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000201498 1001_ $$0P:(DE-HGF)0$$aWieser, R.$$b0$$eCorresponding Author
000201498 245__ $$aA theoretical study of the dynamical switching of a single spin by exchange forces
000201498 260__ $$a[Bad Honnef]$$bDt. Physikalische Ges.$$c2013
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000201498 520__ $$aWe demonstrate the possibility of dynamically switching the spin of a single atom or molecule with the magnetic tip of an atomic force microscope making use of the acting exchange forces. We choose single V-, Nb- and Ta-benzene molecules as model systems and calculate the exchange interaction with an Fe tip using density functional theory. The exchange energy displays a Bethe?Slater-type behavior with ferromagnetic coupling at large tip?sample distance and antiferromagnetic coupling at closer proximity. The exchange energies reach maximum values of a few tens of meV, which allows one to switch single spins by overcoming the energy barrier due to the magneto-crystalline anisotropy. The spin dynamics of the system was explored by solving the time-dependent Schr?dinger equation with additional Landau?Lifshitz-like spin relaxation. We find that the distance dependence of the exchange interaction as well as the appearance of quantum tunneling results in different scenarios for the switching behavior, e.g. the tip can switch the adatom or lead to a stable superposition state with zero magnetization.
000201498 536__ $$0G:(DE-HGF)POF2-422$$a422 - Spin-based and quantum information (POF2-422)$$cPOF2-422$$fPOF II$$x0
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000201498 7001_ $$0P:(DE-Juel1)130583$$aCaciuc, V.$$b1$$ufzj
000201498 7001_ $$0P:(DE-HGF)0$$aLazo, C.$$b2
000201498 7001_ $$0P:(DE-HGF)0$$aHölscher, H.$$b3
000201498 7001_ $$0P:(DE-HGF)0$$aVedmedenko, E. Y.$$b4
000201498 7001_ $$0P:(DE-HGF)0$$aWiesendanger, R.$$b5
000201498 773__ $$0PERI:(DE-600)1464444-7$$a10.1088/1367-2630/15/1/013011$$gVol. 15, no. 1, p. 013011 -$$n1$$p013011$$tNew journal of physics$$v15$$x1367-2630$$y2013
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000201498 9132_ $$0G:(DE-HGF)POF3-142$$1G:(DE-HGF)POF3-140$$2G:(DE-HGF)POF3-100$$aDE-HGF$$bForschungsbereich Energie$$lFuture Information Technology - Fundamentals, Novel Concepts and Energy Efficiency (FIT)$$vControlling Spin-Based Phenomena$$x0
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