Fermi Surface and Quantum Critical Phenomena of High-Temperature Superconductors
Softcover reprint of the original 1st ed. 2017
Book Details
Format
Paperback / Softback
Book Series
Springer Theses
ISBN-10
3319839845
ISBN-13
9783319839844
Edition
Softcover reprint of the original 1st ed. 2017
Publisher
Springer International Publishing AG
Imprint
Springer International Publishing AG
Country of Manufacture
GB
Country of Publication
GB
Publication Date
Jun 29th, 2018
Print length
162 Pages
Product Classification:
Condensed matter physics (liquid state & solid state physics)Condensed matter physics (liquid state and solid state physics)Quantum physics (quantum mechanics & quantum field theory)Quantum physics (quantum mechanics and quantum field theory)Mechanical engineeringMaterials scienceOther technologies & applied sciencesOther technologies and applied sciences
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While the lower superconducting critical field shows evidence of quantum criticality, the upper superconducting critical field is not influenced by the quantum critical point.
This thesis provides a detailed introduction to quantum oscillation measurement and analysis and offers a connection between Fermi surface properties and superconductivity in high-temperature superconductors. It also discusses the field of iron-based superconductors and tests the models for the appearance of nodes in the superconducting gap of a 111-type pnictide using quantum oscillation measurements combined with band structure calculation.
The same measurements were carried out to determine the quasiparticle mass in BaFe2(As1-xPx)2, which is strongly enhanced at the expected quantum critical point. While the lower superconducting critical field shows evidence of quantum criticality, the upper superconducting critical field is not influenced by the quantum critical point. These findings contradict conventional theories, demonstrating the need for a theoretical treatment of quantum critical superconductors, which has not been addressed to date.
The quest to discover similar evidence in the cuprates calls for the application of extreme conditions. As such, quantum oscillation measurements were performed under high pressure in a high magnetic field, revealing a negative correlation between quasiparticle mass and superconducting critical temperature.
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