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|a 9784431542940
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|a 10.1007/978-4-431-54294-0
|2 doi
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|a 620.112973
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|a Hashimoto, Kenichiro.
|e author.
|4 aut
|4 http://id.loc.gov/vocabulary/relators/aut
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|a Non-Universal Superconducting Gap Structure in Iron-Pnictides Revealed by Magnetic Penetration Depth Measurements
|h [electronic resource] /
|c by Kenichiro Hashimoto.
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|a 1st ed. 2013.
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|a Tokyo :
|b Springer Japan :
|b Imprint: Springer,
|c 2013.
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|a XIII, 125 p. 74 illus., 45 illus. in color.
|b online resource.
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|a text
|b txt
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|a computer
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|a online resource
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|a text file
|b PDF
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|a Springer Theses, Recognizing Outstanding Ph.D. Research,
|x 2190-5061
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|a Introduction -- Superconducting Gap Structure and Magnetic Penetration Depth -- Iron-based Superconductors -- Experimental Method -- Superconducting Gap Structure and Quantum Critical Point in BaFe2(As1-xPx)2 -- Superconducting Gap Nodes in the Zone-centered Hole Bands of KFe2As2 -- Nodeless vs. Nodal Order Parameter in LiFeAs and LiFeP -- Conclusions.
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|a In this book the author presents two important findings revealed by high-precision magnetic penetration depth measurements in iron-based superconductors which exhibit high-transition temperature superconductivity up to 55 K: one is the fact that the superconducting gap structure in iron-based superconductors depends on a detailed electronic structure of individual materials, and the other is the first strong evidence for the presence of a quantum critical point (QCP) beneath the superconducting dome of iron-based superconductors. The magnetic penetration depth is a powerful probe to elucidate the superconducting gap structure which is intimately related to the pairing mechanism of superconductivity. The author discusses the possible gap structure of individual iron-based superconductors by comparing the gap structure obtained from the penetration depth measurements with theoretical predictions, indicating that the non-universal superconducting gap structure in iron-pnictides can be interpreted in the framework of A1g symmetry. This result imposes a strong constraint on the pairing mechanism of iron-based superconductors. The author also shows clear evidence for the quantum criticality inside the superconducting dome from the absolute zero-temperature penetration depth measurements as a function of chemical composition. A sharp peak of the penetration depth at a certain composition demonstrates pronounced quantum fluctuations associated with the QCP, which separates two distinct superconducting phases. This gives the first convincing signature of a second-order quantum phase transition deep inside the superconducting dome, which may address a key question on the general phase diagram of unconventional superconductivity in the vicinity of a QCP.
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|a Superconductivity.
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|a Superconductors.
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|a Quantum physics.
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|a Magnetism.
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|a Superconductivity.
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|a Quantum Physics.
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|a Magnetism.
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|a SpringerLink (Online service)
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|t Springer Nature eBook
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|i Printed edition:
|z 9784431542957
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|i Printed edition:
|z 9784431542933
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|i Printed edition:
|z 9784431563341
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|a Springer Theses, Recognizing Outstanding Ph.D. Research,
|x 2190-5061
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|u https://doi.uam.elogim.com/10.1007/978-4-431-54294-0
|z Texto Completo
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|a ZDB-2-PHA
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|a ZDB-2-SXP
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|a Physics and Astronomy (SpringerNature-11651)
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|a Physics and Astronomy (R0) (SpringerNature-43715)
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