Theoretical Study of Superconducting Gap Parameters, Density of States, and Condensation Energy of TwoBand IronBased Superconductor BaFe{sub 2}(As{sub 1−x}P{sub x}){sub 2}
Abstract
This research work focuses on the theoretical study of superconducting gap parameters, density of states, and condensation energy of twoband ironbased superconductor BaFe{sub 2}(As{sub 1−x}P{sub x}){sub 2}. By developing a model Hamiltonian for the given system and by using the double time temperaturedependent Green’s function formalism, we obtained mathematical expressions for superconducting order parameters for the electron intraband (Δ{sub e}), hole intraband (Δ{sub h}), interband between the two bands (Δ{sub eh}) and superconducting transition temperature (T{sub C}). Furthermore, we obtained the density of states for each intraband, N(ε) and condensation energy (E{sub c}) for BaFe{sub 2}(As{sub 1−x}P{sub x}){sub 2}. By using the experimental values and by considering some plausible approximations of the parameters in the obtained expressions, phase diagrams of superconducting order parameters for Δ{sub e}, Δ{sub h}, and Δ{sub eh} versus temperature and superconducting transition temperature (T{sub C}) versus the interband pairing potential (V{sub eh}) are plotted. We also plotted the density of states for the electron intraband, N{sub e}(ε) and hole intraband, N{sub h}(ε) versus excitation energy (ε) at T = 0K, and the variation of density of states with temperature. Similarly, phase diagrams of condensation energy (E{sub c}) versus temperature, interband pairing potential, and superconducting transition temperaturemore »
 Authors:

 Bahir Dar University, Department of Physics, College of Science (Ethiopia)
 Publication Date:
 OSTI Identifier:
 22774149
 Resource Type:
 Journal Article
 Journal Name:
 Journal of Superconductivity and Novel Magnetism
 Additional Journal Information:
 Journal Volume: 31; Journal Issue: 1; Other Information: Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; Article Copyright (c) 2017 Springer Science+Business Media New York; http://www.springerny.com; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 15571939
 Country of Publication:
 United States
 Language:
 English
 Subject:
 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DENSITY OF STATES; ELECTRONS; EXCITATION; GREEN FUNCTION; HAMILTONIANS; HOLES; IRON BASE ALLOYS; ORDER PARAMETERS; PHASE DIAGRAMS; SUPERCONDUCTORS; TEMPERATURE DEPENDENCE; TRANSITION TEMPERATURE
Citation Formats
Kidanemariam, Tsadik, and Kahsay, Gebregziabher. Theoretical Study of Superconducting Gap Parameters, Density of States, and Condensation Energy of TwoBand IronBased Superconductor BaFe{sub 2}(As{sub 1−x}P{sub x}){sub 2}. United States: N. p., 2018.
Web. doi:10.1007/S1094801741915.
Kidanemariam, Tsadik, & Kahsay, Gebregziabher. Theoretical Study of Superconducting Gap Parameters, Density of States, and Condensation Energy of TwoBand IronBased Superconductor BaFe{sub 2}(As{sub 1−x}P{sub x}){sub 2}. United States. https://doi.org/10.1007/S1094801741915
Kidanemariam, Tsadik, and Kahsay, Gebregziabher. Mon .
"Theoretical Study of Superconducting Gap Parameters, Density of States, and Condensation Energy of TwoBand IronBased Superconductor BaFe{sub 2}(As{sub 1−x}P{sub x}){sub 2}". United States. https://doi.org/10.1007/S1094801741915.
@article{osti_22774149,
title = {Theoretical Study of Superconducting Gap Parameters, Density of States, and Condensation Energy of TwoBand IronBased Superconductor BaFe{sub 2}(As{sub 1−x}P{sub x}){sub 2}},
author = {Kidanemariam, Tsadik and Kahsay, Gebregziabher},
abstractNote = {This research work focuses on the theoretical study of superconducting gap parameters, density of states, and condensation energy of twoband ironbased superconductor BaFe{sub 2}(As{sub 1−x}P{sub x}){sub 2}. By developing a model Hamiltonian for the given system and by using the double time temperaturedependent Green’s function formalism, we obtained mathematical expressions for superconducting order parameters for the electron intraband (Δ{sub e}), hole intraband (Δ{sub h}), interband between the two bands (Δ{sub eh}) and superconducting transition temperature (T{sub C}). Furthermore, we obtained the density of states for each intraband, N(ε) and condensation energy (E{sub c}) for BaFe{sub 2}(As{sub 1−x}P{sub x}){sub 2}. By using the experimental values and by considering some plausible approximations of the parameters in the obtained expressions, phase diagrams of superconducting order parameters for Δ{sub e}, Δ{sub h}, and Δ{sub eh} versus temperature and superconducting transition temperature (T{sub C}) versus the interband pairing potential (V{sub eh}) are plotted. We also plotted the density of states for the electron intraband, N{sub e}(ε) and hole intraband, N{sub h}(ε) versus excitation energy (ε) at T = 0K, and the variation of density of states with temperature. Similarly, phase diagrams of condensation energy (E{sub c}) versus temperature, interband pairing potential, and superconducting transition temperature are plotted for the material. Our results are in agreement with previous findings.},
doi = {10.1007/S1094801741915},
url = {https://www.osti.gov/biblio/22774149},
journal = {Journal of Superconductivity and Novel Magnetism},
issn = {15571939},
number = 1,
volume = 31,
place = {United States},
year = {2018},
month = {1}
}