cond-mat.supr-con 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.

FerBo: a noise resilient qubit hybridizing Andreev and fluxonium states

The paper proposes "FerBo," a novel superconducting qubit that achieves robustness against both relaxation and dephasing by hybridizing fermionic Andreev levels with a bosonic LC circuit mode while leveraging phase-space wavefunction delocalization similar to fluxonium.

J. J. Caceres, D. Sanz Marco, J. Ortuzar, E. Flurin, C. Urbina, H. Pothier, M. F. Goffman, F. J. Matute-Cañadas, A. Levy Yeyati2026-04-02🔬 cond-mat.mes-hall

Electronic structure and correlation of La $_4$ Co $_2$ NiO $_8$ Cl $_2$ : a theoretical proposal for a La $_4$ Ni $_3$ O $_{10}$ -like high-temperature superconductor

This paper theoretically proposes and investigates the Co-based compound La $_4$ Co $_2$ NiO $_8$ Cl $_2$ as a potential high-temperature superconductor, demonstrating via DFT+DMFT calculations that its electron-doped, high-pressure trilayer structure and strongly correlated electronic properties closely resemble those of the recently discovered superconducting nickelate La $_4$ Ni $_3$ O $_{10}$ .

Si-Yong Jia, Jing-Xuan Wang, Jian-Hong She, Rong-Qiang He, Zhong-Yi Lu2026-04-02🔬 cond-mat

Stability of the Fulde-Ferrell-Larkin-Ovchinnikov states in anisotropic systems and critical behavior at thermal $m$ -axial Lifshitz points

This paper argues that long-range ordered Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) states are unstable to thermal fluctuations in two-dimensional isotropic systems but may persist in three dimensions, while proposing a nonperturbative renormalization group method to compute critical exponents at thermal $m$ -axial Lifshitz points and highlighting the potential for robust quantum Lifshitz points in imbalanced Fermi mixtures.

Piotr Zdybel, Mateusz Homenda, Andrzej Chlebicki, Pawel Jakubczyk2026-04-01⚛️ quant-ph

Superconductivity and Electron Correlations in Kagome Metal LuOs3B2

This study reports the discovery of bulk type-II superconductivity with a critical temperature of 4.63 K in the ideal kagome metal LuOs3B2, characterizing its moderately coupled electron-phonon mechanism, enhanced electron correlations, and unique kagome band features such as Dirac points and van Hove singularities through combined experimental measurements and first-principles calculations.

Yusen Xiao, Qingchen Duan, Tao Jia, Yajing Cui, Shaohua Liu, Zhiwei Wen, Liangwen Ji, Ruidan Zhong, Yongliang Chen, Yong Zhao2026-04-01🔬 cond-mat

Measuring Reactive-Load Impedance with Transmission-Line Resonators Beyond the Perturbative Limit

This paper presents an analytic framework that extends the measurement of reactive-load impedance in superconducting transmission-line resonators beyond the perturbative limit, enabling the precise extraction of material properties like the dielectric constant and loss tangent of hexagonal boron nitride without relying on full-wave simulations.

Xuanjing Chu, Jinho Park, Jesse Balgley, Sean Clemons, Ted S. Chung, Kenji Watanabe, Takashi Taniguchi, Leonardo Ranzani, Martin V. Gustafsson, Kin Chung Fong, James Hone2026-04-01🔬 physics.app-ph

Effect of doping on the electronic structure, orbital-dependent renormalizations, and magnetic correlations in bilayer La $_3$ Ni $_2$ O $_7$

Using DFT+DMFT calculations, this study reveals that doping in bilayer La $_3$ Ni $_2$ O $_7$ induces significant orbital-dependent renormalizations, a Lifshitz transition, and enhanced spin-charge stripe fluctuations, suggesting these correlations are central to its pressure-driven superconductivity.

I. V. Leonov2026-04-01🔬 cond-mat

The role of the apical oxygen in cuprate high-temperature superconductors

By combining density-functional theory and cluster dynamical mean-field theory, this study demonstrates that while apical oxygen displacement modulates the superconducting order parameter in cuprates, this effect is primarily driven by changes in effective hole doping rather than the charge-transfer gap, urging caution in interpreting correlations between $T_c$ and apical oxygen distance across different compounds.

Samuel Vadnais, Rémi Duchesne, Kristjan Haule, A. -M. S. Tremblay, David Sénéchal, Benjamin Bacq-Labreuil2026-04-01🔬 cond-mat

Disorder-Driven Enhancement of Coulomb Repulsion Governs The Superconducting Dome in Ionic-Liquid-Gated Quasi-2D Materials

This paper demonstrates that in ionic-liquid-gated quasi-2D materials, disorder from frozen ionic liquids enhances Coulomb repulsion and suppresses the critical temperature, thereby naturally generating the superconducting dome observed in the phase diagram.

Giovanni Marini, Pierluigi Cudazzo, Matteo Calandra2026-04-01🔬 cond-mat

Oxide-nitride heteroepitaxy for low-loss dielectrics in superconducting quantum circuits

This paper demonstrates that heteroepitaxial $\gamma$ -Al $_2$ O $_3$ grown on TiN via pulsed laser deposition forms a high-quality, single-crystal dielectric with an intrinsically low two-level system loss of $(2.8 \pm 0.1) \times 10^{-5}$ , establishing it as a promising materials platform for reducing dielectric losses in superconducting quantum circuits.

David A. Garcia-Wetten, Mitchell J. Walker, Peter G. Lim, André Vallières, Maria G. Jimenez-Guillermo, Miguel A. Alvarado, Dominic P. Goronzy, Anna Grassellino, Jens Koch, Vinayak P. Dravid, Mark (…)2026-04-01⚛️ quant-ph

Altermagnetic-doping interplay as a route to enhanced d-wave pairing in the Hubbard model

This paper demonstrates that doping altermagnets within the Hubbard model suppresses long-range antiferromagnetism while preserving strong short-range spin fluctuations, thereby robustly stabilizing and enhancing unconventional superconductivity through a synergistic d-wave and p-wave mixed-pairing state that could lead to higher transition temperatures.

Ji Liu, Jianyu Li, Peng Zhang, Xiaosen Yang, Ho-Kin Tang2026-04-01🔬 cond-mat

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