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相关论文: Paramagnetic molecule induced strong antiferromagn…

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We present a theoretical study of magnetic field driven spin transitions of electrons in coupled lateral quantum dot molecules. A detailed numerical study of spin phases of artificial molecules composed of two laterally coupled quantum dots…

介观与纳米尺度物理 · 物理学 2015-06-25 Ramin M. Abolfath , Pawel Hawrylak

Spintronics in ferromagnetic metals is built on a complementary set of phenomena in which magnetic configurations influence transport coefficients and transport currents alter magnetic configurations. In this Letter we propose that…

介观与纳米尺度物理 · 物理学 2007-05-23 A. S. Nunez , R. A. Duine , A. H. MacDonald

Antiferromagnetic spintronics exhibits ultra-high operational speed and stability in a magnetic field, holding promise for the realization of next-generation ultra-high-speed magnetic storage. However, theoretical exploration of the…

材料科学 · 物理学 2025-01-08 Zhi Yan , Dan Qiao , Wentian Lu , Xinlong Dong , Xiaohong Xu

Phenomena that are highly sensitive to magnetic fields can be exploited in sensors and non-volatile memories. The scaling of such phenomena down to the single molecule level may enable novel spintronic devices. Here we report…

介观与纳米尺度物理 · 物理学 2015-10-09 Ben Warner , Fadi El Hallak , Henning Prüser , John Sharp , Mats Persson , Andrew J. Fisher , Cyrus F. Hirjibehedin

We propose a nonequilibrium Monte Carlo (MC) approach to explore nonequilibrium dynamical ferromagnetism of interacting single molecule magnets (SMMs). Both quantum spin tunneling and thermally activated spin reversal are successfully…

介观与纳米尺度物理 · 物理学 2009-11-10 Gui-Bin Liu , Bang-Gui Liu

Magnetic droplets, a class of highly non-linear magnetodynamical solitons, can be nucleated and stabilized in nanocontact spin-torque nano-oscillators where they greatly increase the microwave output power. Here, we experimentally…

Controlling the magnetization reversal process of magnetic elements is important for a wide range of applications that make use of magnetoresistive effects, but is difficult to achieve for devices that require adjacent thin film structures…

介观与纳米尺度物理 · 物理学 2016-11-23 Gavin D. Scott , Ting-Chen Hu

Antiferromagnetic (AFM) materials with zero or vanishingly small macroscopic magnetization are nowadays the constituent elements of spintronic devices. However, possibility to use them as active elements that show nontrivial controllable…

材料科学 · 物理学 2013-05-30 Helen V. Gomonay , Roman Kunitsyn , Vadim M. Loktev

Density-functional calculations are used to clarify the role of an ultrathin LiF layer on Al electrodes used in molecular electronics. The LiF layer creates a sharp density of states (DOS), as in a scanning-tunneling microscope (STM) tip.…

Motivated by the recent achievements in manipulation of C60 molecules in STM experiments, we study theoretically the structure and electronic properties of a C60 molecule in an STM-tunneljunction with a magnetic tip and magnetic adatom on a…

介观与纳米尺度物理 · 物理学 2013-09-30 Mohammad Koleini , Mads Brandbyge

Ferroelectric polarization switching in electrically controlled van der Waals multiferroic tunnel junctions (vdW-MFTJs) causes atomic migration, compromising device stability and fatigue resistance. Here we propose a fully magnetically…

材料科学 · 物理学 2025-05-20 Zhi Yan , Xujin Zhang , Jianhua Xiao , Cheng Fang , Xiaohong Xu

The spin filtering effect, distinct decaying lengths experienced by oppositely spin-polarized electrons in a magnetic barrier, generally occurs in ferromagnetic (FM) insulators or semiconductors. With the rise of altermagnetic (ALM)…

材料科学 · 物理学 2025-01-08 Boyuan Chi , Leina Jiang , Yu Zhu , Guoqiang Yu , Caihua Wan , Xiufeng Han

We theoretically study the spin-polarized transport through a single-molecule magnet, which is weakly coupled to ferromagnetic leads, by means of the rate-equation approach. We consider both the ferromagnetic and antiferromagnetic…

介观与纳米尺度物理 · 物理学 2012-03-22 Haiqing Xie , Qiang Wang , Bo Chang , Hujun Jiao , J. -Q. Liang

We report on the enhancement of antiferromagnetic coupling in epitaxial Fe/Si/Fe structures by voltage-driven spin-polarized tunneling currents. Using the ballistic electron magnetic microscopy we established that the hot-electron collector…

介观与纳米尺度物理 · 物理学 2015-05-30 R. R. Gareev , M. Schmid , J. Vancea , C. Back , R. Schreiber , D. Buergler , C. M. Schneider , F. Stromberg , H. Wende

Using the nascent concept of quantum spin-transfer torque [A. Zholud et al., Phys. Rev. Lett. {\bf 119}, 257201 (2017); M. D. Petrovi\'{c} {\em et al.}, Phys. Rev. X {\bf 11}, 021062 (2021)], we demonstrate that a current pulse can be…

Van der Waals (vdW) heterostructures, stacking different two-dimensional materials, have opened up unprecedented opportunities to explore new physics and device concepts. Especially interesting are recently discovered two-dimensional…

材料科学 · 物理学 2019-09-04 Xinlu Li , Evgeny Y. Tsymbal , Jing-Tao Lü , Jia Zhang , Long You , Yurong Su

A review of new developments in theoretical and experimental electronic structure investigations of half-metallic ferromagnets (HMF) is presented. Being semiconductors for one spin projection and metals for another ones, these substances…

材料科学 · 物理学 2008-09-17 M. I. Katsnelson , V. Yu. Irkhin , L. Chioncel , A. I. Lichtenstein , R. A. de Groot

We study transport properties of a single-molecule magnet (SMM) weakly coupled to one nonmagnetic and one ferromagnetic lead. Using the diagrammatic technique in real time, we calculate transport in the sequential and cotunneling regimes…

介观与纳米尺度物理 · 物理学 2010-10-29 Maciej Misiorny , Irenuesz Weymann , Jozef Barnas

High resolution inelastic neutron scattering is used to study excitations in the organometallic magnet DMACuCl$_3$. The correct magnetic Hamiltonian describing this material has been debated for many years. Combined with high field bulk…

强关联电子 · 物理学 2009-11-13 M. B. Stone , W. Tian , M. D. Lumsden , G. E. Granroth , D. Mandrus , J. -H. Chung , N. Harrison , S. E. Nagler

Tunneling Magnetoresistance between two ferrromagnets is an issue of fundamental importance in spintronics. In this work, we show that tunneling magnetoresistance can also emerge in junctions composed of ferromagnets and time-reversal…

介观与纳米尺度物理 · 物理学 2016-02-09 Zhongbo Yan , Shaolong Wan