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Spectroscopic Studies of Quasiparticle Low-Energy Excitations in Cuprate and Iron-Based High-Temperature Superconductors

Yeh, Nai-Chang (2019) Spectroscopic Studies of Quasiparticle Low-Energy Excitations in Cuprate and Iron-Based High-Temperature Superconductors. In: Endless Quests: Theory, Experiments And Applications Of Frontiers Of Superconductivity. Peking University-World Scientific Advanced Physics Series. No.7. World Scientific Publishing , Singapore, pp. 83-154. ISBN 978-981-3270-78-7. https://resolver.caltech.edu/CaltechAUTHORS:20140618-134947987

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Abstract

Recent development in the physics of high-temperature superconductivity (SC) is reviewed, with special emphasis on the studies of the low-energy excitations of cuprate and iron-based superconductors. For cuprate superconductors, a phenomenology based on coexisting competing orders with superconductivity in the ground state of these doped Mott insulators is shown to provide a consistent account for a wide range of experimental findings. In the case of iron-based superconductors, studies of the low-energy excitations reveal interesting similarities and differences when compared with cuprate superconductors. In contrast to the single-band cuprate superconductivity with an insulating parent state, the ferrous superconductors are multi-band materials with a semi-metallic parent state and exhibit two-gap superconductivity when doped. On the other hand, both systems exhibit strong antiferromagnetic correlation and Fermi-surface distortion, leading to unconventional pairing symmetries with sign-changing order parameters on different parts of the Fermi surface. These findings suggest that the pairing potentials in both the cuprate and the ferrous superconductors are generally repulsive, thus favoring a pairing mechanism that is electronically driven and a pairing strength that is closely related to the electronic correlation. The physical implications of the unified phenomenology based on antiferromagnetic correlations and remaining open issues associated with the cuprate and ferrous superconductivity are discussed.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1142/9789813270794_0002DOIArticle
ORCID:
AuthorORCID
Yeh, Nai-Chang0000-0002-1826-419X
Additional Information:© 2019 World Scientific Publishing Co. Pte. Ltd. Much of the research results presented here are in collaboration with Marcus L. Teague, Dr. Andrew D. Beyer, Dr. C.-T. Chen, M. S. Grinolds, Professor Setsuko Tajima, Professor Hai-Hu Wen and Professor Jochen Mannhart. The author also acknowledges research support from the National Science Foundation and the Kavli Foundation through the facilities at the Kavli Nanoscience Institute at Caltech.
Group:Kavli Nanoscience Institute
Funders:
Funding AgencyGrant Number
NSFUNSPECIFIED
Kavli Nanoscience InstituteUNSPECIFIED
Kavli FoundationUNSPECIFIED
Series Name:Peking University-World Scientific Advanced Physics Series
Issue or Number:7
Record Number:CaltechAUTHORS:20140618-134947987
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140618-134947987
Official Citation:Spectroscopic Studies of Quasiparticle Low-Energy Excitations in Cuprate and Iron-Based High-Temperature Superconductors. Nai-Chang Yeh. Endless Quests. January 2019, 83-154; doi: 10.1142/9789813270794_0002
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46340
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:18 Jun 2014 21:07
Last Modified:08 Jan 2020 17:46

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