Electronic structure of two-dimensional magnetic alloys: c(2×2) Mn on Cu(100) and Ni(100)

Rader, O.; Gudat, W.; Carbone, C.; Vescovo, E.; Blügel, Stefan; Kläsges, R.; Eberhardt, W.; Wuttig, Matthias; Redinger, Josef; Himpsel, F. J.

doi:10.1103/physrevb.55.5404

Cited by 92 publications

(103 citation statements)

References 54 publications

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“…This is consistent with total energy calculations of Rader et al, 6 who found the ferromagnetic state to be the equilibrium state. Until now, this could not be confirmed experimentally.…”

Section: A the C"2ã2… Mncuõcu"100… Surface Alloysupporting

confidence: 81%

“…One important experiment in this context was carried out by Rader et al, 6 who determined the exchange splitting of Mn by photoemmission combined with inverse photoemmission to 5.5 eV, while we determined the theoretical exchange splitting to 2.5 eV. This raises the question whether the calculated STM image is an artifact of the underlying theoretical approximations.…”

Section: A the C"2ã2… Mncuõcu"100… Surface Alloymentioning

confidence: 99%

“…The growth [1][2][3][4] and the structural, electronic, and magnetic properties of this system were investigated by quantitative I/V low-energy electron diffraction 5 ͑LEED͒, photoemission, 6,7 and inverse photoemission 6 ͑BIS͒, soft-x-ray absorption ͑SXA͒ and emission [8][9][10] ͑SXE͒, and magnetic circular dicroism 11 ͑CMXD͒. From this we can conclude that c(2ϫ2)MnCu/Cu(100) is structurally welldefined and stable over a large temperature range, with a large magnetic moment for Mn.…”

Section: Introductionmentioning

confidence: 99%

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Interpreting STM images of the MnCu/Cu(100) surface alloy

et al. 2000

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c(2ϫ2)MnCu/Cu (100) is an ordered two-dimensional surface alloy that exhibits a checkerboard arrangement of Mn and Cu atoms on the Cu͑100͒ surface. Mn buckles outwards by 0.3 Å with respect to Cu and in all previous scanning tunneling microscopy ͑STM͒ experiments only one chemical species was imaged which was assumed to be Mn. We analyze the STM results by first-principles calculations based on the densityfunctional theory and show that Cu rather than Mn is imaged, while indeed Mn is imaged as single Mn impurities at Cu͑100͒. We explain this result in terms of the formation of Mn states bridging over the Cu atoms. These Mn states are characteristic for Mn in a c(2ϫ2)MnCu surface alloy. Missing Mn atoms break this bridging bond and the surrounding Cu atoms are imaged as depressions.

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“…This is consistent with total energy calculations of Rader et al, 6 who found the ferromagnetic state to be the equilibrium state. Until now, this could not be confirmed experimentally.…”

Section: A the C"2ã2… Mncuõcu"100… Surface Alloysupporting

confidence: 81%

Section: A the C"2ã2… Mncuõcu"100… Surface Alloymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Interpreting STM images of the MnCu/Cu(100) surface alloy

et al. 2000

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“…This is a new interesting problem! Fortunately, Freeman and Alden et al have studied the work functions of magnetic metals Fe, Co and Cr [19][20][21][22]. The obtained results raise our conjectures of modulating the work function by the spin.…”

Section: Introductionsupporting

confidence: 57%

A novel spin modulation of work function for C adsorbed Cr/Fe(001) metal gate

Zhong¹,

Xu²,

Cheng³

et al. 2012

AIP Advances

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Work functions and magnetic moments of C adsorbed Cr/Fe(001) surfaces with different C coverages θ and magnetic alignments (parallel or antiparallel) between Cr and Fe atom moments are investigated using first-principles methods based on density functional theory. The calculated results reveal that the spin configuration plays a significant role in determining the work function of the systems. The work functions of the systems with parallel states are evidently larger than those with antiparallel states. Moreover, for θ≤0.5 ML, with increasing value of θ, the work function increases from 4.23 eV to 5.13 eV for antiparallel states and from 4.47 eV to 5.44 eV for parallel states. While for θ>0.5 ML, the work function decreases with increasing value of θ. It can be also found that, for θ≤0.5 ML, the smaller the Cr and Fe magnetic moments are, the lower the Fermi energy EF is and the larger the work functions of the systems are. Based on analysis and discussion, we conclude that the changes of the work functions and magnetic moments are mainly determined by those of Fermi level and density of state (DOS) induced by the spin polarization, the electron transfer and the surface structure. Our work strongly suggests that controlling the magnetic states is a promising way for modulating the work function of magnetic metal gate

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“…Mn is an ideal choice as electronic band structure calculations have shown that the Mn atoms possess almost a 100% spin polarization at the Fermi level. 8,9 II. EXPERIMENTS Three samples were grown with the nominal structure, Si͑100͒/Ta ͑200 Å͒/Co ͑50 Å͒/Cu ͑xÅ͒ / CuMn ͑20 Å͒/Al ͑15 Å͒, with x = 0 , 5, and 10 Å, at room temperature by magnetron sputter deposition in a high-vacuum chamber.…”

Section: Introductionmentioning

confidence: 99%

The spin polarization of Mn atoms in paramagnetic CuMn alloys induced by a Co layer

Abes

Atkinson

Tanner

et al. 2009

Journal of Applied Physics

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Using the surface, interface, and element specificity of x-ray resonant magnetic scattering in combination with x-ray magnetic circular dichroism, we have spatially resolved the polarization, and hence the spin accumulation in Mn high susceptibility material in close proximity to a ferromagnetic layer. The magnetic polarization of Mn and Cu 3d electrons in paramagnetic CuMn layers is detected in a Co/Cu(x)/CuMn structure for varying copper layer thicknesses (x). The size of the Mn and Cu L2-3-edge dichroism shows a decrease in the polarization for increasing copper thickness indicating the dominant interfacial nature of the Cu and Mn spin polarization. The Mn polarization appears to be much higher than that of Cu. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3063065]\u

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Electronic structure of two-dimensional magnetic alloys: c(2×2) Mn on Cu(100) and Ni(100)

Cited by 92 publications

References 54 publications

Interpreting STM images of the MnCu/Cu(100) surface alloy

Interpreting STM images of the MnCu/Cu(100) surface alloy

A novel spin modulation of work function for C adsorbed Cr/Fe(001) metal gate

The spin polarization of Mn atoms in paramagnetic CuMn alloys induced by a Co layer

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