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.

Extended Mean-Field Theory for the 2D Hubbard Model in Degenerate Dilute Electron Gases: Fluctuations, Superconducting Dome, and Interaction Mechanisms in Strontium Titanate

This paper presents an extended mean-field theory for the 2D Hubbard model in strontium titanate that successfully reproduces the experimental superconducting dome, elucidates the competition between charge-density-wave and superconducting orders, and provides criteria to distinguish electron-electron from electron-phonon interaction mechanisms in dilute electron gases.

Xing Yang, Xinyu Zhang, Xuchang Zhang2026-02-23🔬 cond-mat.mtrl-sci

Doping-induced evolution of the intrinsic hump and dip energies dependent on the sample fabrication conditions in Bi $_2$ Sr $_2$ CaCu $_2$ O $_{8+δ}$

This study demonstrates that the doping-dependent evolution of hump and dip energies in Bi $_2$ Sr $_2$ CaCu $_2$ O $_{8+\delta}$ is highly sensitive to sample fabrication conditions, revealing that measurements taken under optimal ultra-high vacuum and low-temperature conditions reflect intrinsic bulk properties, whereas those obtained under deteriorated conditions are artifacts of degraded surface properties.

Tatsuya Honma2026-02-20🔬 cond-mat

Microscopic Investigation of rf Vortex Nucleation in Nb3Sn Films Using a Near-Field Magnetic Microwave Microscope

Using a near-field magnetic microwave microscope to measure third-harmonic responses, researchers compared rf vortex nucleation in two Nb3Sn films and found that while both exhibit defect-triggered nucleation below 7 K, the electrochemically plated film uniquely displays additional structures between 14 K and 16 K, highlighting how fabrication methods influence vortex penetration properties.

Chung-Yang Wang, Zeming Sun, Thomas Oseroff, Matthias U. Liepe, Steven M. Anlage2026-02-20🔬 cond-mat

Coexisting electronic smectic liquid crystal and superconductivity in a Si square-net semimetal

This study utilizes scanning tunneling microscopy and numerical calculations to reveal the coexistence of short-ranged charge stripe (smectic) order and superconductivity in the Si square-net semimetal NaAlSi, attributing the intertwined phases to kinetic energy suppression on specific p-orbital hole pockets of the Fermi surface.

Christopher J. Butler, Toshiya Ikenobe, Ming-Chun Jiang, Daigorou Hirai, Takahiro Yamada, Guang-Yu Guo, Ryotaro Arita, Tetsuo Hanaguri, Zenji Hiroi2026-02-20🔬 cond-mat.mtrl-sci

$p$ -wave magnet driven field-free Josephson diode effect

This paper proposes a Josephson junction architecture combining a $p$ -wave magnet and an altermagnet barrier to achieve a robust, field-free Josephson diode effect without requiring Rashba spin-orbit coupling or distinct superconductors, thereby offering a promising platform for quantum circuit applications.

Lovy Sharma, Bimal Ghimire, Manisha Thakurathi2026-02-20🔬 cond-mat.mes-hall

BaFe2Se3 a quasi-unidimensional non-centrosymmetric superconductor

By integrating high-resolution X-ray diffraction, infrared spectroscopy, and ab initio calculations, this study reveals that the high-pressure superconducting phase of BaFe2Se3 adopts a non-centrosymmetric polar space group (P2_1), revising previous structural assignments and offering new insights into the interplay between lattice symmetry and unconventional superconductivity in iron-based materials.

S. Deng, A. Roll, W. G. Zheng, T. Vasina, D. Bounoua, P. Fertey, M. Verseils, C. Bellin, A. Forget, D. Colson, M. B. Lepetit, P. Foury-Leylekian, V. Balédent2026-02-20🔬 cond-mat

Power attenuation in millimeter-wave and terahertz superconducting rectangular waveguides: linear response, TLS loss, and Higgs-mode nonlinearity

This paper establishes a comprehensive microscopic framework to evaluate power attenuation in superconducting rectangular waveguides across the millimeter-wave to terahertz range, revealing that high-purity materials in the clean limit minimize linear losses while native oxide TLS effects dominate at ultra-low temperatures and strong excitation induces a distinct Higgs-mode dissipation peak near the superconducting gap frequency.

Takayuki Kubo2026-02-20⚛️ quant-ph

High-temperature $η$ -pairing superconductivity in the photodoped Hubbard model

Using steady-state dynamical mean-field theory on the real-frequency axis, this study demonstrates that photodoping a Mott insulating Hubbard model induces a distinct form of high-temperature $\eta$ -pairing superconductivity, characterized by a high effective critical temperature and identifiable spectroscopic signatures in the spectral function and optical conductivity.

Lei Geng, Aaram J. Kim, Philipp Werner2026-02-20🔬 cond-mat

Orbital current signature using neutron diffraction

This paper reviews the detection of orbital loop currents in various correlated electron materials via polarized neutron diffraction over the past two decades and presents an alternative theoretical description of the neutron magnetic cross-section based on microscopic inter-orbital currents rather than point-like local magnetic moments.

Dalila Bounoua, William Liège, Yvan Sidis, Philippe Bourges2026-02-20🔬 cond-mat

Anomalous Superfluid Density in Pair-Density-Wave Superconductors

This paper reveals that pure Pair-Density-Wave (PDW) superconductors exhibit a large region of intrinsic instability characterized by negative superfluid density, while the remaining stable regime displays unique, experimentally observable signatures that suggest significant challenges for the formation of stable, finite-temperature PDW states.

Ke Wang, Qijin Chen, Rufus Boyack, K. Levin2026-02-19🔬 cond-mat

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