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Anomalous Temperature Dependence of Quantum-Geometric Superfluid Weight

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arxiv 2505.13065 v1 pith:5D535TMC submitted 2025-05-19 cond-mat.supr-con

classification cond-mat.supr-con
keywords dependencesuperfluidsymmetrytemperatureweightconventionalgeometryquantum
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The symmetry of Cooper pairs encodes key information about superconductivity and has been widely studied through the temperature dependence of the superfluid weight. However, in systems dominated by quantum geometry, conventional theories miss its essential properties. We study the temperature dependence of the quantum-geometric superfluid weight and classify the relationship to the superconducting symmetry and band structures. The obtained power laws are different from conventional behavior, and unconventional superconductivity in twisted multilayer graphene is discussed. Our findings provide insights into the superconducting symmetry and the pairing mechanism via quantum geometry.

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  1. Quantum Geometric Injection and Shift Optical Forces Drive Coherent Phonons

    cond-mat.mes-hall 2025-07 conditional novelty 7.0 of 10

    The paper derives quantum-geometric injection and shift Raman forces, shows the shift force emerges impulsively when time-reversal symmetry is broken, and demonstrates strong tunability in the bilayer Haldane model.

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