Hybrid s-wave superconductivity in CrB$_2
In a metal with multiple Fermi pockets, the formation of s-wave superconductivity can be conventional due to electron-phonon coupling or unconventional due to spin fluctuations. We analyze the hexagonal diboride CrB$_2$, which is an itinerant antiferromagnet at ambient conditions and turns supercond...
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| creator | Biswas, Sananda Kreisel, Andreas Valadkhani, Adrian Dürrnagel, Matteo Schwemmer, Tilman Thomale, Ronny Valentí, Roser Mazin, Igor I |
| description | In a metal with multiple Fermi pockets, the formation of s-wave
superconductivity can be conventional due to electron-phonon coupling or
unconventional due to spin fluctuations. We analyze the hexagonal diboride
CrB$_2$, which is an itinerant antiferromagnet at ambient conditions and turns
superconducting upon increasing pressure. While the high pressure behavior of
T$_c$ suggests conventional s-wave pairing, we find that spin fluctuations
promoting unconventional s-wave pairing become important in the vicinity of the
antiferromagnetic dome. As the symmetry class of the s-wave state is
independent of its underlying mechanism, we argue that CrB$_2$ is a realization
of a hybrid s-wave superconductor where unconventional and conventional s-wave
mechanisms team up to form a joint superconducting dome. |
| doi_str_mv | 10.48550/arxiv.2211.01054 |
| format | Article |
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superconductivity can be conventional due to electron-phonon coupling or
unconventional due to spin fluctuations. We analyze the hexagonal diboride
CrB$_2$, which is an itinerant antiferromagnet at ambient conditions and turns
superconducting upon increasing pressure. While the high pressure behavior of
T$_c$ suggests conventional s-wave pairing, we find that spin fluctuations
promoting unconventional s-wave pairing become important in the vicinity of the
antiferromagnetic dome. As the symmetry class of the s-wave state is
independent of its underlying mechanism, we argue that CrB$_2$ is a realization
of a hybrid s-wave superconductor where unconventional and conventional s-wave
mechanisms team up to form a joint superconducting dome.</description><identifier>DOI: 10.48550/arxiv.2211.01054</identifier><language>eng</language><subject>Physics - Materials Science ; Physics - Strongly Correlated Electrons ; Physics - Superconductivity</subject><creationdate>2022-11</creationdate><rights>http://arxiv.org/licenses/nonexclusive-distrib/1.0</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>228,230,776,881</link.rule.ids><linktorsrc>$$Uhttps://arxiv.org/abs/2211.01054$$EView_record_in_Cornell_University$$FView_record_in_$$GCornell_University$$Hfree_for_read</linktorsrc><backlink>$$Uhttps://doi.org/10.1103/PhysRevB.108.L020501$$DView published paper (Access to full text may be restricted)$$Hfree_for_read</backlink><backlink>$$Uhttps://doi.org/10.48550/arXiv.2211.01054$$DView paper in arXiv$$Hfree_for_read</backlink></links><search><creatorcontrib>Biswas, Sananda</creatorcontrib><creatorcontrib>Kreisel, Andreas</creatorcontrib><creatorcontrib>Valadkhani, Adrian</creatorcontrib><creatorcontrib>Dürrnagel, Matteo</creatorcontrib><creatorcontrib>Schwemmer, Tilman</creatorcontrib><creatorcontrib>Thomale, Ronny</creatorcontrib><creatorcontrib>Valentí, Roser</creatorcontrib><creatorcontrib>Mazin, Igor I</creatorcontrib><title>Hybrid s-wave superconductivity in CrB$_2</title><description>In a metal with multiple Fermi pockets, the formation of s-wave
superconductivity can be conventional due to electron-phonon coupling or
unconventional due to spin fluctuations. We analyze the hexagonal diboride
CrB$_2$, which is an itinerant antiferromagnet at ambient conditions and turns
superconducting upon increasing pressure. While the high pressure behavior of
T$_c$ suggests conventional s-wave pairing, we find that spin fluctuations
promoting unconventional s-wave pairing become important in the vicinity of the
antiferromagnetic dome. As the symmetry class of the s-wave state is
independent of its underlying mechanism, we argue that CrB$_2$ is a realization
of a hybrid s-wave superconductor where unconventional and conventional s-wave
mechanisms team up to form a joint superconducting dome.</description><subject>Physics - Materials Science</subject><subject>Physics - Strongly Correlated Electrons</subject><subject>Physics - Superconductivity</subject><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>GOX</sourceid><recordid>eNotzrtuwkAQQNFtUiDCB1DhgiaFzewLmzJYISAh0dBbM7s70kq8tAaD_z4CUt3u6ggxllCYylqYYXrErlBKygIkWDMQX-ueUvRZm9-xC1l7u4Tkzid_c9fYxWufxVNWp-W0UZ_ig_HQhtF_h2K_-tnX63y7-93U39sc56XJlTKk2fkAbGHBLJ0KC0uA2iEQl6w1z70nJHTIVUVQaiiJ2IRgQ0V6KCbv7cvaXFI8Yuqbp7l5mfUfVos8mg</recordid><startdate>20221102</startdate><enddate>20221102</enddate><creator>Biswas, Sananda</creator><creator>Kreisel, Andreas</creator><creator>Valadkhani, Adrian</creator><creator>Dürrnagel, Matteo</creator><creator>Schwemmer, Tilman</creator><creator>Thomale, Ronny</creator><creator>Valentí, Roser</creator><creator>Mazin, Igor I</creator><scope>GOX</scope></search><sort><creationdate>20221102</creationdate><title>Hybrid s-wave superconductivity in CrB$_2</title><author>Biswas, Sananda ; Kreisel, Andreas ; Valadkhani, Adrian ; Dürrnagel, Matteo ; Schwemmer, Tilman ; Thomale, Ronny ; Valentí, Roser ; Mazin, Igor I</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a674-224b3fcde0f509ff1c2e95b0a3ca0bf7f33f6ddbabacaf88b07307bbf4ee5e8b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Physics - Materials Science</topic><topic>Physics - Strongly Correlated Electrons</topic><topic>Physics - Superconductivity</topic><toplevel>online_resources</toplevel><creatorcontrib>Biswas, Sananda</creatorcontrib><creatorcontrib>Kreisel, Andreas</creatorcontrib><creatorcontrib>Valadkhani, Adrian</creatorcontrib><creatorcontrib>Dürrnagel, Matteo</creatorcontrib><creatorcontrib>Schwemmer, Tilman</creatorcontrib><creatorcontrib>Thomale, Ronny</creatorcontrib><creatorcontrib>Valentí, Roser</creatorcontrib><creatorcontrib>Mazin, Igor I</creatorcontrib><collection>arXiv.org</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Biswas, Sananda</au><au>Kreisel, Andreas</au><au>Valadkhani, Adrian</au><au>Dürrnagel, Matteo</au><au>Schwemmer, Tilman</au><au>Thomale, Ronny</au><au>Valentí, Roser</au><au>Mazin, Igor I</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Hybrid s-wave superconductivity in CrB$_2</atitle><date>2022-11-02</date><risdate>2022</risdate><abstract>In a metal with multiple Fermi pockets, the formation of s-wave
superconductivity can be conventional due to electron-phonon coupling or
unconventional due to spin fluctuations. We analyze the hexagonal diboride
CrB$_2$, which is an itinerant antiferromagnet at ambient conditions and turns
superconducting upon increasing pressure. While the high pressure behavior of
T$_c$ suggests conventional s-wave pairing, we find that spin fluctuations
promoting unconventional s-wave pairing become important in the vicinity of the
antiferromagnetic dome. As the symmetry class of the s-wave state is
independent of its underlying mechanism, we argue that CrB$_2$ is a realization
of a hybrid s-wave superconductor where unconventional and conventional s-wave
mechanisms team up to form a joint superconducting dome.</abstract><doi>10.48550/arxiv.2211.01054</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Physics - Materials Science Physics - Strongly Correlated Electrons Physics - Superconductivity |
| title | Hybrid s-wave superconductivity in CrB$_2 |
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