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  Emergence of superconductivity in the canonical heavy-electron metal YbRh2Si2

Schuberth, E., Tippmann, M., Steinke, L., Lausberg, S., Steppke, A., Brando, M., et al. (2016). Emergence of superconductivity in the canonical heavy-electron metal YbRh2Si2. Science Magazine, 351(6272), 485-488. doi:10.1126/science.aaa9733.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-734C-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-658F-D
Genre: Journal Article

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 Creators:
Schuberth, E.1, Author              
Tippmann, Marc2, Author
Steinke, Lucia1, Author              
Lausberg, S.1, Author              
Steppke, Alexander1, Author              
Brando, Manuel3, Author              
Krellner, Cornelius1, Author              
Geibel, Christoph4, Author              
Yu, Rong2, Author
Si, Qimiao2, Author
Steglich, Frank5, Author              
Affiliations:
1Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
2External Organizations, ou_persistent22              
3Manuel Brando, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863469              
4Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863465              
5Frank Steglich, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863467              

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 Abstract: Quantum phase transitions (QPTs) occur at zero temperature when parameters such as magnetic field or pressure are varied. In heavy fermion compounds, superconductivity often accompanies QPTs, a seeming exception being the material YbRh2Si2, which undergoes a magnetic QPT. Schuberth et al. performed magnetic and calorimetric measurements at extremely low temperatures and magnetic fields and found that it does become superconducting after all. Almost simultaneously with superconductivity, another order appeared that showed signatures of nuclear spin origin.Science, this issue p. 485The smooth disappearance of antiferromagnetic order in strongly correlated metals commonly furnishes the development of unconventional superconductivity. The canonical heavy-electron compound YbRh2Si2 seems to represent an apparent exception from this quantum critical paradigm in that it is not a superconductor at temperature T ≥ 10 millikelvin (mK). Here we report magnetic and calorimetric measurements on YbRh2Si2, down to temperatures as low as T ≈ 1 mK. The data reveal the development of nuclear antiferromagnetic order slightly above 2 mK and of heavy-electron superconductivity almost concomitantly with this order. Our results demonstrate that superconductivity in the vicinity of quantum criticality is a general phenomenon.

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Language(s): eng - English
 Dates: 2016-01-292016-02-15
 Publication Status: Published in print
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Title: Science Magazine
  Other : Science
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Association for the Advancement of Science
Pages: - Volume / Issue: 351 (6272) Sequence Number: - Start / End Page: 485 - 488 Identifier: ISSN: 0036-8075
CoNE: /journals/resource/991042748276600