Electron-phonon interaction in Gd 1-xCa xBaSrCu 3O 7-δ superconductors
Polycrystalline Gd1−xCaxBaSrCu3O7−ı samples (0 ≤ x ≤ 0.1) were prepared via solid-state reaction. The superconducting critical temperature Tc and lattice parameter decrease with doping content. Temperature dependence of the specific heat of all samples was measured with the thermal relaxation...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2012
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| Online Access: | http://eprints.intimal.edu.my/183/ http://eprints.intimal.edu.my/183/1/12.pdf |
| _version_ | 1848766414846951424 |
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| author | Chong, T.V. Kambe, S. Kawaji, H. Atake, T. Ishii, O. |
| author_facet | Chong, T.V. Kambe, S. Kawaji, H. Atake, T. Ishii, O. |
| author_sort | Chong, T.V. |
| building | INTI Institutional Repository |
| collection | Online Access |
| description | Polycrystalline Gd1−xCaxBaSrCu3O7−ı samples (0
≤
x
≤
0.1) were prepared via solid-state reaction. The
superconducting critical temperature Tc and lattice parameter decrease with doping content. Temperature
dependence of the specific heat of all samples was measured with the thermal relaxation technique
using a Physical Property Measurement System from about 2 K to 150 K. The calculated Debye temperature
D at 10 K is found to be inversely proportional to Tc. Subsequently, the electron–phonon
coupling constant was estimated based on standard BCS theory (BCS) in the weak coupling limit and twodimensional
Van Hove scenario (VH). The calculated values of VH in this study (around 0.04) are close to
the experimental data as reported by other researchers on Bi-based and YBCO samples. Hence, the twodimensional
Van Hove scenario seems to be a viable candidate for the mechanism of superconductivity
if electron–phonon coupling plays a role in superconductivity of these materials. |
| first_indexed | 2025-11-14T11:50:46Z |
| format | Article |
| id | intimal-183 |
| institution | INTI International University |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:50:46Z |
| publishDate | 2012 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | intimal-1832016-04-20T06:49:51Z http://eprints.intimal.edu.my/183/ Electron-phonon interaction in Gd 1-xCa xBaSrCu 3O 7-δ superconductors Chong, T.V. Kambe, S. Kawaji, H. Atake, T. Ishii, O. TK Electrical engineering. Electronics Nuclear engineering Polycrystalline Gd1−xCaxBaSrCu3O7−ı samples (0 ≤ x ≤ 0.1) were prepared via solid-state reaction. The superconducting critical temperature Tc and lattice parameter decrease with doping content. Temperature dependence of the specific heat of all samples was measured with the thermal relaxation technique using a Physical Property Measurement System from about 2 K to 150 K. The calculated Debye temperature D at 10 K is found to be inversely proportional to Tc. Subsequently, the electron–phonon coupling constant was estimated based on standard BCS theory (BCS) in the weak coupling limit and twodimensional Van Hove scenario (VH). The calculated values of VH in this study (around 0.04) are close to the experimental data as reported by other researchers on Bi-based and YBCO samples. Hence, the twodimensional Van Hove scenario seems to be a viable candidate for the mechanism of superconductivity if electron–phonon coupling plays a role in superconductivity of these materials. Elsevier 2012 Article PeerReviewed text en http://eprints.intimal.edu.my/183/1/12.pdf Chong, T.V. and Kambe, S. and Kawaji, H. and Atake, T. and Ishii, O. (2012) Electron-phonon interaction in Gd 1-xCa xBaSrCu 3O 7-δ superconductors. Thermochimica Acta, 532. pp. 115-118. ISSN 0040-6031 10.1016/j.tca.2010.11.032 |
| spellingShingle | TK Electrical engineering. Electronics Nuclear engineering Chong, T.V. Kambe, S. Kawaji, H. Atake, T. Ishii, O. Electron-phonon interaction in Gd 1-xCa xBaSrCu 3O 7-δ superconductors |
| title | Electron-phonon interaction in Gd 1-xCa xBaSrCu 3O 7-δ superconductors |
| title_full | Electron-phonon interaction in Gd 1-xCa xBaSrCu 3O 7-δ superconductors |
| title_fullStr | Electron-phonon interaction in Gd 1-xCa xBaSrCu 3O 7-δ superconductors |
| title_full_unstemmed | Electron-phonon interaction in Gd 1-xCa xBaSrCu 3O 7-δ superconductors |
| title_short | Electron-phonon interaction in Gd 1-xCa xBaSrCu 3O 7-δ superconductors |
| title_sort | electron-phonon interaction in gd 1-xca xbasrcu 3o 7-δ superconductors |
| topic | TK Electrical engineering. Electronics Nuclear engineering |
| url | http://eprints.intimal.edu.my/183/ http://eprints.intimal.edu.my/183/ http://eprints.intimal.edu.my/183/1/12.pdf |