Spin-polarized field emission from Ni(001) and Ni(111) surfaces
نویسندگان
چکیده
T. Ohwaki,1 D. Wortmann,2 H. Ishida,3 S. Blügel,2 and K. Terakura1,4 1Research Institute for Computational Sciences, AIST, Tsukuba, Ibaraki 306-8568, Japan 2Institut für Festkörperforschung, Forschungszentrum Jülich, 52425 Jülich, Germany 3CREST, JST, and Nihon University, Sakura-josui, Tokyo 156-8550, Japan 4Creative Research Initiative “Sousei,” Hokkaido University, N21W10 Kita-ku, Sapporo 001-0021, Japan Received 29 March 2006; published 22 June 2006
منابع مشابه
Highly spin-polarized field emissions induced by quantum size effects in ultrathin films of Fe on W(001).
Spin-polarized field emissions from Fe pseudomorphic ultrathin films on W(001) surfaces are studied by density functional calculations. We found that nearly completely spin-polarized field emission currents can be realized in two and four Fe layers on W(001) and that these systems have the additional advantages of thermal stability and low work functions. The unusually high spin polarizations o...
متن کاملNovel Studies of Spin-polarized Electrons Emitted during Grazing Incidence Ion Reflection at Magnetic Surfaces
Using a new technique, spin-polarized electron emission spectroscopy (SPEES) and electron capture spectroscopy (ECS). the electron spin polarization (ESP) at the topmost surface layer of ferromagnetic materials is investigated. All surfaces are well characterized using AES, LEED. RHEED and STM. Nonzero ESP is found at remanently magnetized surfaces of atomically clean, amorphous Fes,B,, and (ll...
متن کاملRashba effect in the graphene/ni(111) system.
We report on angle-resolved photoemission studies of the electronic pi states of high-quality epitaxial graphene layers on a Ni(111) surface. In this system the electron binding energy of the pi states shows a strong dependence on the magnetization reversal of the Ni film. The observed extraordinarily large energy shift up to 225 meV of the graphene-derived pi band peak position for opposite ma...
متن کاملMagnetic Hyperfine Fields at Se Adatoms on Ni Surfaces.
Magnetic hyperfine fields for Se on Ni(111) and Ni(001) surfaces were measured with the perturbed angular correlation technique. The results are jBhfj 2.7s3d T for Se on Ni(111) and jBhfj 0.8s3d T for Se on Ni(001) at 90 K. These values of magnetic hyperfine fields of an adatom deviate drastically from the known bulk value of Bhf 15 T. The surface site positions of the probe atoms are dis...
متن کاملSURFACE MAGNETISM OF THE CLEAN Ni (111) SURFACE AND OF A Ni MONOLAYER ON Cu (111)
Results of highly precise all-electron local spin density FLAPW calculations on (i) a close-packed 7-layer Ni (111) slab and (ii) a p (1 x 1) Ni monolayer on Cu (111) are presented. For Ni ( I l l ) , we find an enhancement of the magnetic moment for both the surface (to 0.63 pB) and sub-surface Ni layers (from a center layer value of 0.58 pB). In contrast, a slight decrease of the magnetic hyp...
متن کامل