Superconductivity in Cubic La3Al with Interstitial Anionic Electrons
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Abstract
We observed superconductivity in a cubic La_3Al single crystal that exhibits metallic behavior in the normal state without an observable structural transition and enters the superconducting state below T_\rm c\sim6.32 K. Detailed characterization and analysis indicate that cubic La_3Al is a bulk type-II BCS superconductor. Moreover, theoretical calculations show that it can host interstitial anionic electrons located at the body center of the cubic unit cell, which confirms electron-phonon coupling as the superconducting mechanism. Therefore, cubic La_3Al can be considered as a novel electride superconductor.
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Cite this article:
Zhijun Tu, Peihan Sun, Donghan Jia, Huiyang Gou, Kai Liu, Hechang Lei. Superconductivity in Cubic La3Al with Interstitial Anionic Electrons[J]. Chin. Phys. Lett., 2025, 42(2): 027302. DOI: 10.1088/0256-307X/42/2/027302
Zhijun Tu, Peihan Sun, Donghan Jia, Huiyang Gou, Kai Liu, Hechang Lei. Superconductivity in Cubic La3Al with Interstitial Anionic Electrons[J]. Chin. Phys. Lett., 2025, 42(2): 027302. DOI: 10.1088/0256-307X/42/2/027302
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Zhijun Tu, Peihan Sun, Donghan Jia, Huiyang Gou, Kai Liu, Hechang Lei. Superconductivity in Cubic La3Al with Interstitial Anionic Electrons[J]. Chin. Phys. Lett., 2025, 42(2): 027302. DOI: 10.1088/0256-307X/42/2/027302
Zhijun Tu, Peihan Sun, Donghan Jia, Huiyang Gou, Kai Liu, Hechang Lei. Superconductivity in Cubic La3Al with Interstitial Anionic Electrons[J]. Chin. Phys. Lett., 2025, 42(2): 027302. DOI: 10.1088/0256-307X/42/2/027302
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