are a significant class of advanced materials.
Understanding the electronic structure of CCAs is vital for predicting and controlling their intrinsic properties.
Photoemission spectroscopy (PES) is an underutilized technique for investigating CCA electronic structures.

Purpose of the Study:

To highlight the importance and application of PES in studying CCAs.
To demonstrate how PES can elucidate the electronic structure and properties of CCAs.
To present specific examples of PES applications in alloy research.

Main Methods:

Photoemission spectroscopy (PES) was employed to probe the electronic structure of various CCAs.
Techniques included analyzing valence band (VB) structures, density of states (DOS) at the Fermi level, and constituent contributions.
Specific alloy systems studied include transition metal alloys and Cantor-type alloys.

Main Results:

PES revealed differences between split-band and common-band structures in the valence band, explaining alloy properties.
High-accuracy PES determined the variation in the density of states at the Fermi level with Cu content in Ti-Zr-Nb-Ni-Cu metallic glasses.
Initial results demonstrated the ability to isolate the electronic contributions of individual elements in Cantor-type alloys.

Conclusions:

PES is essential for a comprehensive understanding of CCA electronic structure and properties.
The analysis of VB structures and constituent contributions using PES provides valuable insights into alloy behavior.
PES offers a powerful approach for materials design and discovery in the field of advanced alloys.