Universality of sublattice-modulated superconductivity
ORAL
Abstract
Supported by recent high-resolution STM studies in kagome materials and iron-based superconductors [1-3], we introduce the concept of sublattice-modulated superconductivity (SMS) as a fundamental underlying principle. An SMS features spatial modulations of the superconducting order parameter that are commensurate with the Bravais lattice constant and, therefore, does not involve the breaking of translational symmetry [4]. While SMS bears similarities to pair-density waves, it cannot be classified as such due to a distinct type of spatial symmetry breaking.
In this talk, I will elaborate on this distinction, examine the mechanism driving SMS formation, and relate our findings to the aforementioned experimental observations.
[1] H. Deng et al., Chiral kagome superconductivity modulations with residual Fermi arcs, Nature 632, 775–781 (2024)
[2] L. Kong et al., Observation of Cooper-pair density modulation state, arXiv:2404.10046 (2024)
[3] T. Wei et al., Observation of intra-unit-cell superconductivity modulation, arXiv:2404.16683 (2024)
[4] T. Schwemmer et al., Sublattice modulated superconductivity in the kagome Hubbard model, Phys. Rev. B 110, 024501 (2024)
In this talk, I will elaborate on this distinction, examine the mechanism driving SMS formation, and relate our findings to the aforementioned experimental observations.
[1] H. Deng et al., Chiral kagome superconductivity modulations with residual Fermi arcs, Nature 632, 775–781 (2024)
[2] L. Kong et al., Observation of Cooper-pair density modulation state, arXiv:2404.10046 (2024)
[3] T. Wei et al., Observation of intra-unit-cell superconductivity modulation, arXiv:2404.16683 (2024)
[4] T. Schwemmer et al., Sublattice modulated superconductivity in the kagome Hubbard model, Phys. Rev. B 110, 024501 (2024)
*The work is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through Project-ID 258499086 - SFB 1170 and through the Würzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter - ct.qmat Project-ID 390858490 - EXC 2147.
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Publication: T. Schwemmer et al., Sublattice modulated superconductivity in the kagome Hubbard model, Phys. Rev. B 110, 024501 (2024)
H. Deng et al., Chiral kagome superconductivity modulations with residual Fermi arcs, Nature 632, 775–781 (2024)
H. Hohmann et al., Universality of sublattice modulated superconductivity, (in preparation)
Presenters
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Hendrik Hohmann
- Julius-Maximilians University of Wuerzburg