757 papers
Superconductivity is a fascinating state of matter where materials conduct electricity without any resistance, often defying our everyday expectations of how energy behaves. Researchers in this field explore the quantum mechanics behind these phenomena, seeking new materials that can operate at higher temperatures or under more practical conditions. This work holds the promise of revolutionizing everything from power grids to medical imaging devices, making the invisible world of quantum physics feel increasingly tangible and useful.
At Gist.Science, we monitor the arXiv database continuously to bring you the very latest preprints in Cond-Mat — Supr-Con as soon as they are posted. For every new submission, we generate both detailed technical summaries for experts and clear, plain-language explanations for curious readers, ensuring that cutting-edge discoveries are accessible to everyone regardless of their background. Below are the latest papers in this dynamic field, ready for you to explore.
Motivated by recent scanning tunneling experiments, this paper proposes a microscopic theory identifying an intra-valley, finite-momentum Kekulé pair-density wave (PDW) as the mechanism for unconventional superconductivity in twisted magic-angle bilayer graphene, a state characterized by spontaneous symmetry breaking, triplet pairing, and a BEC-like regime consistent with experimental signatures.
This paper clarifies subtle aspects of coherent-state path integrals in quantum thermodynamics, demonstrating that when properly handled in the continuum limit, they yield results consistent with the canonical Hamiltonian approach across various paradigmatic bosonic and fermionic systems.
This paper proposes and numerically validates, via DMRG simulations of a bilayer Hubbard model, that doping a featureless Mott insulator with $SU(4)$ symmetry provides a natural platform for realizing a primary charge- superconducting phase at zero temperature, distinct from the conventional charge- state found in its $Sp(4)$ counterpart.
This paper investigates the analytical properties and presents an efficient Galerkin-based numerical solution using B-splines for the Bardeen-Cooper-Schrieffer equation describing unconventional superconductors with long-range power-law interactions on a -dimensional lattice, with specific results demonstrated for a nodal superconductor on a two-dimensional square lattice.
By combining density-functional theory with symmetry-constrained modeling, this study reveals that strain-stabilized two-dimensional IrTe hosts a unique multichannel superconducting state where band-selective Rashba and Ising spin-singlet pairings coexist without mixing due to distinct symmetry constraints, despite the material's global inversion symmetry.
The paper proposes and demonstrates through calculations on a bilayer superconductor that the superconducting diode efficiency can be significantly enhanced near a BCS-FFLO phase transition by exploiting current-induced switching between superconducting orders, thereby offering a new method to probe the nature of this transition.
This paper demonstrates that while a variational Ansatz accurately predicts the energy and effective mass of a one-dimensional Fermi polaron, it fails qualitatively in the thermodynamic limit by incorrectly predicting a finite quasi-particle residue and zero charge, whereas exact methods reveal a vanishing residue consistent with Luttinger-liquid physics and a charge that grows from zero to one with increasing coupling.
This study reveals that electropolishing, despite producing visually smooth niobium surfaces, introduces microscopic sloped-step defects at grain boundaries that enhance magnetic fields and suppress the superheating limit, thereby compromising the performance of superconducting RF cavities and influencing the efficacy of subsequent impurity-based heat treatments.
This study reports the discovery of ambient-pressure superconductivity in bilayer nickelate films grown on LaAlO3 (001) substrates, which achieve the necessary state with nearly half the compressive strain (-1.2%) previously required on SrLaAlO4 (001), thereby offering a new platform to systematically investigate the superconducting phase diagram and ground state.
This study demonstrates that high-pressure synthesis significantly extends the fluorine substitution range and enhances the superconducting performance of SmFeAsO1-xFx bulk samples, achieving a maximum critical temperature of 57 K and a critical current density of 10^4 A cm^-2 while establishing a dome-shaped phase diagram.