Explore the fascinating intersection where quantum materials meet the complexity of everyday environments in the Cond-Mat — Mes-Hall section. This field investigates how tiny particles behave when caught between the orderly world of single atoms and the chaotic nature of bulk matter, revealing the hidden rules that govern electricity, magnetism, and heat in novel substances.

Gist.Science brings these cutting-edge discoveries to you directly from arXiv, the leading repository for physics preprints. We process every new submission in this category as soon as it appears, offering both straightforward, plain-language explanations and deep technical summaries to help researchers and curious minds alike grasp the latest breakthroughs without getting lost in dense equations.

Below are the most recent papers in this dynamic area of condensed matter physics, ready for you to explore.

🔬 mesoscale physics

Compact self-matched gyrators using edge magnetoplasmons

This paper demonstrates a compact, self-impedance matched gyrator based on edge magnetoplasmons in a GaAs 2D gas that achieves nearly lossless, unidirectional microwave transmission from 0.2 to 2 GHz without external matching networks, offering a footprint 100 times smaller and significantly lower loss than existing commercial and plasmonic devices.

Aldo Tarascio, Yiqi Zhao, Rafael S. Eggli, Taras Patlatiuk, Christian Reichl, Werner Wegscheider, Stefano Bosco, Dominik (…)2026-04-03
🔬 mesoscale physics

Codimension-controlled universality of quantum Fisher information singularities at topological band-touching defects

This paper establishes that the singular behavior of quantum Fisher information near topological band-touching defects follows a universal power-law scaling determined solely by the defect's codimension, thereby unifying diverse topological phase transitions into a single geometric framework independent of spatial dimensionality or specific band structures.

C. A. S. Almeida2026-04-03
🔬 mesoscale physics

Coupled dynamical Boltzmann transport equations with long-range electron-phonon and electron-electron interactions in 2D materials

This paper presents a general theoretical framework of coupled dynamical Boltzmann transport equations to demonstrate that dynamical screening effects are fundamental for accurately describing electronic transport in electrostatically doped 2D semiconductors, particularly regarding scattering from long-range electron-phonon and electron-electron interactions.

Francesco Macheda, Thibault Sohier2026-04-03
🔬 mesoscale physics

Quantum anomalous Hall conductivity in altermagnets under applied magnetic field

This paper demonstrates that applying an external magnetic field to a two-dimensional dd-wave altermagnet on a Lieb lattice breaks valley rotational symmetry to induce a controllable quantum anomalous Hall effect with total Chern numbers of ±1\pm1, distinguishing it from conventional ferro-valleytronic and quantum spin Hall systems.

Meysam Bagheri Tagani, Amar Fakhredine, Carmine Autieri2026-04-03
⚛️ high-energy theory

Effective Field Theory for Superconducting Phase Transitions

This paper employs the Schwinger-Keldysh formalism to construct a symmetry-constrained effective field theory for s-wave superconducting phase transitions that reproduces Ginzburg-Landau equations, describes overdamped Higgs and absorbed phase modes near the critical point, and validates its structure and coefficients using holographic techniques to reveal complex relaxation dynamics characteristic of strongly coupled systems.

Yanyan Bu, Zexin Yang2026-04-03