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Harald Brune

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Publications associées (117)

Surface-assisted assembly of 2D metal-organic networks that exhibit unusual threefold coordination symmetry

Harald Brune, Klaus Kern, Uta Schlickum

Wiley-VCH Verlag GmbH2007

Magnetism of Fe clusters and islands on Pt surfaces

Harald Brune, Klaus Kern, Stefano Rusponi

Clusters and islands of Fe atoms have been prepared by noble gas buffer layer assisted growth as well as by standard molecular beam epitaxy on Pt substrates. Xe buffer layers have been utilized to promote the formation of compact, relaxed Fe clusters with ...

2006

Nucleation of ordered Fe islands on Al2O3/Ni3Al(111)

Harald Brune, Stefano Rusponi, Anne Lehnert, Régis Decker

Scanning tunneling microscopy (STM) has been used to investigate the nucleation and stability of iron clusters on the Al2O3/Ni3Al (111) surface as a function of coverage and annealing temperature. We show that atomic beam deposition of iron leads to hexago ...

2006

Orbital selective overlayer-substrate hybridization in a Pb monolayer on Ag(111)

Thomas Gloor, Harald Brune, Klaus Kern, Marco Grioni, Stephan Fedrigo, Frédéric Mila, Daniela Pacilè

The electronic structure of a Pb overlayer on Ag(111) has been studied by angle-resolved photoemission spectroscopy. We identify three p bands. While the p(xy) bands are sharp and closely resemble the corresponding bands of a free-standing Pb layer, the p( ...

2006

Assembly and probing of spin chains of finite size

Harald Brune

American Association for the Advancement of Science2006

Structure and magnetism of atomically thin Fe layers on flat and vicinal Pt surfaces

Harald Brune, Klaus Kern, Pietro Gambardella, Stefano Rusponi, Violetta Sessi

Ultrathin Fe films on Pt substrates have been investigated under ultrahigh vacuum conditions by scanning tunneling microscopy, low energy electron diffraction, magneto-optical Kerr effect, x-ray magnetic circular dichroism measurements, and Kerr microscopy ...

2006

Giant Spin-Polarization and Magnetic Anisotropy of Nanostructures at Surfaces

Harald Brune

2006

Equilibrium island-size distribution in one dimension

Harald Brune, Klaus Kern, Pietro Gambardella

We derive an analytical expression for the size distribution of monoatomic wires in the framework of a one-dimensional lattice gas model at thermodynamic equilibrium. The theoretical results are compared with the size distribution of one-dimensional Ag wir ...

2006

Coexistence of one- and two-dimensional supramolecular assemblies of terephthalic acid on Pd(111) due to self-limiting deprotonation

Harald Brune, Klaus Kern, Sylvain Clair, Marta Canas Ventura

The adsorption of terephthalic acid [C6H4(COOH)(2), TPA] on a Pd(111) surface has been investigated by means of scanning tunneling microscopy (STM), x-ray photoelectron spectroscopy, and near-edge x-ray absorption fine structure spectroscopy under ultrahig ...

2006

Paramagnetic Mn impurities on Ge and GaAs surfaces

Harald Brune, Pietro Gambardella

Individual Mn impurities deposited on Ge(100), Ge(111), and GaAs(110) substrates present magnetic moments significantly larger compared to the average Mn magnetization in bulklike Ga1-xMnxAs and MnxGe1-x dilute magnetic semiconductors. The Mn magnetic mome ...

2005

High tunnel magnetoresistance in spin-polarized scanning tunneling microscopy of Co nanoparticles on Pt(111)

Nicolas Weiss, Harald Brune, Stefano Rusponi

We employ variable-temperature spin-polarized scanning tunneling microscopy in constant current mode to read the magnetic state of monodomain cobalt nanoparticles on Pt(111). In order to avoid stray fields we use in situ prepared antiferromagnetically (Cr) ...

2005

X-ray ferromagnetic resonance spectroscopy

Harald Brune, Radivoje Popovic, Giovanni Boero, Pietro Gambardella, Stefano Rusponi

We present a method to measure continuous-wave ferromagnetic resonance (FMR) spectra based on the core-level absorption of circularly polarized x rays. The technique is demonstrated by using a monochromatic x-ray beam incident on an yttrium-iron-garnet sam ...

2005

Uniform magnetic properties for an ultrahigh-density lattice of noninteracting Co nanostructures

Nicolas Weiss, Harald Brune, Stefano Rusponi

We report on the magnetic properties of two-dimensional Co nanoparticles arranged in macroscopically phase-coherent superlattices created by self-assembly on Au(788). Our particles have a density of 26 Tera/in(2) (1 Tera=10(12)), are monodomain, and have u ...

2005

Magnetic anisotropy from single atoms to large monodomain islands of Co/]Pt(111)

Nicolas Weiss, Harald Brune, Pietro Gambardella, Stefano Rusponi

By studying the magnetic behavior of self-assembled Co islands on a single-crystal metal surface, Pt(111), we show how the magnetic anisotropy evolves from isolated atoms to monolayer islands and films. Single Co adatoms are found to have a giant magnetocr ...

2005

Radial elasticity of multiwalled carbon nanotubes

Harald Brune, Stephan Fedrigo, Ismaël Palaci

We report an experimental and a theoretical study of the radial elasticity of multiwalled carbon nanotubes as a function of external radius. We use atomic force microscopy and apply small indentation amplitudes in order to stay in the linear elasticity reg ...

2005

STM study of terephthalic acid self-assembly on Au(III): Hydrogen-bonded sheets on an inhomogeneous substrate

Harald Brune, Klaus Kern, Sylvain Clair

The adsorption and ordering of the molecule terephthalic acid (TPA), 1,4-benzene-dicarboxylic acid C6H4-(COOH)(2), on the reconstructed Au(111) surface has been studied in situ in ultrahigh vacuum by scanning tunneling microscopy (STM) at room temperature. ...

American Chemical Society2004

Controlled deposition of size-selected silver nanoclusters

Harald Brune, Wolfgang Harbich, Klaus Kern, René Monot

Variable-temperature scanning tunneling microscopy was used to study the effect of kinetic cluster energy and rare-gas buffer layers on the deposition process of size-selected silver nanoclusters on a platinum(111) surface. Clusters with impact energies of ...

American Association for the Advancement of Science1996

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