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Determination Of Energy Gap Of The Iron-Based Oxypnictide And Laofege Superconductors Using Specific Heat Capacity

The most prominent indicators of superconductivity are the superconducting transition temperature (Tc) and the superconducting energy gap (Δ). These indicators associated with electronic state of temperature dependence of resistivity and specific heat measurements, respectively. The specific heat is...

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Main Author: Ahmad, Tarek Mohamed Fayez
Format: Thesis
Language:English
Published: 2013
Subjects:
QC1 Physics (General)
Online Access:http://eprints.usm.my/43999/1/Tarek%20Mohamed%20Fayez%20Ahmad24.pdf
http://eprints.usm.my/43999/
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spelling my.usm.eprints.43999 http://eprints.usm.my/43999/ Determination Of Energy Gap Of The Iron-Based Oxypnictide And Laofege Superconductors Using Specific Heat Capacity Ahmad, Tarek Mohamed Fayez QC1 Physics (General) The most prominent indicators of superconductivity are the superconducting transition temperature (Tc) and the superconducting energy gap (Δ). These indicators associated with electronic state of temperature dependence of resistivity and specific heat measurements, respectively. The specific heat is a bulk measurement that reflects the behavior of the entire sample response. Here, we introduce a model that examines the transition characteristic to a normal/superconducting state at a critical temperature of the electron and phonon contributions of specific heat. Three basic postulates were adopted. First is that the transition of the system from normal to superconducting state, which allows phonons to bind electrons to form Cooper pairs, requiring a change in energy differences appearing in a specific heat behavior. Second, specific heat has different contributions, changing differently at Tc. This change is possibly a result of the physical function on such contributions. The third postulate is that phonon behavior can manifest superconductive property, particularly in the coexisting state. Based on the suggested superconducting transition model, which was constructed depending on the superconductive behavior of specific heat in accordance with above postulates, energy scales were obtained at normal state for iron-based oxypnictides. The pseudogap 2Δ was 14.26 meV for the SmO0.80F0.20FeAs compound, which was determined from the far-infrared reflectance spectra based on the phonon state at room temperature. 2013-10 Thesis NonPeerReviewed application/pdf en http://eprints.usm.my/43999/1/Tarek%20Mohamed%20Fayez%20Ahmad24.pdf Ahmad, Tarek Mohamed Fayez (2013) Determination Of Energy Gap Of The Iron-Based Oxypnictide And Laofege Superconductors Using Specific Heat Capacity. PhD thesis, Universiti Sains Malaysia.
institution Universiti Sains Malaysia
building Hamzah Sendut Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Sains Malaysia
content_source USM Institutional Repository
url_provider http://eprints.usm.my/
language English
topic QC1 Physics (General)
spellingShingle QC1 Physics (General)
Ahmad, Tarek Mohamed Fayez
Determination Of Energy Gap Of The Iron-Based Oxypnictide And Laofege Superconductors Using Specific Heat Capacity
description The most prominent indicators of superconductivity are the superconducting transition temperature (Tc) and the superconducting energy gap (Δ). These indicators associated with electronic state of temperature dependence of resistivity and specific heat measurements, respectively. The specific heat is a bulk measurement that reflects the behavior of the entire sample response. Here, we introduce a model that examines the transition characteristic to a normal/superconducting state at a critical temperature of the electron and phonon contributions of specific heat. Three basic postulates were adopted. First is that the transition of the system from normal to superconducting state, which allows phonons to bind electrons to form Cooper pairs, requiring a change in energy differences appearing in a specific heat behavior. Second, specific heat has different contributions, changing differently at Tc. This change is possibly a result of the physical function on such contributions. The third postulate is that phonon behavior can manifest superconductive property, particularly in the coexisting state. Based on the suggested superconducting transition model, which was constructed depending on the superconductive behavior of specific heat in accordance with above postulates, energy scales were obtained at normal state for iron-based oxypnictides. The pseudogap 2Δ was 14.26 meV for the SmO0.80F0.20FeAs compound, which was determined from the far-infrared reflectance spectra based on the phonon state at room temperature.
format Thesis
author Ahmad, Tarek Mohamed Fayez
author_facet Ahmad, Tarek Mohamed Fayez
author_sort Ahmad, Tarek Mohamed Fayez
title Determination Of Energy Gap Of The Iron-Based Oxypnictide And Laofege Superconductors Using Specific Heat Capacity
title_short Determination Of Energy Gap Of The Iron-Based Oxypnictide And Laofege Superconductors Using Specific Heat Capacity
title_full Determination Of Energy Gap Of The Iron-Based Oxypnictide And Laofege Superconductors Using Specific Heat Capacity
title_fullStr Determination Of Energy Gap Of The Iron-Based Oxypnictide And Laofege Superconductors Using Specific Heat Capacity
title_full_unstemmed Determination Of Energy Gap Of The Iron-Based Oxypnictide And Laofege Superconductors Using Specific Heat Capacity
title_sort determination of energy gap of the iron-based oxypnictide and laofege superconductors using specific heat capacity
publishDate 2013
url http://eprints.usm.my/43999/1/Tarek%20Mohamed%20Fayez%20Ahmad24.pdf
http://eprints.usm.my/43999/
_version_ 1643710889432449024
score 13.211869

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