Infrared and Terahertz Spectroscopy of Strongly Correlated Electron Systems under Extreme Conditions

TL;DR

This paper reviews recent advances in infrared and terahertz synchrotron radiation spectroscopy techniques and their application to studying strongly correlated electron systems under extreme conditions like high pressure and magnetic fields.

Contribution

It provides a comprehensive overview of methodological developments and experimental findings in IR/THz-SR spectroscopy of SCESs under extreme conditions.

Findings

Enhanced understanding of electronic structures of SCESs

Development of advanced IR/THz spectroscopy techniques

Insights into phonon and vibrational modes under extreme environments

Abstract

Owing to its high brilliance, infrared and terahertz synchrotron radiation (IR/THz-SR) has emerged as a powerful tool for spectroscopy under extreme (i.e., technically more difficult) experimental conditions such as high pressure, high magnetic field, high spatial resolution, and a combination of these. The methodologies for pressure- and magnetic-field-dependent spectroscopy and microscopy using IR/THz-SR have advanced rapidly worldwide. By applying them in strongly correlated electron systems (SCESs), many experimental studies have been performed on their electronic structures and phonon/molecular vibration modes under extreme conditions. Here, we review the recent progress of methodologies of IR/THz-SR spectroscopy and microscopy, and the experimental results on SCESs and other systems obtained under extreme conditions.