Electron–phonon coupling in superconducting 1T-PdTe2
Abstract We have determined the electron–phonon interaction in type II Dirac semimetallic 1T-PdTe2 by means of helium atom scattering. While 1T-PdTe2 is isostructural with 1T-PtTe2, only the former is superconductor. The difference can be traced to the substantially larger value of the electron–phon...
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Nature Portfolio
2021
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oai:doaj.org-article:e7747a9dff20420aa0967ced29a3ce6d2021-12-02T11:02:39ZElectron–phonon coupling in superconducting 1T-PdTe210.1038/s41699-021-00204-52397-7132https://doaj.org/article/e7747a9dff20420aa0967ced29a3ce6d2021-02-01T00:00:00Zhttps://doi.org/10.1038/s41699-021-00204-5https://doaj.org/toc/2397-7132Abstract We have determined the electron–phonon interaction in type II Dirac semimetallic 1T-PdTe2 by means of helium atom scattering. While 1T-PdTe2 is isostructural with 1T-PtTe2, only the former is superconductor. The difference can be traced to the substantially larger value of the electron–phonon coupling in 1T-PdTe2, λ = 0.58, obtained from the Debye-Waller attenuation of the He specular peak. With this value and the surface Debye temperature, ΘD = 106.2 K, we have figured out the superconducting critical temperature, T c = 1.83 K given by the BCS theory, which is in good agreement with T c = (1.95 ± 0.03) K obtained with low-temperature scanning tunneling microscopy. The value of the effective mass related to ΘD indicates that the large electron–phonon coupling in 1T-PdTe2 is due to coupling, not only with the zone-center optical mode O2 at 9.2 meV, as proposed in a recent theoretical study, but also with the zone-boundary acoustic mode LA. Our results suggest that the topological states of a Dirac cone play a negligible role on the onset of superconductivity.Gloria AnemonePablo Casado AguilarManuela GarnicaFabian CallejaAmjad Al TalebChia-Nung KuoChin Shan LueAntonio PolitanoAmadeo L. Vázquez de PargaGiorgio BenedekDaniel FaríasRodolfo MirandaNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492ChemistryQD1-999ENnpj 2D Materials and Applications, Vol 5, Iss 1, Pp 1-7 (2021) |
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Materials of engineering and construction. Mechanics of materials TA401-492 Chemistry QD1-999 |
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Materials of engineering and construction. Mechanics of materials TA401-492 Chemistry QD1-999 Gloria Anemone Pablo Casado Aguilar Manuela Garnica Fabian Calleja Amjad Al Taleb Chia-Nung Kuo Chin Shan Lue Antonio Politano Amadeo L. Vázquez de Parga Giorgio Benedek Daniel Farías Rodolfo Miranda Electron–phonon coupling in superconducting 1T-PdTe2 |
| description |
Abstract We have determined the electron–phonon interaction in type II Dirac semimetallic 1T-PdTe2 by means of helium atom scattering. While 1T-PdTe2 is isostructural with 1T-PtTe2, only the former is superconductor. The difference can be traced to the substantially larger value of the electron–phonon coupling in 1T-PdTe2, λ = 0.58, obtained from the Debye-Waller attenuation of the He specular peak. With this value and the surface Debye temperature, ΘD = 106.2 K, we have figured out the superconducting critical temperature, T c = 1.83 K given by the BCS theory, which is in good agreement with T c = (1.95 ± 0.03) K obtained with low-temperature scanning tunneling microscopy. The value of the effective mass related to ΘD indicates that the large electron–phonon coupling in 1T-PdTe2 is due to coupling, not only with the zone-center optical mode O2 at 9.2 meV, as proposed in a recent theoretical study, but also with the zone-boundary acoustic mode LA. Our results suggest that the topological states of a Dirac cone play a negligible role on the onset of superconductivity. |
| format |
article |
| author |
Gloria Anemone Pablo Casado Aguilar Manuela Garnica Fabian Calleja Amjad Al Taleb Chia-Nung Kuo Chin Shan Lue Antonio Politano Amadeo L. Vázquez de Parga Giorgio Benedek Daniel Farías Rodolfo Miranda |
| author_facet |
Gloria Anemone Pablo Casado Aguilar Manuela Garnica Fabian Calleja Amjad Al Taleb Chia-Nung Kuo Chin Shan Lue Antonio Politano Amadeo L. Vázquez de Parga Giorgio Benedek Daniel Farías Rodolfo Miranda |
| author_sort |
Gloria Anemone |
| title |
Electron–phonon coupling in superconducting 1T-PdTe2 |
| title_short |
Electron–phonon coupling in superconducting 1T-PdTe2 |
| title_full |
Electron–phonon coupling in superconducting 1T-PdTe2 |
| title_fullStr |
Electron–phonon coupling in superconducting 1T-PdTe2 |
| title_full_unstemmed |
Electron–phonon coupling in superconducting 1T-PdTe2 |
| title_sort |
electron–phonon coupling in superconducting 1t-pdte2 |
| publisher |
Nature Portfolio |
| publishDate |
2021 |
| url |
https://doaj.org/article/e7747a9dff20420aa0967ced29a3ce6d |
| work_keys_str_mv |
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| _version_ |
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