About this book
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.
Quantum Critical Superconductors Quantum Criticality Quantum Oscillation de Haas-van Alphen Shubnikov-de Haas High Temperature Superconductor Fermi Surface Measurements Cuprate Superconductors Iron-based Superconductors Abrikosov Vortex Core States Quasi-particle Mass Fermi Surface Evolution Under Hydrostatic Pressure High Magnetic Fields
- DOI https://doi.org/10.1007/978-3-319-48646-8
- Copyright Information Springer International Publishing AG 2017
- Publisher Name Springer, Cham
- eBook Packages Physics and Astronomy
- Print ISBN 978-3-319-48645-1
- Online ISBN 978-3-319-48646-8
- Series Print ISSN 2190-5053
- Series Online ISSN 2190-5061
- Buy this book on publisher's site