Calcium effect on the Nernst coefficient in double-substituted Y1-xCaxBa2Cu2.8Zn0.2Oy
We present experimental results on the temperature dependence of the Nernst coefficient in the normal state of the system Y1-xCaxBa2Cu2.8Zn0.2Oy, analyzed quantitatively using a narrow-band model jointly with temperature dependences of the thermopower. From this analysis, we determine the charge ca...
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Herzen State Pedagogical University of Russia
2025-06-01
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| Series: | Physics of Complex Systems |
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| Online Access: | https://physcomsys.ru/index.php/physcomsys/article/view/214 |
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| author | Чжан Суньпэн Виталий Эдуардович Гасумянц |
| author_facet | Чжан Суньпэн Виталий Эдуардович Гасумянц |
| author_sort | Чжан Суньпэн |
| collection | DOAJ |
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We present experimental results on the temperature dependence of the Nernst coefficient in the normal state of the system Y1-xCaxBa2Cu2.8Zn0.2Oy, analyzed quantitatively using a narrow-band model jointly with temperature dependences of the thermopower. From this analysis, we determine the charge carrier mobility across all studied samples and then analyze its variation with increasing calcium content. It is shown that all experimental and calculated results can be explained if we take into account that both calcium and zinc directly affect the structure of the band responsible for the conduction process in the YBa2Cu3Oy system. Calcium introduced into the lattice compensates for local disturbances in the electronic structure created by zinc, as a result of which the values of all parameters of the normal state at x ≥ 0.125 become close to the ones characteristic of undoped YBa2Cu3Oy.
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| format | Article |
| id | doaj-art-dbd366152c4b4ad08a4f8c1d225f9369 |
| institution | Kabale University |
| issn | 2687-153X |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Herzen State Pedagogical University of Russia |
| record_format | Article |
| series | Physics of Complex Systems |
| spelling | doaj-art-dbd366152c4b4ad08a4f8c1d225f93692025-08-20T03:50:22ZengHerzen State Pedagogical University of RussiaPhysics of Complex Systems2687-153X2025-06-016210.33910/2687-153X-2025-6-2-59-68Calcium effect on the Nernst coefficient in double-substituted Y1-xCaxBa2Cu2.8Zn0.2OyЧжан Суньпэн0https://orcid.org/0009-0009-7721-5425Виталий Эдуардович Гасумянц1https://orcid.org/0000-0002-5306-6738Peter the Great St. Petersburg Polytechnic University Peter the Great St. Petersburg Polytechnic University; Herzen State Pedagogical University of Russia We present experimental results on the temperature dependence of the Nernst coefficient in the normal state of the system Y1-xCaxBa2Cu2.8Zn0.2Oy, analyzed quantitatively using a narrow-band model jointly with temperature dependences of the thermopower. From this analysis, we determine the charge carrier mobility across all studied samples and then analyze its variation with increasing calcium content. It is shown that all experimental and calculated results can be explained if we take into account that both calcium and zinc directly affect the structure of the band responsible for the conduction process in the YBa2Cu3Oy system. Calcium introduced into the lattice compensates for local disturbances in the electronic structure created by zinc, as a result of which the values of all parameters of the normal state at x ≥ 0.125 become close to the ones characteristic of undoped YBa2Cu3Oy. https://physcomsys.ru/index.php/physcomsys/article/view/214Y-based HTSCdopingNernst coefficientnarrow-band modelenergy spectrumcharge carrier mobility |
| spellingShingle | Чжан Суньпэн Виталий Эдуардович Гасумянц Calcium effect on the Nernst coefficient in double-substituted Y1-xCaxBa2Cu2.8Zn0.2Oy Physics of Complex Systems Y-based HTSC doping Nernst coefficient narrow-band model energy spectrum charge carrier mobility |
| title | Calcium effect on the Nernst coefficient in double-substituted Y1-xCaxBa2Cu2.8Zn0.2Oy |
| title_full | Calcium effect on the Nernst coefficient in double-substituted Y1-xCaxBa2Cu2.8Zn0.2Oy |
| title_fullStr | Calcium effect on the Nernst coefficient in double-substituted Y1-xCaxBa2Cu2.8Zn0.2Oy |
| title_full_unstemmed | Calcium effect on the Nernst coefficient in double-substituted Y1-xCaxBa2Cu2.8Zn0.2Oy |
| title_short | Calcium effect on the Nernst coefficient in double-substituted Y1-xCaxBa2Cu2.8Zn0.2Oy |
| title_sort | calcium effect on the nernst coefficient in double substituted y1 xcaxba2cu2 8zn0 2oy |
| topic | Y-based HTSC doping Nernst coefficient narrow-band model energy spectrum charge carrier mobility |
| url | https://physcomsys.ru/index.php/physcomsys/article/view/214 |
| work_keys_str_mv | AT čžansunʹpén calciumeffectonthenernstcoefficientindoublesubstitutedy1xcaxba2cu28zn02oy AT vitalijéduardovičgasumânc calciumeffectonthenernstcoefficientindoublesubstitutedy1xcaxba2cu28zn02oy |