Tootfinder

Bias-field-free operation of nitrogen-vacancy ensembles in diamond for accurate vector magnetometry
Lilian Childress, Vincent Halde, Kayla Johnson, Andrew Lowther, David Roy-Guay, Romain Ruhlmann, Adrian Solyom
https://arxiv.org/abs/2505.24574

Bias-field-free operation of nitrogen-vacancy ensembles in diamond for accurate vector magnetometry
Accurate measurement of vector magnetic fields is critical for applications including navigation, geoscience, and space exploration. Nitrogen-vacancy (NV) center spin ensembles offer a promising solution for high-sensitivity vector magnetometry, as their different orientations in the diamond lattice measure different components of the magnetic field. However, the bias magnetic field typically used to separate signals from each NV orientation introduces inaccuracy from drifts in permanent magnet…

Our planet is currently reverberating from the impact of a powerful coronal mass ejection (CME) that struck Earth head-on in the early hours of June 1 — and the resulting auroras were absolutely stunning.
The CME erupted during an M8.2 class solar flare eruption on May 30 at 8:05 p.m. EDT (00:05 GMT on May 31) and has been racing toward Earth at nearly 1,938 km/s or 4.3 million mph.
When it slammed into Earth's magnetic field, the impact triggered a severe (G4) geomagnetic sto…

Severe G4 geomagnetic storm sparks northern lights across US and beyond (photos)
The speedy solar storm arrived in style, sparking stunning aurora displays as far south as California and New Mexico.

Observation of universal topological magnetoelectric switching in multiferroic GdMn2O5
Haowen Wang, Fan Wang, Ming Yang, Yuting Chang, Mengyi Shi, Liang Li, Jun-Ming Liu, Junfeng Wang, Shuai Dong, Chengliang Lu
https://arxiv.org/abs/2506.00902

Observation of universal topological magnetoelectric switching in multiferroic GdMn2O5
Topological magnetoelectricity was recently revealed as an emergent topic, which opens a unique route to precisely control magnetoelectric functionality. Here we report the synchronous magnetic-electric-cycle operation of topological magnetoelectric switching in GdMn2O5. Compared with pure magnetic-cycle operation, this topological winding can be accessed in a much broader parameter space, i.e. orientation of magnetic field is not limited to the magic angle and the effect can persist up to the …

Fine-Tuning ASR for Stuttered Speech: Personalized vs. Generalized Approaches
Dena Mujtaba, Nihar Mahapatra
https://arxiv.org/abs/2506.00853 https://

Fine-Tuning ASR for Stuttered Speech: Personalized vs. Generalized Approaches
Stuttering -- characterized by involuntary disfluencies such as blocks, prolongations, and repetitions -- is often misinterpreted by automatic speech recognition (ASR) systems, resulting in elevated word error rates and making voice-driven technologies inaccessible to people who stutter. The variability of disfluencies across speakers and contexts further complicates ASR training, compounded by limited annotated stuttered speech data. In this paper, we investigate fine-tuning ASRs for stuttered…

Optimizing Question Semantic Space for Dynamic Retrieval-Augmented Multi-hop Question Answering
Linhao Ye, Lang Yu, Zhikai Lei, Qin Chen, Jie Zhou, Liang He
https://arxiv.org/abs/2506.00491

Optimizing Question Semantic Space for Dynamic Retrieval-Augmented Multi-hop Question Answering
Retrieval-augmented generation (RAG) is usually integrated into large language models (LLMs) to mitigate hallucinations and knowledge obsolescence. Whereas,conventional one-step retrieve-and-read methods are insufficient for multi-hop question answering, facing challenges of retrieval semantic mismatching and the high cost in handling interdependent subquestions. In this paper, we propose Optimizing Question Semantic Space for Dynamic Retrieval-Augmented Multi-hop Question Answering (Q-DREAM). …

Interstellar Polarization Survey. V. Galactic magnetic field tomography in the spiral arms using optical and near-infrared starlight polarization
Y. Angarita (Department of Astrophysics/IMAPP, Radboud University, Nijmegen, The Netherlands, Department of Space, Earth & Environment, Chalmers University of Technology, 412 93 Gothenburg, Sweden), M. J. F. Versteeg (Department of Astrophysics/IMAPP, Radboud University, Nijmegen, The Netherlands), M. Haverkorn (Department of Astrophysics…

Interstellar Polarization Survey. V. Galactic magnetic field tomography in the spiral arms using optical and near-infrared starlight polarization
Interstellar linear polarization occurs when starlight passes through elongated dust grains aligned by interstellar magnetic fields. The observed polarization can come from different dust structures along the line of sight (LOS). By combining polarization measurements with stellar distances, we can study the plane-of-sky Galactic magnetic field (GMF) between the observer and the star and separate the contributions of clouds with different GMF properties. We used optical and near-infrared (NIR) …

Observation of pseudogap in Cr_{1-x}Y_xN magnetic alloy and its impact on the Seebeck coefficient by ab-initio calculations
Luis Felipe Leon-Pinzon, Elisabeth Restrepo-Parra, Andres Manuel Garay-Tapia
https://arxiv.org/abs/2506.00687

Observation of pseudogap in Cr_{1-x}Y_xN magnetic alloy and its impact on the Seebeck coefficient by ab-initio calculations
Thermoelectric materials require high electronic conductivity and low thermal conductivity. CrN has been shown to have low phononic thermal conductivity, making it a potential candidate for thermoelectric applications. In addition, similarities have been observed between YN and ScN suggesting that the CrYN alloy may have interesting thermoelectric properties. As CrYN has not been studied in detail at the level of thermoelectric properties, the first study on CrYN alloy of Seebeck coefficient an…

Ensemble Modeling of the Solar Wind Flow with Boundary Conditions Governed by Synchronic Photospheric Magnetograms. I. Multi-point Validation in the Inner Heliosphere
Dinesha V. Hegde (Department of Space Science, The University of Alabama in Huntsville, Huntsville, USA, Center for Space Plasma and Aeronomic Research, The University of Alabama in Huntsville, Huntsville, USA), Tae K. Kim (Center for Space Plasma and Aeronomic Research, The University of Alabama in Huntsville, Huntsville…

Ensemble Modeling of the Solar Wind Flow with Boundary Conditions Governed by Synchronic Photospheric Magnetograms. I. Multi-point Validation in the Inner Heliosphere
The solar wind (SW) is a vital component of space weather, providing a background for solar transients such as coronal mass ejections, stream interaction regions, and energetic particles propagating toward Earth. Accurate prediction of space weather events requires a precise description and thorough understanding of physical processes occurring in the ambient SW plasma. Ensemble simulations of the three-dimensional SW flow are performed using an empirically-driven magnetohydrodynamic heliospher…

This https://arxiv.org/abs/2501.02544 has been replaced.
initial toot: https://mastoxiv.page/@a…

Investigation of magnetic ordering with spin reorientation transition and optical properties in Dy$_2$CoCrO$_6$ nanomaterials
This study reports the synthesis and physical properties of polycrystalline Dy$_2$CoCrO$_6$ (DCCO) nanoparticles. Analysis of the powder X-ray diffraction (XRD) pattern using Rietveld refinement showed that the compound crystallizes in an orthorhombic crystal structure with a space group Pbnm. The particle size of approximately 57 nm was confirmed through micrographs obtained from field emission scanning electron microscopy and transmission electron microscopy. The X-ray photoelectron spectrosc…

Direct determination of layer anomalous Hall conductivity using uniaxial Wannier functions
Yume Morishima, Fumiyuki Ishii, Naoya Yamaguchi
https://arxiv.org/abs/2506.01160

Direct determination of layer anomalous Hall conductivity using uniaxial Wannier functions
We propose a method for computing layer anomalous Hall conductivity (LAHC) in real space by integrating the Fukui-Hatsugai-Suzuki method with hybrid Wannier functions localized along a single axis. To validate the method, we calculated the LAHC of axion-insulating MnBi$_2$Te$_4$ and confirmed the agreement between the sum of LAHC on the surface and the surface AHC previously reported. We further applied the method to antiferromagnetic Mn$_2$Bi$_2$Te$_5$ and examined the dependence on the magnet…