cond-mat.mes-hall papers

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

Metastable states of 2D-material-on-metal-islands structures revealed by thermal cycling

This study reveals that thermal cycling induces irreversible degradation in the van der Waals bonding and electronic transport of hBN/graphene heterostructures on metallic islands due to thermal-expansion-driven delamination and interfacial residue redistribution, while demonstrating that hot pressing can restore contact and highlighting the critical role of interfacial stability in 2D device applications.

V. A. Ievleva, V. A. Prudkoglyad, L. A. Morgun, A. Yu. Kuntsevich2026-03-10

🔬 mesoscale physics

Exciton Berryology

This paper establishes a gauge-invariant framework for defining unique electron and hole exciton Berry phases via a projected position operator, enabling the numerical calculation of exciton polarization and the characterization of topologically distinct exciton bands, including shift excitons, through crystalline inversion and $C_2\mathcal{T}$ symmetries.

Henry Davenport, Johannes Knolle, Frank Schindler2026-03-10

🔬 mesoscale physics

Interaction-driven flat band and charge order in Fe5GeTe2

This study demonstrates that in the van der Waals magnet Fe5GeTe2, strong electronic correlations drive the formation of a flat band at the Fermi level, which in turn induces a $\sqrt{3}\times\sqrt{3}\,R30^\circ$ charge order, establishing a paradigm where interaction-driven flat bands promote large-scale electronic ordering.

Qiang Gao, Gabriele Berruto, Khanh Duy Nguyen, Chaowei Hu, Paul Malinowski, Haoran Lin, Beomjoon Goh, Bo Gyu Jang, Xiaod (…)2026-03-10

🔬 mesoscale physics

Berry Curvature of Low-Energy Excitons in Rhombohedral Graphene

This paper introduces an improved low-energy two-band model for rhombohedral pentalayer graphene to demonstrate that excitons possess electrically tunable, quantized Wannier function centers and inherit Berry curvature, establishing the material as a versatile platform for exploring excitonic topology and edge modes in moiré systems.

Henry Davenport, Frank Schindler, Johannes Knolle2026-03-10

⚛️ quantum physics

Non-Hermitian quantum geometric tensor and nonlinear electrical response

This paper demonstrates that the complex-valued non-Hermitian quantum geometric tensor governs intrinsic nonlinear electrical responses in gapped systems, revealing a unique transport mechanism where finite wavepacket width fundamentally alters conductivity—a phenomenon strictly absent in Hermitian systems.

Kai Chen, Jie Zhu2026-03-10

⚛️ quantum physics

Beyond the non-Hermitian skin effect: scaling-controlled topology from Exceptional-Bound Bands

This paper introduces a novel mechanism called exceptional-bound (EB) band engineering that enables system-size-controlled topological transitions in non-Hermitian systems through unique critical scaling near exceptional points, distinct from the non-Hermitian skin effect and applicable to diverse experimental platforms.

Mengjie Yang, Ching Hua Lee2026-03-10

🔬 mesoscale physics

Stability bounds for the generalized Kadanoff-Baym ansatz in the Holstein dimer

This paper establishes practical stability bounds for the Generalized Kadanoff-Baym Ansatz (GKBA) in electron-phonon dynamics by identifying parameter regions where the method fails in a Holstein dimer model and demonstrating that coupling to electronic leads can mitigate these instabilities.

O. Moreno Segura, Y. Pavlyukh, R. Tuovinen2026-03-10

🔬 mesoscale physics

Spin Polarization from Circularly Polarized Light Induced Charge Transfer

This paper demonstrates that circularly polarized light can induce spin polarization in an achiral metalloporphyrin complex by selectively exciting ring currents to break spin degeneracy, with the resulting transient polarization depending on spin-orbit coupling and Jahn-Teller dephasing rates.

Sindhana Pannir-Sivajothi, David T. Limmer2026-03-10

🔬 mesoscale physics

Exchange-dominated frequency shift of spin-wave nonreciprocal dispersion relation in planar magnetic multilayers

This paper demonstrates that in planar magnetic multilayers without Dzyaloshinskii-Moriya interaction, interlayer exchange interactions, rather than dipolar effects, are the dominant mechanism driving the frequency shift of nonreciprocal spin-wave dispersion when counterpropagating modes exhibit distinct geometric structures along the thickness.

Claudia Negrete (Departamento de Física, Universidad Católica del Norte, Avenida Angamos, Antofagasta, Chile), Attila Ká (…)2026-03-10

🔬 mesoscale physics

Straintronics and twistronics in bilayer graphene

This paper presents a global method for constructing commensurate supercells in twisted and strained bilayer graphene, revealing that shear strain significantly enhances band narrowing and drives topological transitions, thereby establishing a tunable platform for flat-band and correlated phenomena beyond the magic angle.

Federico Escudero, Dong Wang, Pierre A. Pantaleón, Shengjun Yuan, Francisco Guinea, Zhen Zhan2026-03-10

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