https://doi.org/10.1140/epjs/s11734-021-00216-8
Review
Review of recent progress on THz spectroscopy of quantum materials: superconductors, magnetic and topological materials
1
School of Physical Sciences, Indian Association for the Cultivation of Science, 700032, Kolkata, India
2
Department of Physics, Acharya Prafulla Chandra College, New Barrackpore, 700131, Kolkata, India
Received:
22
March
2021
Accepted:
5
July
2021
Published online:
15
July
2021
Recently, the THz spectroscopy has been efficiently used to investigate varieties of quantum materials, including superconductors, novel magnetic, and topological materials. These materials often exhibit strong correlation and competing interactions between various degrees of freedom, including charge, spins, orbital, and lattice dynamics, which lead to many exotic phenomena and novel phase transitions whose cause–effect correlations are challenging to determine. Whereas probing the ground state’s excitations can unravel the underlying mechanism of these complex phenomena. The characteristic energy scales of different elementary excitations and collective modes in many of these materials are in the THz frequency range. Therefore, THz spectroscopy has become a very effective probe and directly revealed many exciting physics. Many novel phenomena, including exotic quasiparticle excitations in magnetic systems, topological magneto-electric effect, and topological quantum phase transition in three-dimensional topological insulators, are studied with unprecedented success. Here, we review some recent research reports on many-body quantum materials, including superconductors, novel magnetic, and topological materials probed by few popular THz-spectroscopy techniques. We will also briefly discuss the prospects of using THz spectroscopy for observing some exotic quantum phenomena that are still elusive or under investigation.
The original online version of this article was revised: In Figure 1, the temperature scale was wrong by 3 orders of magnitude (i.e. 1000). The scale label should have been “Temperature (mK)” instead of “Temperature (K)”. Figure 1 has been replaced accordingly.
A correction to this article is available online at https://doi.org/10.1140/epjs/s11734-023-01078-y.
Copyright comment corrected publication 2023
Copyright comment corrected publication 2024
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© The Author(s), under exclusive licence to EDP Sciences, Springer-Verlag GmbH Germany, part of Springer Nature 2021. corrected publication 2023. corrected publication 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
