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Su Y, He Z, Jiang R, Zhang J. Observation of Linear Magnetoresistance in MoO 2. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:915. [PMID: 38869538 PMCID: PMC11173525 DOI: 10.3390/nano14110915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 05/17/2024] [Accepted: 05/21/2024] [Indexed: 06/14/2024]
Abstract
Magnetoresistance, the change in resistance with applied magnetic fields, is crucial to the magnetic sensor technology. Linear magnetoresistance has been intensively studied in semimetals and semiconductors. However, the air-stable oxides with a large linear magnetoresistance are highly desirable but remain to be fully explored. In this paper, we report the direct observation of linear magnetoresistance in polycrystalline MoO2 without any sign of saturation up to 7 T under 50 K. Interestingly, the linear magnetoresistance reaches as large as 1500% under 7 T at 2 K. The linear field dependence is in great contrast to the parabolic behavior observed in single-crystal MoO2, probably due to phonon scattering near the grain boundaries. Our results pave the way to comprehending magneto-transport behavior in oxides and their potential applications in magnetic sensors.
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Affiliation(s)
- Yulong Su
- Marine Engineering College, Dalian Maritime University, Dalian 116026, China; (Z.H.); (R.J.); (J.Z.)
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Zivieri R, Lumetti S, Létang J. High-Mobility Topological Semimetals as Novel Materials for Huge Magnetoresistance Effect and New Type of Quantum Hall Effect. MATERIALS (BASEL, SWITZERLAND) 2023; 16:7579. [PMID: 38138720 PMCID: PMC10744697 DOI: 10.3390/ma16247579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 12/04/2023] [Accepted: 12/06/2023] [Indexed: 12/24/2023]
Abstract
The quantitative description of electrical and magnetotransport properties of solid-state materials has been a remarkable challenge in materials science over recent decades. Recently, the discovery of a novel class of materials-the topological semimetals-has led to a growing interest in the full understanding of their magnetotransport properties. In this review, the strong interplay among topology, band structure, and carrier mobility in recently discovered high carrier mobility topological semimetals is discussed and their effect on their magnetotransport properties is outlined. Their large magnetoresistance effect, especially in the Hall transverse configuration, and a new version of a three-dimensional quantum Hall effect observed in high-mobility Weyl and Dirac semimetals are reviewed. The possibility of designing novel quantum sensors and devices based on solid-state semimetals is also examined.
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Affiliation(s)
| | | | - Jérémy Létang
- Silicon Austria Labs, 9524 Villach, Austria; (S.L.); (J.L.)
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Mertens F, Mönkebüscher D, Parlak U, Boix-Constant C, Mañas-Valero S, Matzer M, Adhikari R, Bonanni A, Coronado E, Kalashnikova AM, Bossini D, Cinchetti M. Ultrafast Coherent THz Lattice Dynamics Coupled to Spins in the van der Waals Antiferromagnet FePS 3. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2208355. [PMID: 36437480 DOI: 10.1002/adma.202208355] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 11/18/2022] [Indexed: 06/16/2023]
Abstract
Coherent THz optical lattice and hybridized phonon-magnon modes are triggered by femtosecond laser pulses in the antiferromagnetic van der Waals semiconductor FePS3 . The laser-driven lattice and spin dynamics are investigated in a bulk crystal as well as in a 380 nm-thick exfoliated flake as a function of the excitation photon energy, sample temperature and applied magnetic field. The pump-probe magneto-optical measurements reveal that the amplitude of a coherent phonon mode oscillating at 3.2 THz decreases as the sample is heated up to the Néel temperature. This signal eventually vanishes as the phase transition to the paramagnetic phase occurs, thus revealing its connection to the long-range magnetic order. In the presence of an external magnetic field, the optically triggered 3.2 THz phonon hybridizes with a magnon mode, which is utilized to excite the hybridized phonon-magnon mode optically. These findings open a pathway toward the optical control of coherent THz photo-magnonic dynamics in a van der Waals antiferromagnet, which can be scaled down to the 2D limit.
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Affiliation(s)
- Fabian Mertens
- Department of Physics, TU Dortmund University, Otto-Hahn Straße 4, 44227, Dortmund, Germany
| | - David Mönkebüscher
- Department of Physics, TU Dortmund University, Otto-Hahn Straße 4, 44227, Dortmund, Germany
| | - Umut Parlak
- Department of Physics, TU Dortmund University, Otto-Hahn Straße 4, 44227, Dortmund, Germany
| | - Carla Boix-Constant
- Instituto de Ciencia Molecular (ICMol) Universidad de Valencia, Catedrático José Beltrán 2, Paterna, 46890, Spain
| | - Samuel Mañas-Valero
- Instituto de Ciencia Molecular (ICMol) Universidad de Valencia, Catedrático José Beltrán 2, Paterna, 46890, Spain
| | - Margherita Matzer
- Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Altenbergerstr. 69, Linz, 4040, Austria
| | - Rajdeep Adhikari
- Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Altenbergerstr. 69, Linz, 4040, Austria
| | - Alberta Bonanni
- Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Altenbergerstr. 69, Linz, 4040, Austria
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol) Universidad de Valencia, Catedrático José Beltrán 2, Paterna, 46890, Spain
| | | | - Davide Bossini
- Department of Physics, TU Dortmund University, Otto-Hahn Straße 4, 44227, Dortmund, Germany
- Department of Physics and Center for Applied Photonics, University of Konstanz, D-78457, Konstanz, Germany
| | - Mirko Cinchetti
- Department of Physics, TU Dortmund University, Otto-Hahn Straße 4, 44227, Dortmund, Germany
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