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.

Revealing domain wall stability during ultrafast demagnetization

Using ultrafast sub-wavelength extreme ultraviolet imaging, researchers demonstrated that magnetic domain walls in ferro- and ferrimagnetic thin films remain remarkably stable in position, shape, and width even during up to 50% ultrafast demagnetization, revealing the localized nature of photoinduced demagnetization and offering new insights for all-optical magnetic control.

Hung-Tzu Chang, Sergey Zayko, Timo Schmidt, Ofer Kfir, Murat Sivis, Johan H. Mentink, Manfred Albrecht, Claus Ropers2026-04-21🔬 cond-mat.mes-hall

Observation of average topological phase in disordered Rydberg atom array

This study reports the first experimental observation of disorder-induced average symmetry-protected topological (SPT) phases in a disordered Rydberg atom array, confirming the existence of topologically protected edge modes and ground state degeneracy through spatially resolved correlation functions and quench dynamics.

Zongpei Yue, Yu-Feng Mao, Xinhui Liang, Zhen-Xing Hua, Peiyun Ge, Yu-Xin Chao, Kai Li, Chen Jia, Meng Khoon Tey, Yong Xu, Li You2026-04-21🔬 cond-mat.mes-hall

Finite-Size Effects in Quantum Metrology at Strong Coupling: Microscopic vs Phenomenological Approaches

This paper demonstrates that accounting for finite-size effects through a microscopic polaron transform is essential for accurately determining quantum Fisher information in strongly coupled spin chains, revealing that phenomenological approaches fail to capture the true metrological potential for low-temperature thermometry and anisotropy-controlled magnetometry.

Ali Pedram, Özgür E. Müstecaplıo\u{g}lu2026-04-21🔬 cond-mat.mes-hall

Exchange Interactions of a Wigner Crystal in a Magnetic Field and Berry Curvature: Multi-Particle Tunneling through Complex Trajectories

This paper employs a semi-classical large-rsr_s expansion to demonstrate how out-of-plane magnetic fields and Berry curvature modify Wigner crystal exchange interactions through Aharonov-Bohm and Berry phases acquired during multi-particle tunneling along complex trajectories in coordinate and momentum space, respectively, with potential applications to rhombohedral multilayer graphene.

Kyung-Su Kim2026-04-21🔬 cond-mat.mes-hall

Revisiting the adiabatic limit in ballistic multiterminal Josephson junctions

Motivated by recent experiments on multiterminal Josephson junctions, this paper proposes a model for the intermediate bias regime that treats the central normal metal as a continuum with nonequilibrium electronic populations, predicting characteristic voltage scales that govern mesoscopic critical current oscillations and bridge interpretations across quartet, topological, and Floquet physics.

Régis Mélin, Asmaul Smitha Rashid, Romain Danneau, Morteza Kayyalha2026-04-21🔬 cond-mat.mes-hall

Magnetotransport across Weyl semimetal grain boundaries

This paper demonstrates that the universal linear tunnel magnetoconductance across Weyl semimetal grain boundaries remains robust against interface disorder, with its slope transitioning from a topological value determined by Fermi arcs at high magnetic fields to a geometric value based on Weyl-node pair counts at low fields, thereby explaining the observed robustness of negative linear magnetoresistance in grained Weyl semimetals.

Haoyang Tian, Vatsal Dwivedi, Adam Yanis Chaou, Maxim Breitkreiz2026-04-21🔬 cond-mat.mes-hall