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.

Interband optical conductivities in two-dimensional tilted Dirac bands revisited within the tight-binding model

This paper theoretically investigates interband optical conductivities in two-dimensional tilted Dirac bands using a tight-binding model, revealing three characteristic critical frequencies absent in linearized models that arise from high-symmetry points and Brillouin zone boundaries, thereby offering robust predictions for future experimental studies.

Chao-Yang Tan, Jian-Tong Hou, Xin Chen, Ling-Zhi Bai, Jie Lu, Yong-Hong Zhao, Chang-Xu Yan, Hao-Ran Chang, Hong Guo2026-04-08🔬 cond-mat.mes-hall

Optically induced thermal demagnetization and switching of antiferromagnetic domains in NiO and CoO thin films

This study demonstrates that all-optical thermal manipulation using laser pulses can induce demagnetization, controlled domain wall motion, and reversible 90° switching of antiferromagnetic domains in NiO/Pt and CoO/Pt thin films via thermal gradients, offering a current-free pathway for ultrafast antiferromagnetic spintronics and non-volatile memory applications.

Maciej D\k{a}browski, Tong Wu, Connor R. J. Sait, Jia Xu, Paul S. Keatley, Yizheng Wu, Robert J. Hicken, Olena Gomonay2026-04-08🔬 cond-mat.mes-hall

Disentangling High Harmonic Generation from Surface and Bulk States of a Topological Insulator

This study demonstrates that by tuning the thickness of Bi2_2Se3_3 thin films and applying a quasi-static terahertz field, researchers can effectively isolate and distinguish the high harmonic generation contributions of topological surface states from bulk states, thereby resolving debates on extracting topological signatures in nonlinear optical responses.

Sha Li, Wenyi Zhou, Kazi A. Imroz, Yaguo Tang, Tiana A. Townsend, Vyacheslav Leshchenko, Larissa Boie, Pierre Agostini, Alexandra S. Landsman, Roland K. Kawakami, Lun Yue, Louis F. DiMauro2026-04-08🔬 physics.atom-ph

Ultrafast nonlinear Hall effect in black phosphorus

This paper demonstrates an ultrafast nonlinear Hall effect in centrosymmetric black phosphorus by dynamically breaking inversion symmetry with femtosecond light pulses, revealing a polarization-selective, 300-fs-lasting current generation mechanism supported by momentum-resolved photoemission spectroscopy and *ab-initio* calculations.

Maciej Dendzik, Andrea Marini, Samuel Beaulieu, Shuo Dong, Tommaso Pincelli, Julian Maklar, R. Patrick Xian, Enrico Perfetto, Martin Wolf, Gianluca Stefanucci, Ralph Ernstorfer, Laurenz Rettig2026-04-08🔬 cond-mat.mtrl-sci

Solving the Peierls-Boltzmann transport equation with matrix product states

This paper demonstrates that utilizing matrix product states with an optimized index ordering and a dimensionless formulation enables efficient, high-fidelity solutions to the Peierls-Boltzmann transport equation for crystalline silicon across various transport regimes, achieving sublinear computational scaling and a tenfold reduction in time compared to traditional finite volume methods.

Sangyeop Lee, Hirad Alipanah, Juan José Mendoza-Arenas2026-04-08🔬 cond-mat.mes-hall