Barth Group

Research is focused on the exploration of interfacial and molecular nanosystems and quantum materials, notably including the design and engineering of functional metal-organic architectures. 


Atomistic investigation of quantum materials and phenomena

Complex electron confinement pattern in a 2D-chiral kagomé superlattice obtained via molecular self-assembly on the Ag(111) surface.

We aim at a detailed characterization of the electronic and geometric structure of solid state, molecular and hybrid quantum materials, notably affording direct insights by advanced scanning probe microscopy and spectroscopy tools. Key issues are the control of surfaces & thin films of quantum materials emanating from the effects of deposition of atoms and molecules self-assembling in distinct architectures, and seeeing with utmost spatial resolution precisely what is happening to electronic and structural properties at the atomic scale. 


Selected publications

  • Tunable quantum dot arrays formed from self-assembled metal-organic networks Physical review letters 106, 026802 (2011)
  • Supramolecular gratings for tuneable confinement of electrons on metal surfaces. Nature Nanotechnology 2, 99 (2007).

Tailoring molecular spin systems

Fe atom embedded in a carboxylate matrix as element of a two-dimensional high-spin transition metal array at a metal interface

Our research explores potential molecular qubits based on coordination compounds anchored at interfaces or embedded in tailored nanoscale environments, such as metallosupramolecular networks with rare-earth centers or tailored metal-organic systems, including, e.g., d-f hybrid architectures or heterometallic ring systems. An important issue for tackling molecule-based quantum information technologies is notably the (supra)molecular organization in well-defined arrays and complex architectures, as well as the bottom-up fabrication of tailored single-atom quantum magnets. 


Selected publications

  • Quasicrystallinity expressed in two-dimensional coordination networks Nature Chem. 8, 657 (2016). 
  • Supramolecular control of the magnetic anisotropy in two-dimensional high-spin Fe arrays at a metal interface Nature Mater. 8, 189 (2009). 

Prof. Johannes Barth

Address:

TU Munich

Department of Physics

James-Franck-Str. 1

Garching, 85747, Germany

Mail:

jvb(at)tum.de 

Group webpage: 

www.e20.ph.tum.de/startseite/