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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2015, Volume 102, Issue 6, Pages 399–404
DOI: https://doi.org/10.7868/S0370274X15180083
(Mi jetpl4733)
 

This article is cited in 18 scientific papers (total in 18 papers)

CONDENSED MATTER

Superconducting phase with the ($d+id$) order parameter in an ensemble of Hubbard fermions on the triangular lattice

V. V. Val'kova, T. A. Val'kovab, V. A. Mitskanac

a Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russia
b Siberian Federal University, Krasnoyarsk, 660041, Russia
c Reshetnev Siberian State Aerospace University, Krasnoyarsk, 660014, Russia
References:
Abstract: In the framework of the $t{-}J_1{-}J_2{-}V$ model, the integral equation determining the order parameter $\Delta(p)$ of the superconducting phase is derived for an ensemble of strongly correlated fermions on a triangular lattice using the diagram technique for the Hubbard operators. Taking into account the interaction between the Hubbard fermions within two coordination spheres, we demonstrate that the exact analytical solution $\Delta_2(p)$ of this equation for the superconducting phase with the ($d_{x^2-y^2}+id_{xy}$) symmetry can be expressed as a superposition of two chiral basis functions. This gives rise to a new set of nodal points for the complex parameter $\Delta_2(p)$. Moreover, at some critical value $x_c$ of the charge carrier density, we obtain a gapless phase with six Dirac points. The passing of $x$ through $x=x_c$ is accompanied by the topological quantum transition corresponding to the change in the topological parameter $Q$.
Received: 07.07.2015
Revised: 05.08.2015
English version:
Journal of Experimental and Theoretical Physics Letters, 2015, Volume 102, Issue 6, Pages 361–366
DOI: https://doi.org/10.1134/S0021364015180162
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: V. V. Val'kov, T. A. Val'kova, V. A. Mitskan, “Superconducting phase with the ($d+id$) order parameter in an ensemble of Hubbard fermions on the triangular lattice”, Pis'ma v Zh. Èksper. Teoret. Fiz., 102:6 (2015), 399–404; JETP Letters, 102:6 (2015), 361–366
Citation in format AMSBIB
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\paper Superconducting phase with the ($d+id$) order parameter in an ensemble of Hubbard fermions on the triangular lattice
\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2015
\vol 102
\issue 6
\pages 399--404
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\crossref{https://doi.org/10.7868/S0370274X15180083}
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\jour JETP Letters
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\vol 102
\issue 6
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  • This publication is cited in the following 18 articles:
    Citing articles in Google Scholar: Russian citations, English citations
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