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Information can be stored in magnetic materials by encoding with the direction of the magnetic moment of elements. A figure of merit for these systems is the energy needed to change the information rewrite the storage by changing the…

We develop an effective tight-binding Hamiltonian for spin-orbit (SO) interaction in bent carbon nanotubes (CNT) for the electrons forming the $\pi$ bonds between the nearest neighbor atoms. We account for the bend of the CNT and the…

介观与纳米尺度物理 · 物理学 2015-10-30 E. N. Osika , B. Szafran

Electrical manipulation of magnetic order by current-induced spin torques lays the foundation for spintronics. One promising approach is encoding information in the N\'eel vector of antiferromagnetic (AFM) materials, particularly to…

Organic spintronics is a promising emerging field, but the sign of the tunneling magnetoresistance (TMR) is highly sensitive to interface effects, a crucial hindrance to applications. A key breakthrough in molecular electronics was the…

材料科学 · 物理学 2015-06-17 Narjes Gorjizadeh , Su Ying Quek

This study delves into the interaction between a monolayer of molybdenum disulfide (MoS$_2$) and a single Perylene Orange (PO) molecule, representative of inorganic and organic semiconductor materials, respectively. Investigation of the…

材料科学 · 物理学 2024-07-16 Mohammed El Amine Miloudi , Oliver Kühn

Chiral semiconductors such as elemental tellurium (Te) exhibit unconventional spin textures and large charge-to-spin conversion efficiencies, yet the influence of introducing elements on these properties remains underexplored. Here, we…

材料科学 · 物理学 2025-03-10 Sonam Phuntsho

Ferromagnetic metal-organic semiconductor (FM-OSC) hybrid interfaces have shown to play an important role for spin injection in organic spintronics. Here, 11,11,12,12-tetracyanonaptho-2,6-quinodimethane (TNAP) is introduced as an…

The controlled and reversible interconversion between the free-base and the doubly dehydrogenated form of a 5,10,15,20-tetra(p-hydroxyphenyl)porphyrin molecule in an ordered array is demonstrated. This is achieved through voltage pulses by…

Control of hyperfine interactions is a fundamental requirement for quantum computing architecture schemes based on shallow donors in silicon. However, at present, there is lacking an atomistic approach including critical effects of…

介观与纳米尺度物理 · 物理学 2015-06-29 Muhammad Usman , Charles D. Hill , Rajib Rahman , Gerhard Klimeck , Michelle Y. Simmons , Sven Rogge , Lloyd C. L. Hollenberg

We propose a new universal mechanism that makes it possible to drive an individual atomic spin using a spin polarized scanning tunnel microscope (STM) with an oscillating electric signal. We show that the combination of the distance…

介观与纳米尺度物理 · 物理学 2017-11-15 J. L. Lado , A. Ferron , J. Fernandez-Rossier

KO2 exhibits concomitant antiferromagnetic (AFM) and structural transitions, both of which originate from the open-shell 2p electrons of O$_{2}^{-}$ molecules. The structural transition is accompanied by the coherent tilting of O$_{2}^{-}$…

强关联电子 · 物理学 2010-03-24 Minjae Kim , Beom Hyun Kim , Hong Chul Choi , B. I. Min

We propose and theoretically analyze a novel metal-oxide-semiconductor field-effect-transistor (MOSFET) type of spin transistor (hereafter referred to as a spin MOSFET) consisting of a MOS gate structure and half-metallic-ferromagnet (HMF)…

材料科学 · 物理学 2009-11-10 S. Sugahara , M. Tanaka

We study the band structure and transport properties of ferromagnetic tetragonal silicene nanoribbons by using the non-equilibrium Green's function method. The band structure and spin-dependent conductance are discussed under the combined…

介观与纳米尺度物理 · 物理学 2023-01-04 Liehong Liao , Ying Ding , Fei Wan , Jiayan Zhang , Zhihui Chen , Xinyu Cheng , Ru Bai , Gaofeng Xu , Yuan Li

Magnetic materials are crucial for manipulating electron spin and magnetic fields, enabling applications in data storage, spintronics, charge transport, and energy conversion, while also providing insight into fundamental quantum phenomena.…

We model a spin-phase transition in a two-dimensional square array, or a lateral superlattice, of quantum rings in an external perpendicular homogeneous magnetic field. The electron system is placed in a circular cylindrical far-infrared…

Efforts to achieve efficient injection of spin-polarized electrons into a semiconductor, a key prerequisite for developing electronics that exploit the electron's spin degree of freedom, have so far met with limited success. Here we report…

介观与纳米尺度物理 · 物理学 2015-06-12 Sarmita Majumder , Bartek Kardasz , George Kirczenow , Anthony SpringThorpe , Karen L. Kavanagh

We present a comprehensive theoretical investigation of magnetoelectric (ME) coupling mechanisms in 19 altermagnetic and 4 ferrimagnetic Type-I multiferroics using electronic band structure calculations with spin-orbit coupling, a…

Polarization induced spin switching of atoms in magnetic materials opens for possibilities to design and develop advanced spintronic devices, in particular, storage devices where the magnetic state can be controlled by an electric field. We…

材料科学 · 物理学 2018-10-09 Indukuru Ramesh Reddy , Peter M. Oppeneer , Kartick Tarafder

The controllability of charge transport through an organic molecular spin-valve system is theoretically investigated on the basis of a Su-Schrieffer-Heeger model combined with the non-equilibrium Green's function formalism. We show how the…

材料科学 · 物理学 2007-05-23 J. H. Wei , S. J. Xie , L. M. Mei , YiJing Yan

The Magnetoelectric (ME) effect in solids is a prominent cross correlation phenomenon, in which the electric field (${\bm E}$) controls the magnetization (${\bm M}$) and the magnetic field (${\bm H}$) controls the electric polarization…

强关联电子 · 物理学 2015-09-30 Makoto Naka , Sumio Ishihara