Erratum: Superconductivity without Inversion Symmetry: MnSi versus<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="normal">C</mml:mi><mml:mi mathvariant="normal">e</mml:mi><mml:msub><mml:mrow><mml:mi mathvariant="normal">P</mml:mi><mml:mi mathvariant="normal">t</mml:mi></mml:mrow><mml:mn>3</mml:mn></mml:msub><mml:mi mathvariant="normal">S</mml:mi><mml:mi mathvariant="normal">i</mml:mi></mml:math>[Phys. Rev. Lett.<b>92</b>, 097001 (2004)]

Frigeri, P.A.; Agterberg, D. F.; Koga, Akihisa; Sigrist, Manfred

doi:10.1103/physrevlett.93.099903

Cited by 376 publications

(728 citation statements)

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“…(4) and (5), immediately results in d (k) ĝ(k), which coincides with the result obtained by Frigeri et al [3] Hence, we can define the scalar operatord(k) such thatd(k) =d(k)ĝ(k). Since d(k) andĝ(k) are of odd parity, the operatord(k) is of even parity.…”

Section: Formulationsupporting

confidence: 89%

“…We have presented a formulation of the superconductivity, and obtained the transition temperatures and gap functions, including the results that have been obtained by previous authors [1][2][3]8]. We have derived the pairing interaction eq.…”

Section: Summary and Discussionmentioning

confidence: 98%

“…The results of specific heat measurement and muon-spin rotation experiment by Häfliger et al indicate that the whole family of Li 2 (Pd 1−x Pt x ) 3 B comprises single-gap s-wave superconductors across the entire doping regime [16]. The H-T phase diagram and several superconducting parameters obtained by Peets et al exhibit a continuous change as functions of the doping ratio x [17].…”

Section: Introductionmentioning

confidence: 97%

“…Recently, superconductors without inversion symmetry have been studied extensively owing to their unconventional features [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. A strong spin-orbit coupling results in the splitting of electronic bands, in which the direction of the electron spin depends on momentum.…”

Section: Introductionmentioning

confidence: 99%

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Phase Diagrams of Noncentrosymmetric Superconductors

Seki

2013

J. Phys. Soc. Jpn.

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Noncentrosymmetric superconductors with various types of pairing interactions are systematically examined with particular focus on phenomena that originate from the differences between Fermi surfaces split by a strong spin-orbit coupling. In particular, when the spin-orbit coupling increases and one of the split Fermi surfaces disappears, the phase diagram and the structure of the gap function change drastically. For example, we examine the conditions for the transition from full-gap states to line-node states (FLT), which may explain the differences in the experimental results between the noncentrosymmetric superconductors Li 2 Pd 3 B and Li 2 Pt 3 B discovered recently. The dominant pairing interactions and gap functions can be predicted to some extent by comparing the theoretical and experimental results for these compounds. For example, if the FLT occurs by replacing Pd with Pt, it is most likely that the superconductivity is mainly induced by charge-charge interactions, and if this is the case, the superconductivities in Li 2 Pd 3 B and Li 2 Pt 3 B are an s-wave nearly spin-triplet state and a d-wave state that has both spin-singlet and triplet components of comparable weights, respectively. Comparing the theoretical phase diagrams in simple models, it is found that the FLT occurs in a wider realistic parameter region for chargecharge interactions, i.e., where short-range Coulomb repulsion is strong and p-wave and d-wave interactions are attractive, while it occurs in narrower rather unrealistic parameter regions for interactions of magnetic origin. It is also found that d-wave spin-triplet pairing may occur, when pairing interactions are of magnetic origin and anisotropic in spin space.

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Section: Formulationsupporting

confidence: 89%

Section: Summary and Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Phase Diagrams of Noncentrosymmetric Superconductors

Seki

2013

J. Phys. Soc. Jpn.

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“…We see an extraordinarily large normalized upper critical field, µ B H c2 /T c > 5.5, beyond the Pauli-Clogston-Chandrasekar limit, µ B H c2 /T c = 1.25 [19], for (t odd , λ) = (0.1, 0.1). It has been shown that the upper critical field is enhanced by the Rashba spin-orbit coupling [20], but that the enhancement is minor in the canonical Rashba-type non-centrosymmetric superconductors as µ B H c2 /T c ≈ 2 [21]. We will show that the combination of the Rashba spin-orbit coupling and orbital degree of freedom gives rise to a large upper critical field shown in Fig.…”

Section: Numerical Resultsmentioning

confidence: 69%

Theory of Multi-Orbital Superconductivity in SrTiO₃/LaAlO₃Interface

Nakamura¹,

Yanase²

2014

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2013)

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We investigate the superconductivity in two-dimensional electron systems formed in SrTiO 3 nanostructures. Our theoretical analysis is based on the three-orbital model, which takes into account t 2g orbitals of Ti ions. We find that the Rashba spin-orbit coupling stabilizes a quasi-one-dimensional superconducting phase at high magnetic fields along interfaces. This quasi-one-dimensional superconducting phase is protected against paramagnetic depairing effects by the Rashba spin-orbit coupling and realizes a large upper critical field H c2 beyond the Pauli-Clogston-Chandrasekhar limit.

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NbIr₂B₂ and TaIr₂B₂ – New Low Symmetry Noncentrosymmetric Superconductors with Strong Spin–Orbit Coupling

Górnicka

Gui

Wiendlocha

et al. 2020

Adv Funct Materials

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Superconductivity was first observed more than a century ago, but the search for new superconducting materials remains a challenge. The Cooper pairs in superconductors are ideal embodiments of quantum entanglement. Thus, novel superconductors can be critical for both learning about electronic systems in condensed matter and for possible application in future quantum technologies. Here two previously unreported materials, NbIr 2 B 2 and TaIr 2 B 2 , are presented with superconducting transitions at 7.2 and 5.2 K, respectively. They display a unique noncentrosymmetric crystal structure, and for both compounds the magnetic field that destroys the superconductivity at 0 K exceeds one of the fundamental characteristics of conventional superconductors (the "Pauli limit"), suggesting that the superconductivity may be unconventional. Supporting this experimentally based deduction, first-principle calculations show a spinsplit Fermi surface due to the presence of strong spin-orbit coupling. These materials may thus provide an excellent platform for the study of unconventional superconductivity in intermetallic compounds.

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Erratum: Superconductivity without Inversion Symmetry: MnSi versusCePt3Si[Phys. Rev. Lett.92, 097001 (2004)]

Cited by 376 publications

References 1 publication

Phase Diagrams of Noncentrosymmetric Superconductors

Phase Diagrams of Noncentrosymmetric Superconductors

Theory of Multi-Orbital Superconductivity in SrTiO₃/LaAlO₃Interface

NbIr₂B₂ and TaIr₂B₂ – New Low Symmetry Noncentrosymmetric Superconductors with Strong Spin–Orbit Coupling

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Erratum: Superconductivity without Inversion Symmetry: MnSi versusCePt3Si[Phys. Rev. Lett.92, 097001 (2004)]

Cited by 376 publications

References 1 publication

Phase Diagrams of Noncentrosymmetric Superconductors

Phase Diagrams of Noncentrosymmetric Superconductors

Theory of Multi-Orbital Superconductivity in SrTiO3/LaAlO3Interface

NbIr2B2 and TaIr2B2 – New Low Symmetry Noncentrosymmetric Superconductors with Strong Spin–Orbit Coupling

Contact Info

Product

Resources

About

Theory of Multi-Orbital Superconductivity in SrTiO₃/LaAlO₃Interface

NbIr₂B₂ and TaIr₂B₂ – New Low Symmetry Noncentrosymmetric Superconductors with Strong Spin–Orbit Coupling