Fedor Nigmatulin

Observation of tunable chiral spin textures with nonlinear optics

T. V. C. Antão, Adolfo Otero Fumega, Mikko Turunen, Yongqiang Zhang et autres

Abstract Chiral spin textures, such as spin spirals and skyrmions, are key to advancing spintronics by enabling ultrathin, energy-efficient memory, and high-density data storage and processing. However, their realization remains hindered by the scarcity of suitable host materials and the formidable experimental …

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Hamiltonian learning for spin-spiral moiré magnets from electronic magnetotransport (Data)

Fedor Nigmatulin, Greta Lupi, José Luis Lado, Zhipei Sun

This repository contains data used to generate the figures and results presented in the manuscript "Hamiltonian learning for spin-spiral moiré magnets from electronic magnetotransport ".

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Hamiltonian learning for spin-spiral moiré magnets from electronic magnetotransport (Data)

Fedor Nigmatulin, Greta Lupi, José Luis Lado, Zhipei Sun

This repository contains data used to generate the figures and results presented in the manuscript "Hamiltonian learning for spin-spiral moiré magnets from electronic magnetotransport ".

fi (code pays fourni par la source)

Hamiltonian learning for spin-spiral moiré magnets from electronic magnetotransport

Fedor Nigmatulin, Greta Lupi, José Luis Lado, Zhipei Sun

Two-dimensional noncollinear magnetic states, such as spin-spiral magnets, offer an excellent platform for investigating fundamental phenomena, with potential for advancing stray-field-free spintronics. However, detection and characterization of noncollinear magnetic states in two-dimensional systems remain challenging, motivating the development of alternative probing methods. …

Hamiltonian learning for spin-spiral moiré magnets from electronic magnetotransport

Fedor Nigmatulin, Greta Lupi, José Luis Lado, Zhipei Sun

Two-dimensional noncollinear magnetic states, such as spin-spiral magnets, offer an excellent platform for investigating fundamental phenomena, with potential for advancing stray-field-free spintronics. However, detection and characterization of noncollinear magnetic states in two-dimensional systems remain challenging, motivating the development of alternative probing methods. …

Magneettisten ja eksitonisten kaksiulotteisten materiaalien nousevat ilmiöt

Fedor Nigmatulin

The rapid development of two-dimensional (2D) materials is driven by their key properties, including quantum confinement, tunability via external control, and integrability into van der Waals heterostructures. These features make 2D materials a versatile platform for a variety of emergent phenomena with …

Disorder- and Interaction-Driven Quantum Criticality in WSe2

Nasir Ali, Fida Ali, Hyungyu Choi, Yuqing Huang et autres

Quantum fluctuations resulting from strong Coulomb interactions or strong disorders lead to quantum phase transitions (QPTs) in 2D materials. However, understanding of disorder- and interaction-driven QPTs remains a fundamental challenge in 2D materials owing to the presence of strong disorder and strong …

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Broadband Miniaturized Spectrometers with van der Waals Junctions

Md Gius Uddin, Susobhan Das, Abde Mayeen Shafi, Lei Wang et autres

Miniaturized spectrometers are crucial for applications in onchip and implantable devices, requiring high spectral resolution in limited spaces. Here, we present our van der Waals heterojunction-based spectrometers that achieve tunable spectral responses through band structure engineering, offering sub-nanometer wavelength resolution and a …

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Electrical probe of spin-spiral order in quantum spin Hall/spin-spiral magnet van der Waals heterostructures

Fedor Nigmatulin, José Luis Lado, Zhipei Sun

Two-dimensional spin-spiral magnets provide promising building blocks for van der Waals heterostructures due to their tunable spin textures and potential for novel functionalities for quantum devices. However, due to its vanishing magnetization and two-dimensional nature, it is challenging to detect the existence …

Miniaturized spectral sensing with a tunable optoelectronic interface

Xiaoqi Cui, Fedor Nigmatulin, Igor V. Reduto, Andreas C. Liapis et autres

Reconstructive optoelectronic spectroscopy has generated substantial interest in the miniaturization of traditional spectroscopic tools, such as spectrometers. However, most state-of-the-art demonstrations face fundamental limits of rank deficiency in the photoresponse matrix. In this work, we demonstrate a miniaturized spectral sensing system using …

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Polariton-assisted long-distance energy transfer between excitons in two-dimensional semiconductors

Tuomas Pajunpää, Fedor Nigmatulin, Suvi‐Tuuli Akkanen, Henry A. Fernández et autres

Polaritons formed by strong exciton-photon coupling can drastically increase the distance of coherent energy exchange between excitonic materials, but poor durability or low operational temperature in previously demonstrated materials has limited the range of possible applications. Here, the authors demonstrate two-dimensional transition …

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Broadband miniaturized spectrometers with a van der Waals tunnel diode

Md Gius Uddin, Susobhan Das, Abde Mayeen Shafi, Lei Wang et autres

Abstract Miniaturized spectrometers are of immense interest for various on-chip and implantable photonic and optoelectronic applications. State-of-the-art conventional spectrometer designs rely heavily on bulky dispersive components (such as gratings, photodetector arrays, and interferometric optics) to capture different input spectral components that increase …

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