Coexistence of nematic order and superconductivity in the Hubbard model

J. Kaczmarczyk, T. Schickling, J. Bünemann, Physical Review B - Condensed Matter and Materials Physics 94 (2016).


Journal Article | Published | English
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Abstract
We study the interplay of nematic and superconducting order in the two-dimensional Hubbard model and show that they can coexist, especially when superconductivity is not the energetically dominant phase. Due to a breaking of the C4 symmetry, the coexisting phase inherently contains admixture of the s-wave pairing components. As a result, the superconducting gap exhibits nonstandard features including changed nodal directions. Our results also show that in the optimally doped regime the pure superconducting phase is typically unstable towards developing nematicity (breaking of the C4 symmetry). This has implications for the cuprate high-Tc superconductors, for which in this regime the so-called intertwined orders have recently been observed. Namely, the coexisting phase may be viewed as a precursor to such more involved patterns of symmetry breaking.
Publishing Year
Date Published
2016-08-30
Journal Title
Physical Review B - Condensed Matter and Materials Physics
Acknowledgement
The authors are grateful to Florian Gebhard and Mikhail Lemeshko for discussions and critical reading of the manuscript. The work was supported by the Ministry of Science and Higher Education in Poland through the Iuventus Plus Grant No. IP2012 017172, as well as by the People Programme (Marie Curie Actions) of the European Union's Seventh Framework Programme (FP7/2007-2013) under REA Grant Agreement No. 291734. J.K. acknowledges hospitality of the Leibniz Universität in Hannover where a large part of the work was performed.
Volume
94
Issue
8
Article Number
085152
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Cite this

Kaczmarczyk J, Schickling T, Bünemann J. Coexistence of nematic order and superconductivity in the Hubbard model. Physical Review B - Condensed Matter and Materials Physics. 2016;94(8). doi:10.1103/PhysRevB.94.085152
Kaczmarczyk, J., Schickling, T., & Bünemann, J. (2016). Coexistence of nematic order and superconductivity in the Hubbard model. Physical Review B - Condensed Matter and Materials Physics, 94(8). https://doi.org/10.1103/PhysRevB.94.085152
Kaczmarczyk, Jan, Tobias Schickling, and Jörg Bünemann. “Coexistence of Nematic Order and Superconductivity in the Hubbard Model.” Physical Review B - Condensed Matter and Materials Physics 94, no. 8 (2016). https://doi.org/10.1103/PhysRevB.94.085152.
J. Kaczmarczyk, T. Schickling, and J. Bünemann, “Coexistence of nematic order and superconductivity in the Hubbard model,” Physical Review B - Condensed Matter and Materials Physics, vol. 94, no. 8, 2016.
Kaczmarczyk J, Schickling T, Bünemann J. 2016. Coexistence of nematic order and superconductivity in the Hubbard model. Physical Review B - Condensed Matter and Materials Physics. 94(8).
Kaczmarczyk, Jan, et al. “Coexistence of Nematic Order and Superconductivity in the Hubbard Model.” Physical Review B - Condensed Matter and Materials Physics, vol. 94, no. 8, 085152, American Physical Society, 2016, doi:10.1103/PhysRevB.94.085152.

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