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.

Topologically non-trivial gap function and topology-induced time-reversal symmetry breaking in a superconductor with singular dynamical interaction

This paper demonstrates that adding a repulsive Hubbard-type interaction with a finite cutoff to a model with singular dynamical interactions can stabilize a topologically non-trivial superconducting state, which emerges from the topologically trivial ground state via an intermediate phase characterized by topology-induced time-reversal symmetry breaking.

Yue Yu, Andrey V. Chubukov2026-04-17🔬 cond-mat

Revisiting apparent ideal diamagnetism at ambient conditions in graphene-n-heptane-permalloy systems

This paper retracts the authors' previous claim of ideal diamagnetism in graphene-n-heptane-permalloy systems, attributing the observed signals instead to magnetic field redistribution artifacts caused by permalloy inhomogeneities and experimental geometry.

Rajendra Dulal, Serafim Teknowijoyo, Sara Chahid, Vahan Nikoghosyan, Armen Gulian2026-04-17🔬 cond-mat

Direct laser micromachining of superconducting terahertz Josephson plasma emitters

This paper demonstrates a rapid, maskless fabrication method for superconducting terahertz Josephson plasma emitters using direct UV laser micromachining of Bi-2212 single crystals, which preserves internal junction stacks to enable stable, elliptically polarized radiation while offering a versatile and low-cost alternative to traditional techniques.

Reo Yamaguchi, Takuma Sakurai, Kazuhiro Yamaki, Akinobu Irie, Junichiro Kato, Taichiro Nishio, Shigeyuki Ishida, Hiroshi Eisaki, Manabu Tsujimoto2026-04-17🔬 physics.app-ph

Fermi-liquid versus non-Fermi-liquid/'strange-metal' fits to the electrical resistivity in the quantum critical magnetic regime of an unconventional superconductor

This study analyzes electrical resistivity in high-quality UTe $_2$ samples under high magnetic fields and finds that apparent non-Fermi-liquid behavior is likely an artifact of fitting data with unphysical parameters, suggesting that a hidden Fermi-liquid regime may actually exist beneath the superconducting phase.

W. Knafo, T. Thebault, K. Somesh, G. Lapertot, G. Knebel, D. Braithwaite, D. Aoki2026-04-17🔬 cond-mat

Type II Lifshitz invariant and optically active Higgs mode in time-reversal symmetry broken superconductors

This paper introduces a "type II" Lifshitz invariant unique to time-reversal symmetry-broken superconductors, which enables the Higgs mode to become optically active and provides a comprehensive group-theoretical classification and numerical verification of this phenomenon.

Raigo Nagashima, Chihiro Mamiya, Naoto Tsuji2026-04-17🔬 cond-mat

Quantum fluctuations and the emergence of in-gap Higgs mode in superconductors

This paper demonstrates that including quantum fluctuations in the theoretical description of $s$ -wave superconductors shifts the Higgs mode's frequency below the superconducting gap, creating a new undamped pole that results in sharper experimental signatures in Third Harmonic Generation and Raman scattering while explaining potential discrepancies in gap measurements across different techniques.

Sida Tian, Naoto Tsuji, Dirk Manske2026-04-17🔬 cond-mat

Abrikosov vortices in altermagnetic superconductors

This paper demonstrates that in altermagnetic superconductors, the coupling between the external magnetic field and the Néel vector induces an effective mass anisotropy that transforms circular Abrikosov vortices into field-direction-dependent elliptical vortices, resulting in nonreciprocal magnetization curves due to distinct vortex-vortex interaction energies.

A. A. Mazanik, F. S. Bergeret2026-04-17🔬 cond-mat

Improvement of the Simmons model for tunnel junctions

This paper presents an improved analytical model for metallic tunnel junctions that offers greater accuracy than the traditional Simmons model by deriving new formulas for tunneling current and conductance at finite voltage and temperature, which align more closely with the Wentzel-Kramers-Brillouin approximation and demonstrate significant practical differences when fitted to experimental data.

Ilmo Räisänen, Ilari Maasilta2026-04-16🔬 cond-mat.mes-hall

High efficiency superconducting diode effect in a gate-tunable double-loop SQUID

This paper demonstrates a gate-tunable double-loop SQUID that achieves a superconducting diode efficiency exceeding 50% by independently controlling the harmonic content and amplitude of three interfering current-phase relationships through series Josephson junctions.

Wyatt Gibbons, Teng Zhang, Kevin Barrow, Tyler Lindemann, Jukka I. Väyrynen, Michael J. Manfra2026-04-16🔬 cond-mat

Superconductivity near two-dimensional Van Hove singularities: a determinant quantum Monte Carlo study

Using determinant quantum Monte Carlo simulations, this study reveals that while superconducting transition temperatures are modestly enhanced near Van Hove singularities in the weak-coupling regime, the global maximum $T_c$ for the two-dimensional attractive Hubbard model actually occurs at intermediate interaction strengths and electron densities unrelated to the non-interacting density of states features.

Gustav Romare, Daniel Shaffer, Alex Levchenko, Edwin Huang, Ilya Esterlis2026-04-16🔬 cond-mat

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