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This paper addresses a difficult inverse problem that involves the reconstruction of a three-dimensional model of tetrahedral amorphous semiconductors via inversion of diffraction data. By posing the material-structure determination as a…

无序系统与神经网络 · 物理学 2019-12-06 Dil K. Limbu , Stephen R. Elliott , Raymond Atta-Fynn , Parthapratim Biswas

We derive a kinetic theory capable of dealing both with large spin-orbit coupling and Kondo screening in dilute magnetic alloys. We obtain the collision integral non-perturbatively and uncover a contribution proportional to the momentum…

强关联电子 · 物理学 2021-10-28 Chunli Huang , Ilya Tokatly , Miguel Cazalilla

We report a neutron scattering study of the spin excitation spectrum in the superconducting state of slightly overdoped Bi2Sr2CaCu2O8+d system (Tc=87 K). We focus on the dispersion of the resonance peak in the superconducting state that is…

超导电性 · 物理学 2010-12-02 B. Fauqué , Y. Sidis , L. Capogna , A. Ivanov , K. Hradil , C. Ulrich , A. I. Rykov , B. Keimer , P. Bourges

Spin waves in the the rare earth orthorferrite YFeO$_3$ have been studied by inelastic neutron scattering and analyzed with a full four-sublattice model including contributions from both the weak ferromagnetic and hidden antiferromagnetic…

In this paper, we illustrate how polarized neutron scattering can be used to isolate the spin-spin correlations of modes forming flat bands in a frustrated magnetic system hosting a classical spin liquid phase. In particular, we explain why…

Scatter due to interaction of photons with the imaged object is a fundamental problem in X-ray Computed Tomography (CT). It manifests as various artifacts in the reconstruction, making its abatement or correction critical for image quality.…

医学物理 · 物理学 2024-01-30 Berk Iskender , Yoram Bresler

The presence of a large applied magnetic field removes the degeneracy of the vacuum energy states for spin-up and spin-down neutrons. For polarized neutron reflectometry, this must be included in the reference potential energy of the…

Single crystal inelastic neutron scattering is used to study spin wave excitations in the fully polarized state of the frustrated quantum ferro-antiferromagnet BaCdVO(PO$_4$)$_2$. The data analysis is based on a Heisenberg spin Hamiltonian…

强关联电子 · 物理学 2021-04-07 V. K. Bhartiya , S. Hayashida , K. Yu. Povarov , Z. Yan , Y. Qiu , S. Raymond , A. Zheludev

Neutron diffraction and muon spin relaxation ($\mu$SR) studies are presented for the newly characterized polymorph of NiNb$_2$O$_6$ ($\beta$-NiNb$_2$O$_6$) with space group P4$_2$/n and $\mu$SR data only for the previously known columbite…

Magnon spin currents in the ferrimagnetic garnet Tb3Fe5O12 with 4f electrons were examined through the spin-Seebeck effect and neutron scattering measurements. The compound shows a magnetic compensation, where the spin-Seebeck signal…

Extensive Monte Carlo simulations are performed to analyze a recent neutron diffraction experiment on a distorted triangular lattice compound RbCoBr$_3$. We consider a spin-lattice model, where both spin and lattice are Ising variables.…

材料科学 · 物理学 2008-09-29 Tota Nakamura , Yoichi Nishiwaki

We investigate the sensitivity of a recently proposed method for precision measurement [Phys. Rev. Lett. 106, 140502 (2011)], focusing on an implementation based on solid-state spin systems. The scheme amplifies a quantum sensor response to…

量子物理 · 物理学 2013-02-26 P. Cappellaro , G. Goldstein , J. S. Hodges , L. Jiang , J. R. Maze , A. S. Sørensen , M. D. Lukin

This paper proposes a physics-informed neural operator (PINO) framework for solving inverse scattering problems, enabling rapid and accurate reconstructions under diverse measurement conditions. In the proposed approach, the dielectric…

计算物理 · 物理学 2026-03-27 Q. C. Dong , Zi-Xuan Su , Qing Huo Liu , Wen Chen , Zhizhang , Chen

The Knight shift of nuclear magnetic resonance is an experimental probe of the paramagnetic spin susceptibility in metals. Information about the electron pairing in superconductors can be extracted from the Knight shift in the small-sized…

超导电性 · 物理学 2025-02-26 Serguei N. Burmistrov

This work presents the modeling of the magnetic 3d sublattice in mixed orthoferrites-orthochromites YFe1-xCrxO3 using classical Monte Carlo methods. It is shown that, when taking into account the competition of the Dzyaloshinskii vectors in…

强关联电子 · 物理学 2025-12-10 E. V. Vasinovich , V. A. Ulitko , A. S. Moskvin

Traditionally, sparse retrieval systems relied on lexical representations to retrieve documents, such as BM25, dominated information retrieval tasks. With the onset of pre-trained transformer models such as BERT, neural sparse retrieval has…

信息检索 · 计算机科学 2023-07-21 Nandan Thakur , Kexin Wang , Iryna Gurevych , Jimmy Lin

We report high-resolution inelastic neutron scattering measurements of the excitation spectrum in large single crystals of the spin-1/2 triangular lattice Ising-like antiferromagnet Na2BaCo(PO4)2 in magnetic fields applied transverse to the…

强关联电子 · 物理学 2025-09-16 Leonie Woodland , Ryutaro Okuma , J. Ross Stewart , Christian Balz , Radu Coldea

The chromium spinels MgCr2O4 and ZnCr2O4 are prime examples of the highly frustrated pyrochlore lattice antiferromagnet. Experiment has carefully established that both materials, upon cooling, distort to lower symmetry and order…

强关联电子 · 物理学 2025-02-28 Ludovic D. C. Jaubert , Yasir Iqbal , Harald O. Jeschke

We revisit the problem of diffusive proximity systems involving superconductors and normal metals (or ferromagnets) with magnetic disorder. On the length scales much larger than its correlation length, the effect of sufficiently weak…

超导电性 · 物理学 2009-10-05 D. A. Ivanov , Ya. V. Fominov , M. A. Skvortsov , P. M. Ostrovsky

Controlling electron spins strongly coupled to magnetic and nuclear spins in solid state systems is an important challenege in the field of spintronics and quantum computation. We show here that electron droplets with no net spin in…

介观与纳米尺度物理 · 物理学 2015-06-03 Ramin M. Abolfath , Marek Korkusinski , Thomas Brabec , Pawel Hawrylak