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Microscopic Ginzbur...
Microscopic Ginzburg-Landau theory and singlet ordering in Sr2RuO4
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- Wagner, Glenn (författare)
- Rudolf Peierls Ctr Theoret Phys, Oxford OX1 3PU, England.;Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA.
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- Røising, Henrik S. (författare)
- Stockholms universitet,Nordiska institutet för teoretisk fysik (Nordita),Rudolf Peierls Center for Theoretical Physics, United Kingdom,Rudolf Peierls Ctr Theoret Phys, Oxford OX1 3PU, England.; Stockholm Univ, Hannes Alfvens Vag 12, SE-10691 Stockholm, Sweden.;Nordita SU
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- Flicker, Felix (författare)
- Rudolf Peierls Ctr Theoret Phys, Oxford OX1 3PU, England.;Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, Wales.;Univ Bristol, Sch Math, Bristol BS8 1TW, Avon, England.
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- Simon, Steven H. (författare)
- Rudolf Peierls Ctr Theoret Phys, Oxford OX1 3PU, England.
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Rudolf Peierls Ctr Theoret Phys, Oxford OX1 3PU, England;Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA. Nordiska institutet för teoretisk fysik (Nordita) (creator_code:org_t)
- American Physical Society (APS), 2021
- 2021
- Engelska.
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Ingår i: Physical Review B. - : American Physical Society (APS). - 2469-9950 .- 2469-9969. ; 104:13
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- The long-standing quest to determine the superconducting order of Sr2RuO4 (SRO) has received renewed attention after recent nuclear magnetic resonance (NMR) Knight shift experiments have cast doubt on the possibility of spin-triplet pairing in the superconducting state. As a putative solution, encompassing a body of experiments conducted over the years, a (d + ig)-wave order parameter caused by an accidental near degeneracy has been suggested [S. A. Kivelson et al., npj Quantum Mater. 5, 43 (2020)]. Here we develop a general Ginzburg-Landau theory for multiband superconductors. We apply the theory to SRO and predict the relative size of the order parameter components. The heat capacity jump expected at the onset of the second-order parameter component is found to be above the current threshold deduced by the experimental absence of a second jump. Our results tightly restrict theories of d + ig order, and other candidates caused by a near degeneracy, in SRO. We discuss possible solutions to the problem.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
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