Recherche

Afficher tous les résultats pour

Accueil

Personne

Klaus Kern

À propos
Confidentialité
Mentions légales

Graph Chatbot

Publications associées (299)

Functionalization of Open Two-Dimensional Metal-Organic Templates through the Selective Incorporation of Metal Atoms

Klaus Kern, Sebastian Stepanow, Christopher Seiji Kley

Surface-confined molecular networks can serve as templates to steer the adsorption and organization of secondary ligands, metal atoms, and clusters. Here, the incorporation of Ni atoms and clusters into open two-dimensional robust metal-organic templates s ...

Amer Chemical Soc2013

Temperature and magnetic field dependence of a Kondo system in the weak coupling regime

Klaus Kern, Markus Ternes, Uta Schlickum, Peter Wahl

The Kondo effect arises due to the interaction between a localized spin and the electrons of a surrounding host. Studies of individual magnetic impurities by scanning tunneling spectroscopy have renewed interest in Kondo physics; however, a quantitative co ...

Nature Publishing Group2013

Spatially resolved photocurrents in graphene nanoribbon devices

Klaus Kern, Kannan Balasubramanian, Stephan Rauschenbach, Marko Burghard, Adarsh Singh Sagar, Thomas Dufaux

We present here a scanning photocurrent microscopy study of individual graphene nanoribbons, revealing pronounced photocurrent responses close to the nanoribbon/metal contacts. The magnitude of the corresponding photocurrent signal was found to be directly ...

Amer Inst Physics2013

Phase Engineering of Subwavelength Unidirectional Plasmon Launchers

Klaus Kern, Moritz Esslinger

Wiley-V C H Verlag Gmbh2013

Valley-polarized massive charge carriers in gapped graphene

Klaus Kern, Marko Burghard, Eva Carmen Peters

The lifting of the fourfold degeneracy of the zeroth Landau level in graphene under high magnetic fields has been the subject of numerous experimental studies, and attributed to various mechanisms such as pure spin splitting, spin splitting combined with s ...

Amer Physical Soc2013

Efficient Charge Extraction out of Nanoscale Schottky Contacts to CdS Nanowires

Klaus Kern, Marko Burghard, Thomas Dufaux

Charge recombination dynamics in semiconductor nanostructures is of vital importance for photovoltaic or photodetector device applications. We use local photocurrent measurements to explore spatially separated drift- and diffusion-currents close to the edg ...

American Chemical Society (ACS)2012

Miniature active damping stage for scanning probe applications in ultra high vacuum

Klaus Kern, Maximilian Assig, Carola Strasser

Scanning probe microscope (SPM) experiments demand a low vibration level to minimize the external influence on the measured signal. We present a miniature six-degree of freedom active damping stage based on a Gough-Stewart platform (hexapod) which is posit ...

2012

In-Plane Magnetic Anisotropy of Fe Atoms on Bi2Se3(111)

Klaus Kern, Violetta Sessi

The robustness of the gapless topological surface state hosted by a 3D topological insulator against perturbations of magnetic origin has been the focus of recent investigations. We present a comprehensive study of the magnetic properties of Fe impurities ...

2012

Electric field effect in graphite crystallites

Klaus Kern, Kannan Balasubramanian, Marko Burghard, Adarsh Singh Sagar

Graphite is a highly anisotropic crystal with a quasi-two-dimensional electronic structure exhibiting high intrinsic charge carrier mobility. Here, we investigate the effect of an electric field on the resistance of individual graphite crystallites with a ...

AIP American Institute of Physics2012

Anisotropic spin gaps in BiAg2-Ag/Si(111)

Klaus Kern, Marco Grioni, Emmanouil Frantzeskakis, Alberto Crepaldi

We present a detailed analysis of the band structure of the root 3 x root 3 R 30 degrees BiAg2/Ag/Si(111) trilayer system by means of high resolution Angle Resolved Photoemission Spectroscopy (ARPES). BiAg2/Ag/Si(111) exhibits a complex spin-polarized elec ...

2012

Contact Resistance and Megahertz Operation of Aggressively Scaled Organic Transistors

Klaus Kern, Frederik Sebastian Ante, Hagen Klauk

2012

Two-dimensional magnetotransport in Bi2Te2Se nanoplatelets

Klaus Kern, Marko Burghard, Pascal Gehring

Single-crystalline Bi2Te2Se nanoplates with thicknesses between 8 and 30 nm and lateral sizes of several micrometers were synthesized by a vapour-solid growth method. Angle-dependent magnetoconductance measurements on individual nanoplates revealed the pre ...

AIP American Institute of Physics2012

Crystalline Inverted Membranes Grown on Surfaces by Electrospray Ion Beam Deposition in Vacuum

Klaus Kern, Stephan Rauschenbach, Ralf Thomas Weitz, Theresa Lutz, Nicha Thontasen, Gordon Rinke, Giovanni Costantini

Wiley2012

Role of pseudospin in quasiparticle interferences in epitaxial graphene probed by high-resolution scanning tunneling microscopy

Klaus Kern

Pseudospin, an additional degree of freedom emerging in graphene as a direct consequence of its honeycomb atomic structure, is responsible for many of the exceptional electronic properties found in this material. This paper is devoted to providing a clear ...

Amer Physical Soc2012

A Close Look at Proteins: Submolecular Resolution of Two- and Three-Dimensionally Folded Cytochrome c at Surfaces

Klaus Kern, Stephan Rauschenbach, Nicha Thontasen, Gordon Rinke

Imaging of individual protein molecules at the single amino acid level has so far not been possible due to the incompatibility of proteins with the vacuum environment necessary for high-resolution scanning probe microscopy. Here we demonstrate electrospray ...

American Chemical Society (ACS)2012

Stereoselectivity and electrostatics in charge-transfer Mn- and Cs-TCNQ(4) networks on Ag(100)

Klaus Kern, Sebastian Stepanow, Tzu-Chun Tseng, Nasiba Abdurakhmanova, Andrea Floris

Controlling supramolecular self-assembly is a fundamental step towards molecular nanofabrication, which involves a formidable reverse engineering problem. It is known that a variety of structures are efficiently obtained by assembling appropriate organic m ...

Nature Publishing Group2012

Giant Ambipolar Rashba Effect in the Semiconductor BiTeI

Helmuth Berger, Philippe Bugnon, Klaus Kern, Marco Grioni, Oleg Yazyev, Luca Moreschini, Alberto Crepaldi, Simon Karl Moser, Gabriel Albert Autes, Naunidh Singh Virk, Cédric Tournier-Colletta

We observe a giant spin-orbit splitting in the bulk and surface states of the noncentrosymmetric semiconductor BiTeI. We show that the Fermi level can be placed in the valence or in the conduction band by controlling the surface termination. In both cases, ...

Amer Physical Soc2012

Background-free imaging of plasmonic structures with cross-polarized apertureless scanning near-field optical microscopy

Klaus Kern, Moritz Esslinger

We present advances in experimental techniques of apertureless scanning near-field optical microscopy (aSNOM). The rational alignment procedure we outline is based upon a phase singularity that occurs while scanning polarizers around the nominal cross-pola ...

2012

Charge transport gap in graphene antidot lattices

Klaus Kern, Marko Burghard, Eva Carmen Peters

Graphene antidot lattices (GALs) offer an attractive approach to band-gap engineering in graphene. Theoretical studies indicate that the size of the opened gap is sensitive to the shape, size, and architecture of the nanoholes introduced into the graphene ...

Amer Physical Soc2012

Bonding and Charge Transfer in Metal-Organic Coordination Networks on Au(111) with Strong Acceptor Molecules

Klaus Kern, Sebastian Stepanow, Alexander Langner, Nan Jiang

The geometric and electronic structure of two structurally similar metal organic networks grown on the Au(111) surface is investigated by scanning tunnelling microscopy (STM) and spectroscopy (STS) combined with density functional theory (DFT) calculations ...

Amer Chemical Soc2012

Page 8 sur 15