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Theoretical calculations, based on hybrid exchange density functional theory, are used to show that in graphene a periodic array of defects generates a ferromagnetic ground state at room temperature for unexpectedly large defect…

Materials Science · Physics 2009-11-13 L. Pisani , B. Montanari , N. M. Harrison

To realize room temperature ferromagnetic semiconductors is still a challenge in spintronics. Recent experiments have obtained two-dimensional (2D) room temperature ferromagnetic metals, such as monolayer MnSe2. In this paper, we proposed a…

Materials Science · Physics 2024-05-21 Jia-Wen Li , Gang Su , Bo Gu

Graphene is a quantum spin Hall insulator with a 45 $\mu$eV wide non-trivial topological gap induced by the intrinsic spin-orbit coupling. Even though this zero-field spin splitting is weak, it makes graphene an attractive candidate for…

Spin injection using ferromagnetic semiconductors at room temperature is a building block for the realization of spin-functional semiconductor devices. Nevertheless, this has been very challenging due to the lack of reliable…

Materials Science · Physics 2021-06-11 Shobhit Goel , Nguyen Huynh Duy Khang , Le Duc Anh , Pham Nam Hai , Masaaki Tanaka

The quantum Hall effect is widely used for the investigation of fundamental phenomena, ranging from topological phases to composite fermions. In particular, the discovery of a room temperature resistance quantum in graphene is significant…

The comprehensive search for multifunctional materials has resulted in the discovery of semiconductors and oxides showing ferromagnetic features persisting to room temperature. In this tutorial review the methods of synthesis of these…

Materials Science · Physics 2011-01-12 Alberta Bonanni , Tomasz Dietl

Considerable efforts have been devoted recently to synthesize diluted magnetic semiconductors having ferromagnetic properties at room temperature because of their technological impacts for spintronic devices. In 2001 successful growth of…

Two-dimensional materials have been gaining great attention as they displayed a broad series of electronic properties that ranging from superconductivity to topology. Among them, those which possess magnetism are most desirable, enabling us…

Materials Science · Physics 2019-06-14 Fang Zhang , Xing-Qiang Shi , Zi-Kang Tang

Realizing ferromagnetic semiconductors with room Curie temperature $T\rm_C$ remains a challenge in spintronics. Inspired by the recent experimental progress on the nanotubes based on 2D van der Waals non-magnetic transition-metal…

Materials Science · Physics 2025-01-24 Jia Wen Li , Gang Su , Bo Gu

Room temperature ferromagnetic materials composed only by light elements like carbon, hydrogen and/or nitrogen, so called carbon magnet, are very attractive for creating new material categories both in science and industry. Recently several…

Mesoscale and Nanoscale Physics · Physics 2011-01-24 Norio Ota , Narjes Gorjizadeh , Yoshiyuki Kawazoe

Magnetic materials have found wide application ranging from electronics and memories to medicine. Essential to these advances is the control of the magnetic order. To date, most room-temperature applications have a fixed magnetic moment…

Because graphene is an atomically two-dimensional gapless semiconductor with nearly identical conduction and valence bands, graphene-based bilayers are attractive candidates for high-temperature electron-hole pair condensation. We present…

Mesoscale and Nanoscale Physics · Physics 2008-09-04 Hongki Min , Rafi Bistritzer , Jung-Jung Su , A. H. MacDonald

We report the batch fabrication of graphene field-effect-transistors (GFETs) with nanoperforated graphene as channel. The transistors were cut and encapsulated. The encapsulated GFETs display saturation regions that can be tuned by…

Mesoscale and Nanoscale Physics · Physics 2016-12-21 Mircea Dragoman , Adrian Dinescu , Daniela Dragoman

We propose a strategy to obtain conducting organic materials with fully spin-polarized Fermi surface, lying at a singular flat band, with antiferromagnetically coupled magnetic moments that reside in pi-orbitals of nanographenes. We…

Mesoscale and Nanoscale Physics · Physics 2026-04-17 J. Phillips , J. C. G. Henriques , J. Fernández-Rossier , A. T. Costa

In the field of condensed matter, graphene plays a central role as an emerging material for nanoelectronics. Nevertheless, graphene is a semimetal, which constitutes a severe limitation for some future applications. Therefore, a lot of…

Mesoscale and Nanoscale Physics · Physics 2018-10-24 S. Zhao , J. Lavie , L. Rondin , L. Orcin-Chaix , C. Diederichs , Ph. Roussignol , Y. Chassagneux , C. Voisin , K. Müllen , A. Narita , S. Campidelli , J. S. Lauret

Two-dimensional materials hosting ferroelectricity and ferromagnetism are crucial for low-power and high-speed information processing technologies. However, intrinsic 2D multiferroics in the monolayer limit are rare. Here, we demonstrate…

Mesoscale and Nanoscale Physics · Physics 2023-10-25 Imran Ahamed , Atasi Chakraborty , Pushpendra Yadav , Rik Dey , Yogesh Singh Chauhan , Somnath Bhowmick , Amit Agarwal

Half-metals and spin gapless semiconductors are promising candidates for spintronic applications due to the complete (100%) spin polarization of electrons around the Fermi level. Based on recent experimental and theoretical findings of…

Mesoscale and Nanoscale Physics · Physics 2016-04-25 Guoying Gao , Guangqian Ding , Jie Li , Kailun Yao , Menghao Wu , Meichun Qian

Diluted magnetic semiconductors including Mn-doped GaAs are attractive for gate-controlled spintronics but Curie transition at room temperature with long-range ferromagnetic order is still debatable to date. Here, we report the…

The discovery of ferromagnetism in Mn doped GaAs [1] has ignited interest in the development of semiconductor technologies based on electron spin and has led to several proof-of-concept spintronic devices [2-4]. A major hurdle for realistic…

Materials Science · Physics 2009-11-11 Dale Kitchen , Anthony Richardella , Jian-Ming Tang , Michael E. Flatte , Ali Yazdani

Alternating layers of granular Iron (Fe) and Titanium dioxide (TiO$_{2-\delta}$) were deposited on (100) Lanthanum aluminate (LaAlO$_3$) substrates in low oxygen chamber pressure using a controlled pulsed laser ablation deposition…

Materials Science · Physics 2007-05-23 Soack Dae Yoon , Carmine Vittoria , Vincent G. Harris , Allan Widom
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