Enhancing Superconductivity of the Nonmagnetic Quasiskutterudites by Atomic Disorder
We investigated the effect of enhancement of superconducting transition temperature <inline-formula><math display="inline"><semantics><msub><mi>T</mi><mi>c</mi></msub></semantics></math></inline-formula> by nonmagnetic...
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MDPI AG
2020-12-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/24/5830 |
| _version_ | 1797543964988932096 |
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| author | Andrzej Ślebarski Maciej M. Maśka |
| author_facet | Andrzej Ślebarski Maciej M. Maśka |
| author_sort | Andrzej Ślebarski |
| collection | DOAJ |
| description | We investigated the effect of enhancement of superconducting transition temperature <inline-formula><math display="inline"><semantics><msub><mi>T</mi><mi>c</mi></msub></semantics></math></inline-formula> by nonmagnetic atom disorder in the series of filled skutterudite-related compounds (La<inline-formula><math display="inline"><semantics><mrow><msub><mrow></mrow><mn>3</mn></msub><msub><mi>M</mi><mn>4</mn></msub></mrow></semantics></math></inline-formula>Sn<inline-formula><math display="inline"><semantics><msub><mrow></mrow><mn>13</mn></msub></semantics></math></inline-formula>, Ca<inline-formula><math display="inline"><semantics><msub><mrow></mrow><mn>3</mn></msub></semantics></math></inline-formula>Rh<inline-formula><math display="inline"><semantics><msub><mrow></mrow><mn>4</mn></msub></semantics></math></inline-formula>Sn<inline-formula><math display="inline"><semantics><msub><mrow></mrow><mn>13</mn></msub></semantics></math></inline-formula>, Y<inline-formula><math display="inline"><semantics><msub><mrow></mrow><mn>5</mn></msub></semantics></math></inline-formula>Rh<inline-formula><math display="inline"><semantics><msub><mrow></mrow><mn>6</mn></msub></semantics></math></inline-formula>Sn<inline-formula><math display="inline"><semantics><msub><mrow></mrow><mn>18</mn></msub></semantics></math></inline-formula>, Lu<inline-formula><math display="inline"><semantics><msub><mrow></mrow><mn>5</mn></msub></semantics></math></inline-formula>Rh<inline-formula><math display="inline"><semantics><msub><mrow></mrow><mn>6</mn></msub></semantics></math></inline-formula>Sn<inline-formula><math display="inline"><semantics><msub><mrow></mrow><mn>18</mn></msub></semantics></math></inline-formula>; <inline-formula><math display="inline"><semantics><mrow><mi>M</mi><mo>=</mo></mrow></semantics></math></inline-formula> Co, Ru, Rh), where the atomic disorder is generated by various defects or doping. We have shown that the disorder on the coherence length scale <inline-formula><math display="inline"><semantics><mi>ξ</mi></semantics></math></inline-formula> in these nonmagnetic quasiskutterudite superconductors additionally generates a non-homogeneous, <i>high-temperature</i> superconducting phase with <inline-formula><math display="inline"><semantics><mrow><msubsup><mi>T</mi><mi>c</mi><mo>⋆</mo></msubsup><mo>></mo><msub><mi>T</mi><mi>c</mi></msub></mrow></semantics></math></inline-formula> (dilute disorder scenario), while the strong fluctuations of stoichiometry due to increasing doping can rapidly increase the superconducting transition temperature of the sample even to the value of <inline-formula><math display="inline"><semantics><mrow><msubsup><mi>T</mi><mi>c</mi><mo>⋆</mo></msubsup><mo>∼</mo><mn>2</mn><msub><mi>T</mi><mi>c</mi></msub></mrow></semantics></math></inline-formula> (dense disorder leading to strong inhomogeneity). This phenomenon seems to be characteristic of high-temperature superconductors and superconducting heavy fermions, and recently have received renewed attention. We experimentally documented the stronger lattice stiffening of the inhomogeneous superconducting phase <inline-formula><math display="inline"><semantics><msubsup><mi>T</mi><mi>c</mi><mo>⋆</mo></msubsup></semantics></math></inline-formula> in respect to the bulk <inline-formula><math display="inline"><semantics><msub><mi>T</mi><mi>c</mi></msub></semantics></math></inline-formula> one and proposed a model that explains the <inline-formula><math display="inline"><semantics><mrow><msubsup><mi>T</mi><mi>c</mi><mo>⋆</mo></msubsup><mo>></mo><msub><mi>T</mi><mi>c</mi></msub></mrow></semantics></math></inline-formula> behavior in the series of nonmagnetic skutterudite-related compounds. |
| first_indexed | 2024-03-10T13:53:13Z |
| format | Article |
| id | doaj.art-01b2525b51fc459d81cfa6f0cfaffdaa |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T13:53:13Z |
| publishDate | 2020-12-01 |
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| spelling | doaj.art-01b2525b51fc459d81cfa6f0cfaffdaa2023-11-21T01:54:19ZengMDPI AGMaterials1996-19442020-12-011324583010.3390/ma13245830Enhancing Superconductivity of the Nonmagnetic Quasiskutterudites by Atomic DisorderAndrzej Ślebarski0Maciej M. Maśka1Institute of Physics, University of Silesia in Katowice, 75 Pułku Piechoty 1, 41-500 Chorzów, PolandDepartment of Theoretical Physics, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, PolandWe investigated the effect of enhancement of superconducting transition temperature <inline-formula><math display="inline"><semantics><msub><mi>T</mi><mi>c</mi></msub></semantics></math></inline-formula> by nonmagnetic atom disorder in the series of filled skutterudite-related compounds (La<inline-formula><math display="inline"><semantics><mrow><msub><mrow></mrow><mn>3</mn></msub><msub><mi>M</mi><mn>4</mn></msub></mrow></semantics></math></inline-formula>Sn<inline-formula><math display="inline"><semantics><msub><mrow></mrow><mn>13</mn></msub></semantics></math></inline-formula>, Ca<inline-formula><math display="inline"><semantics><msub><mrow></mrow><mn>3</mn></msub></semantics></math></inline-formula>Rh<inline-formula><math display="inline"><semantics><msub><mrow></mrow><mn>4</mn></msub></semantics></math></inline-formula>Sn<inline-formula><math display="inline"><semantics><msub><mrow></mrow><mn>13</mn></msub></semantics></math></inline-formula>, Y<inline-formula><math display="inline"><semantics><msub><mrow></mrow><mn>5</mn></msub></semantics></math></inline-formula>Rh<inline-formula><math display="inline"><semantics><msub><mrow></mrow><mn>6</mn></msub></semantics></math></inline-formula>Sn<inline-formula><math display="inline"><semantics><msub><mrow></mrow><mn>18</mn></msub></semantics></math></inline-formula>, Lu<inline-formula><math display="inline"><semantics><msub><mrow></mrow><mn>5</mn></msub></semantics></math></inline-formula>Rh<inline-formula><math display="inline"><semantics><msub><mrow></mrow><mn>6</mn></msub></semantics></math></inline-formula>Sn<inline-formula><math display="inline"><semantics><msub><mrow></mrow><mn>18</mn></msub></semantics></math></inline-formula>; <inline-formula><math display="inline"><semantics><mrow><mi>M</mi><mo>=</mo></mrow></semantics></math></inline-formula> Co, Ru, Rh), where the atomic disorder is generated by various defects or doping. We have shown that the disorder on the coherence length scale <inline-formula><math display="inline"><semantics><mi>ξ</mi></semantics></math></inline-formula> in these nonmagnetic quasiskutterudite superconductors additionally generates a non-homogeneous, <i>high-temperature</i> superconducting phase with <inline-formula><math display="inline"><semantics><mrow><msubsup><mi>T</mi><mi>c</mi><mo>⋆</mo></msubsup><mo>></mo><msub><mi>T</mi><mi>c</mi></msub></mrow></semantics></math></inline-formula> (dilute disorder scenario), while the strong fluctuations of stoichiometry due to increasing doping can rapidly increase the superconducting transition temperature of the sample even to the value of <inline-formula><math display="inline"><semantics><mrow><msubsup><mi>T</mi><mi>c</mi><mo>⋆</mo></msubsup><mo>∼</mo><mn>2</mn><msub><mi>T</mi><mi>c</mi></msub></mrow></semantics></math></inline-formula> (dense disorder leading to strong inhomogeneity). This phenomenon seems to be characteristic of high-temperature superconductors and superconducting heavy fermions, and recently have received renewed attention. We experimentally documented the stronger lattice stiffening of the inhomogeneous superconducting phase <inline-formula><math display="inline"><semantics><msubsup><mi>T</mi><mi>c</mi><mo>⋆</mo></msubsup></semantics></math></inline-formula> in respect to the bulk <inline-formula><math display="inline"><semantics><msub><mi>T</mi><mi>c</mi></msub></semantics></math></inline-formula> one and proposed a model that explains the <inline-formula><math display="inline"><semantics><mrow><msubsup><mi>T</mi><mi>c</mi><mo>⋆</mo></msubsup><mo>></mo><msub><mi>T</mi><mi>c</mi></msub></mrow></semantics></math></inline-formula> behavior in the series of nonmagnetic skutterudite-related compounds.https://www.mdpi.com/1996-1944/13/24/5830skutterudite-related superconductorssuperconductivityBCS theoryatomic disorder |
| spellingShingle | Andrzej Ślebarski Maciej M. Maśka Enhancing Superconductivity of the Nonmagnetic Quasiskutterudites by Atomic Disorder Materials skutterudite-related superconductors superconductivity BCS theory atomic disorder |
| title | Enhancing Superconductivity of the Nonmagnetic Quasiskutterudites by Atomic Disorder |
| title_full | Enhancing Superconductivity of the Nonmagnetic Quasiskutterudites by Atomic Disorder |
| title_fullStr | Enhancing Superconductivity of the Nonmagnetic Quasiskutterudites by Atomic Disorder |
| title_full_unstemmed | Enhancing Superconductivity of the Nonmagnetic Quasiskutterudites by Atomic Disorder |
| title_short | Enhancing Superconductivity of the Nonmagnetic Quasiskutterudites by Atomic Disorder |
| title_sort | enhancing superconductivity of the nonmagnetic quasiskutterudites by atomic disorder |
| topic | skutterudite-related superconductors superconductivity BCS theory atomic disorder |
| url | https://www.mdpi.com/1996-1944/13/24/5830 |
| work_keys_str_mv | AT andrzejslebarski enhancingsuperconductivityofthenonmagneticquasiskutteruditesbyatomicdisorder AT maciejmmaska enhancingsuperconductivityofthenonmagneticquasiskutteruditesbyatomicdisorder |