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Harald Brune

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Publications associées (117)

Structural and electronic properties of the Bi/Au(110)-1x4 surface

Harald Brune, Marco Grioni, François Patthey, Oleg Yazyev, Marina Pivetta, Alberto Crepaldi, Gabriel Albert Autes, Cédric Tournier-Colletta

We report on the structural and electronic properties of the Bi/Au(110)-1 x 4 surface, by combining scanning tunneling microscopy, angle-resolved photoemission spectroscopy, and first-principles calculations. The analysis of the precursor 1 x 8 moire struc ...

American Physical Society2013

Quantifying residual hydrogen adsorption in low-temperature STMs

Harald Brune, François Patthey, Donat Fabian Natterer

We report on low-temperature scanning tunneling microscopy observations demonstrating that individual Ti atoms on hexagonal boron nitride dissociate and adsorb hydrogen without measurable reaction barrier. The clean and hydrogenated states of the adatoms a ...

Elsevier2013

Two Distinct Phases of Bilayer Graphene Films on Ru(0001)

Harald Brune, Marco Grioni, Stefano Rusponi, Anne Lehnert, Daniela Pacilè, Quentin Dubout, Emmanouil Frantzeskakis, Donat Fabian Natterer

By combining angle-resolved photoemission spectroscopy and scanning tunneling microscopy we reveal the structural and electronic properties of multilayer graphene on Ru(0001). We prove that large ethylene exposure allows the synthesis of two distinct phase ...

Amer Chemical Soc2012

An Endohedral Single-Molecule Magnet with Long Relaxation Times: DySc_{2}N@C_{80}

Harald Brune, Stefano Rusponi, Jan Gui-Hyon Dreiser

The magnetism of DySc2N@C80 endofullerene was studied with X-ray magnetic circular dichroism (XMCD) and a magnetometer with a superconducting quantum interference device (SQUID) down to temperatures of 2 K and in fields up to 7 T. XMCD shows hysteresis of ...

2012

Atomic-scale engineering of magnetic anisotropy of nanostructures through interfaces and interlines

Philipp Buluschek, Harald Brune, Stefano Rusponi, Géraud Moulas, Sergio Vlaic

The central goals of nanoscale magnetic materials science are the self-assembly of the smallest structure exhibiting ferromagnetic hysteresis at room temperature, and the assembly of these structures into the highest density patterns. The focus has been on ...

Nature Publishing Group2012

X-ray Magnetic Circular Dichroism (XMCD) Study of a Methoxide-Bridged Dy^III-Cr^III Cluster Obtained by Fluoride Abstraction from cis-[Cr^III F_2 (phen)_2]^+

Harald Brune, Stefano Rusponi, Jan Gui-Hyon Dreiser

An isostructural series of dinuclear chromium(III)-lanthanide(III) clusters is formed by fluoride abstraction of cis-CrF2(phen)(2) by Ln(3+) resulting in LnF(3) and methoxide-bridged Cr-Ln clusters (Ln = Nd (1), Tb (2), Dy (3)) of formula [Cr-III(phen ...

Amer Chemical Soc2012

Effect of the TiO2 Reduction State on the Catalytic CO Oxidation on Deposited Size-Selected Pt Clusters

Harald Brune, Wolfgang Harbich, Simon Bonanni

The catalytic activity of deposited Pt-7 clusters has been studied as a function of the reduction state of the TiO2(110)-(1 x 1) support for the CO oxidation reaction. While a slightly reduced support gives rise to a high catalytic activity of the adpartic ...

2012

Optimizing long-range order, band gap, and group velocities for graphene on close-packed metal surfaces

Harald Brune, Stefano Rusponi, Donat Fabian Natterer

We compare different growth methods with the aim of optimizing the long-range order of a graphene layer grown on Ru(0001). Combining chemical vapor deposition with carbon loading and segregation of the surface layer leads to autocorrelation lengths of 240 ...

2012

Isolated Pd Sites on the Intermetallic PdGa(111) and PdGa($\bar 1$ $\bar 1$ $\bar 1$) Model Catalyst Surfaces

Harald Brune, Jan Prinz, Roland Widmer, Daniele Passerone

Wiley-Blackwell2012

X-Treme beamline at SLS: X-ray magnetic circular and linear dichroism at high field and low temperature

Harald Brune, Stefano Rusponi, Thomas Schmidt, Jan Gui-Hyon Dreiser

X-Treme is a soft X-ray beamline recently built in the Swiss Light Source at the Paul Scherrer Institut in collaboration with Ecole Polytechnique Federale de Lausanne. The beamline is dedicated to polarization-dependent X-ray absorption spectroscopy at hig ...

Wiley-Blackwell2012

Electronic states of moiré modulated Cu films

Harald Brune, Stefano Rusponi, Anne Lehnert

We examined by low-energy electron diffraction and scanning tunneling microscopy the surface of thin Cu films on Pt(111). The Cu/Pt lattice mismatch induces a moire modulation for films from 3 to about 10 ML thickness. We used angle-resolved photoemission ...

Iop Publishing Ltd2012

Ring State for Single Transition Metal Atoms on Boron Nitride on Rh(111)

Harald Brune, François Patthey, Donat Fabian Natterer

The low-temperature adsorption of isolated transition metal adatoms (Mn, Co, and Fe) onto hexagonal boron nitride monolayers on Rh(111) creates a bistable adsorption complex. The first state considerably weakens the hexagonal boron nitride- (h-BN-) substra ...

Amer Physical Soc2012

Interface-confined mixing and buried partial dislocations for Ag bilayer on Pt(111)

Harald Brune, Daniele Passerone

The trigonal strain-relief pattern formed by an Ag bilayer on Pt(111) is a prominent example for dislocation networks and their use as nanotemplates. However, its atomic structure has not been solved. Combining scanning tunneling microscopy, low-energy ion ...

Amer Physical Soc2012

Complex Interplay and Hierarchy of Interactions in Two-Dimensional Supramolecular Assemblies

Harald Brune, Marta Canas Ventura

In order to address the interplay of hydrogen bonding, dipolar interactions, and metal coordination, we have investigated the two-dimensional mono- and bicomponent self-assembly of three closely related diaminotriazine-based molecular building blocks and a ...

American Chemical Society2011

Surface-Confined Self-Assembly of Di-carbonitrile Polyphenyls

Harald Brune, Régis Decker, Uta Schlickum

This Feature Article reports on the controlled formation and structure-functionality aspects of vacuum-deposited self-assembled organic and metal-organic networks at metal surfaces using ditopic linear and nonlinear molecular bricks, namely di-carbonitrile ...

Wiley-Blackwell2011

Self-Assembled Nanometer-Scale Magnetic Networks on Surfaces: Fundamental Interactions and Functional Properties

Harald Brune, Klaus Kern, Pietro Gambardella, Stefano Rusponi, Anne Lehnert, Sebastian Stepanow, Sergio Vlaic

Nanomagnets of controlled size, organized into regular patterns open new perspectives in the fields of nanoelectronics, spintronics, and quantum computation. Self-assembling processes on various types of substrates allow designing fine-structured architect ...

Wiley-Blackwell2011

Magnetocrystalline anisotropy energy of Co and Fe adatoms on the (111) surfaces of Pd and Rh

Harald Brune, Pietro Gambardella, Stefano Rusponi, Anne Lehnert, Géraud Moulas, Markus Etzkorn

We performed a combined theoretical and experimental investigation of the orbital magnetism and magnetocrystalline anisotropy of isolated Co and Fe adatoms on Pd(111) and Rh(111). Theoretical calculations of the spin and orbital moments are based on ab ini ...

2010

Magnetic anisotropy of Fe and Co adatoms and Fe clusters magnetically decoupled from Ni_{3}Al(111) by an alumina bilayer

Harald Brune, Stefano Rusponi, Anne Lehnert, Markus Etzkorn

The magnetic properties of individual Fe and Co atoms as well as of small Fe clusters adsorbed on two atomic layers of Al2O3 grown on Ni3Al(111) have been investigated by x-ray absorption spectroscopy and x-ray magnetic circular dichroism. We find ratios o ...

2010

Nitrogen fixation at passivated Fe nanoclusters supported by an oxide surface: Identification of viable reaction routes using density functional calculations

Harald Brune, Alfredo Pasquarello, Zeljko Sljivancanin

Using density-functional calculations, we investigate the possibility of ammonia synthesis at supported Fe nanoclusters along catalytic routes closely resembling those in biological nitrogen fixation. To achieve similar catalytic conditions as at the activ ...

2009

High resolution in situ magneto-optic Kerr effect and scanning tunneling microscopy setup with all optical components in UHV

Philipp Buluschek, Nicolas Weiss, Harald Brune, Stefano Rusponi, Matthias Treier, Anne Lehnert

A surface magneto-optic Kerr effect (MOKE) setup fully integrated in an ultrahigh vacuum chamber is presented. The system has been designed to combine in situ MOKE and scanning tunneling microscopy. Magnetic fields up to 0.3 T can be applied at any angle i ...

2009

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