Unconventional superconductivity in the Kondo-lattice system CeCu$_2$Si$_2$ -- a personal perspective
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arXiv
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| Format: | Preprint |
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2023
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| _version_ | 1866914630527352832 |
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| author | Steglich, Frank |
| author_facet | Steglich, Frank |
| contents | In the first part of this article, I briefly review early research activities concerning strongly correlated electron systems, beginning with the discovery of superconductivity and the first observation of a resistance minimum in nominally pure Cu-metal, which was explained many years later by Kondo. I will also address the antagonistic behavior of conventional (BCS) superconductivity and magnetism. The main focus of this paper is on the discovery of non-BCS-type superconductivity in the Kondo-lattice system CeCu$_2$Si$_2$, a prototypical heavy-fermion metal. Here, the superconducting state is created by a periodic lattice of 100% of magnetic Ce^3+ ions. Meanwhile, more than fifty lanthanide-, actinide-, and transition-metal-based intermetallic compounds are known to belong to the class of heavy-fermion superconductors. Finally, I will give my personal view of the current knowledge of this kind of unconventional superconductivity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_11162 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Unconventional superconductivity in the Kondo-lattice system CeCu$_2$Si$_2$ -- a personal perspective Steglich, Frank Strongly Correlated Electrons Superconductivity In the first part of this article, I briefly review early research activities concerning strongly correlated electron systems, beginning with the discovery of superconductivity and the first observation of a resistance minimum in nominally pure Cu-metal, which was explained many years later by Kondo. I will also address the antagonistic behavior of conventional (BCS) superconductivity and magnetism. The main focus of this paper is on the discovery of non-BCS-type superconductivity in the Kondo-lattice system CeCu$_2$Si$_2$, a prototypical heavy-fermion metal. Here, the superconducting state is created by a periodic lattice of 100% of magnetic Ce^3+ ions. Meanwhile, more than fifty lanthanide-, actinide-, and transition-metal-based intermetallic compounds are known to belong to the class of heavy-fermion superconductors. Finally, I will give my personal view of the current knowledge of this kind of unconventional superconductivity. |
| title | Unconventional superconductivity in the Kondo-lattice system CeCu$_2$Si$_2$ -- a personal perspective |
| topic | Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2312.11162 |