2808 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.
This contribution reports on the realization of low-threshold, surface-emitting micro-lasers in the Whispering-Gallery mode using smooth AlGaAs micropillars with high-quality distributed Bragg reflectors, achieving simultaneous comb-like laser action in the 930–970 nm range and a transition to single-mode operation at 130 K for 5 μm pillars with an estimated threshold of 240 μW.
This article presents a numerical model demonstrating that quantum-dot micropillar lasers with hybrid dielectric-semiconductor top mirrors achieve high quality factors (~65,000) and sustain lasing up to 220 K, with a threshold of at least ~370 μW occurring at 130 K.
This article demonstrates that the use of highly strained InGaAs/InAlGaAs superlattice active regions significantly improves the gain, efficiency, and high-temperature performance of 1300-nm lasers by achieving low internal losses and enhanced characteristic temperatures, indicating great potential for VCSEL applications.
This article investigates the low-energy Landau level spectrum of large-angle twisted bilayer graphene, identifies skyrmion-textured excitations, and demonstrates that charge imbalance under a displacement field induces first-order phase transitions between quantum Hall ferromagnetic ground states, as evidenced by the nucleation of multidomain structures and pronounced hysteresis.
Through extensive Hartree-Fock calculations, this paper demonstrates that many-body effects in twisted bilayer graphene significantly renormalize the Fermi velocity and interlayer couplings, shifting the magic angle from to and challenging the paradigm that maximum superconductivity occurs at the minimum bandwidth.
This paper proposes that the existence of a negative local partial density of states (LPDOS) as a hidden variable enables a rigorous reinterpretation of Landauer conductance to unify classical and quantum mechanics, resolve the quantum measurement problem, and theoretically validate the feasibility of time travel.
This contribution presents a physics-guided Bayesian active learning framework that integrates a Langmuir adsorption model with a two-stage parameter estimation strategy to autonomously and efficiently optimize pulse durations in atomic layer deposition, thereby achieving faster convergence, higher prediction accuracy, and significantly reduced precursor consumption compared to conventional data-driven approaches.
This paper investigates how coupling a Quantum Hall liquid to 3+1 dimensional dynamical electromagnetism renders the system gapless, resulting in a quantized Hall resistance and a non-zero longitudinal resistance proportional to the fine structure constant, while introducing corrections to the Hall conductance and quasiparticle properties.
This paper demonstrates that non-Abelian multigap band topology, characterized by nontrivial Euler class invariants, induces observable magnetononlinear Hall effects in tunable two-dimensional kagome metal-organic frameworks, offering a pathway to experimentally detect this uncharted topological phase through controllable magnetotransport measurements.
This first-principles study reveals that the quasi-2D C2N2O material is a thermally stable, low-thermal-conductivity semiconductor with a tunable indirect band gap and strong anisotropic optical absorption, making it a promising candidate for nanoscale optoelectronic and thermal control applications.