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Normal Fermi Surface in the Nodal Superconductor CeCoIn 5 Revealed via Thermal Conductivity
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Diverse Manifestations of Electron-Phonon Coupling in a Kagome Superconductor
Recent angle-resolved photoemission spectroscopy (ARPES) experiments on the kagome metal CsV_{3}Sb_{5} revealed distinct multimodal dispersion kinks and nodeless superconducting gaps across multiple electron bands. The prominent photoemission kinks suggest a definitive coupling between electrons and certain collective modes, yet the precise nature of this interaction and its connection to superconductivity remain to be established. Here, employing the state-of-the-art ab initio many-body perturbation theory computation, we present direct evidence that electron-phonon (e-ph) coupling induces the multimodal photoemission kinks in CsV_{3}Sb_{5}, and profoundly, drives the nodeless s-wave superconductivity, showcasing the diverse manifestations of the e-ph coupling. Our calculations well capture the experimentally measured kinks and their fine structures, and reveal that vibrations from different atomic species dictate the multimodal behavior. Results from anisotropic GW-Eliashberg equations predict a phonon-mediated superconductivity with nodeless s-wave gaps, in excellent agreement with various ARPES and scanning tunneling spectroscopy measurements. Despite the universal origin of the e-ph coupling, the contributions of several characteristic phonon vibrations vary in different phenomena, highlighting a versatile role of e-ph coupling in shaping the low-energy excitations of kagome metals.
Quasiclassical circuit theory of contiguous disordered multiband superconductors
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Pairing symmetry and topological surface state in iron-chalcogenide superconductors
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Collective modes and terahertz near-field response of superconductors
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Zero-bias conductance peak in Dirac semimetal-superconductor devices
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Incommensurate two-dimensional checkerboard charge density wave in the low-dimensional superconductor Ta 4 Pd 3 Te 16
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Surface orbital order and chemical potential inhomogeneity of the iron-based superconductor Fe Te 0.55 Se 0.45 investigated with special STM tips
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Stronger quantum fluctuation with larger spins: Emergent magnetism in the pressurized high-temperature superconductor FeSe
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Higgs-Mediated Optical Amplification in a Nonequilibrium Superconductor
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Magnetism and Spin-Orbit Coupling in Iron Chalcogenide Superconductors
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Superconductor Electronics and the International Roadmap for Devices and Systems.
Abstract not provided.