Bonding geometry of Mn-wires on the Si(100)(2 × 1) surface

Nolph, Christopher A.; Liu, H.; Reinke, Petra

doi:10.1016/j.susc.2011.04.017

Cited by 16 publications

(16 citation statements)

References 29 publications

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“…But they all fail to reproduce a striking asymmetry of the Mn chains observed in filled state STM images [ Fig. 1(a)] [20,24,25]. Here, we combine STM, noncontact atomic force microscopy (NC AFM) and density functional theory (DFT) modeling to unveil their microscopic structure.…”

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confidence: 99%

Structure of Self-Assembled Mn Atom Chains on Si(001)

et al. 2015

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Mn has been found to self-assemble into atomic chains running perpendicular to the surface dimer reconstruction on Si(001). They differ from other atomic chains by a striking asymmetric appearance in filled state scanning tunneling microscopy (STM) images. This has prompted complicated structural models involving up to three Mn atoms per chain unit. Combining STM, atomic force microscopy, and density functional theory we find that a simple necklacelike chain of single Mn atoms reproduces all their prominent features, including their asymmetry not captured by current models. The upshot is a remarkably simpler structure for modeling the electronic and magnetic properties of Mn atom chains on Si(001).

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confidence: 99%

Structure of Self-Assembled Mn Atom Chains on Si(001)

et al. 2015

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“…32,33 By depositing the capping layer prior to annealing, we enabled interactions between the surface Mn layer and the deposited Si that leads to the formation of a MnSi-B20 phase. By annealing the sample prior to deposition of the cap, we drive the Mn into the preferred subsurface sites, which leads to the subsequent formation of the B2-like phase with the addition of the Si-cap.…”

Section: Xafs Experiments and Analysismentioning

confidence: 99%

Local structure and magnetic properties of B2- and B20-like ultrathin Mn films grown on Si(001)

et al. 2012

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The structural and magnetic properties of ultrathin Mn layers deposited onto Si(001) by molecular beam epitaxy (MBE) at low temperature are reported. X-ray absorption fine structure (XAFS) studies reveal that the structure of the silicide layer that forms depends on the growth temperature of the capping layer. A capping layer grown at 200 ºC on 0.35 monolayer (ML) Mn results in a metastable MnSi phase with a B2-like (CsCl) structure, whereas a cap grown at room temperature on 0.5 ML followed by annealing at 200 °C produces a lower coordinated MnSi phase with a B20-like structure. Increasing the Mn thickness from 0.5 to 4 monolayers does not trigger a structural transformation but drives the structure closer to MnSi-B20. The sample with B2-like structure has the largest Mn magnetic moment of 0.33μ B /Mn at T=2 K, and a Curie temperature T C above 250 K.MnSi-B20 layers showed lower moments and much lower T C 's, in-line with those reported for MnSi-B20 thin films.2

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“…A quick survey of the literature provides us with numerous examples: Mg/Si(557) 59 , Si/Si(001) 60 , Mn/Si(001) [61][62][63][64][65] , CoSi 2 /Si 66 , Ga/Si(001) [67][68][69][70] , Sr/Si(111) 71 and Sr/Si(001) 72 , Ag+Au/Si(557), 44 Ir/Si(001) 73 , and so on.…”

Section: Introductionmentioning

confidence: 99%

Modeling 1D structures on semiconductor surfaces: synergy of theory and experiment

Vanpoucke

2014

J. Phys.: Condens. Matter

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Atomic scale nanowires attract enormous interest in a wide range of fields. On the one hand, due to their quasi-one-dimensional nature, they can act as a experimental testbed for exotic physics: Peierls instability, charge density waves, and Luttinger liquid behavior. On the other hand, due to their small size, they are of interest for future device applications in the micro-electronics industry, but also for applications regarding molecular electronics. This versatile nature makes them interesting systems to produce and study, but their size and growth conditions push both experimental production and theoretical modeling to their limits. In this review, modeling of atomic scale nanowires on semiconductor surfaces is discussed focusing on the interplay between theory and experiment. The current state of modeling efforts on Pt-and Au-induced nanowires on Ge (001) is presented, indicating their similarities and differences. Recently discovered nanowire systems (Ir, Co, Sr) on the Ge(001) surface are also touched upon. The importance of scanning tunneling microscopy as a tool for direct comparison of theoretical and experimental data is shown, as is the power of density functional theory as an atomistic simulation approach. It becomes clear that complementary strengths of theoretical and experimental investigations are required for successful modeling of the atomistic nanowires, due to their complexity.

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Bonding geometry of Mn-wires on the Si(100)(2 × 1) surface

Cited by 16 publications

References 29 publications

Structure of Self-Assembled Mn Atom Chains on Si(001)

Structure of Self-Assembled Mn Atom Chains on Si(001)

Local structure and magnetic properties of B2- and B20-like ultrathin Mn films grown on Si(001)

Modeling 1D structures on semiconductor surfaces: synergy of theory and experiment

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