Degrees and Appointments
- Dipl. Chem. ETH 1997, ETH
- D. Phil. Oxon 2001, Oxford
- Postdoctoral Fellow 2001-2004, JILA (National Institute of Standards and Technology and University of Colorado, Boulder)
- Professor of Physics 2015 -
Awards and Honors
- Swiss National Science Foundation Postdoctoral Fellow, 2001-2003
- Greendale Senior Scholar, Merton College, Oxford, 1998-2001
- 3M Non-Tenured Faculty Awardee, 2005-2007
- College of Science Distinguished Early Career Teaching Award, 2014
Research in LabMontiTM is focused on obtaining a detailed understanding of interfacial processes in 2D materials and in organic semiconductors. 2D materials such as graphene, MoS2 and others, are atomically thin extended crystals that exhibit profoundly new properties that can be readily tailored. Organic semiconductors are a class of molecules that provide widely tunable electronic properties once assembled into thin films. Both materials classes are drawing significant attention for novel electronic and optoelectronic devices such as photovoltaic cells, thermoelectrics or spin valves, and in quantum information processing.
For devices made of either organic semiconductors or 2D materials, interfaces with electrodes and other materials play a crucial role in determining device properties. This is because charges or spins are always collected across an interface, forming an important bottleneck in any electronic device. Interfaces are however intrinsically complex environments, and as a consequence, the development of high-performance solar cells or other electronic devices presents a major challenge, and new avenues to understand and control such interfaces need to be developed.
Research in LabMontiTM seeks to elucidate the chemistry and physics of charges in 2D materials and in organic semiconductors at interfaces on the short length- and time-scales present in electronic and spintronic devices. We probe these interfaces with advanced steady-state and ultrafast photoelectron spectroscopies in our lab and at synchrotrons, and study self-assembly using scanned probe microscopy under highly controlled conditions. We have some of the world's most unique capabilities to investigate electronic structure on very small length-scales, and can combine this with very high time-resolution to develop mechanistic insight into energy and charge-flow across interfaces. We use insights gained from this work also to understand quantum transport at the ultimate size limit.
Some of our most recent publications:
Controlling the spin-texture of topological insulators by rational design of organic molecules, S. Jakobs, A. Narayan, B. Stadtmueller, A. Droghetti, I. Rungger, Y.S. Hor, S. Klyatskaya, D. Jungkenn, J. Stoeckl, M. Laux, O.L.A. Monti, M. Aeschlimann, R.J. Cava, M. Ruben, S. Mathias, S. Sanvito, M. Cinchetti, Nano Lett., 15, 6022-6029 (2015)
Disrupted Attosecond Charge Carrier Delocalization at a Hybrid Organic/Inorganic Semiconductor Interface, D.A. Racke, L.L. Kelly, H. Kim, P. Schulz, A. Sigdel, J.J. Berry, S. Graham, D. Nordlund, and O.L.A. Monti, J. Phys. Chem. Lett. 6, 1935-1941 (2015)
The Importance of Gap States for Energy Level Alignment at Hybrid Interfaces, D.A. Racke, L.L. Kelly and O.L.A. Monti, J. Elec. Spect. Rel. Phen., 204A, 132-139 (2015)
Integer Charge Transfer and Hybridization at an Organic Semiconductor / Conductive Oxide Interface, M. Gruenewald, L.K. Schirra, P. Winget, M. Kozlik, P.F. Ndione, A.K. Sigdel, J.J. Berry, R. Forker, J.-L. Bredas, T. Fritz, and O.L.A. Monti, J. Phys. Chem. C 119, 4865-4873 (2015)
Interplay of Local and Global Interfacial Electronic Structure of a Strongly Coupled Dipolar Organic Semiconductor, N. Ilyas and O.L.A. Monti, Phys. Rev. B, 90, 125435 (2014)
Tailoring Electron-Transfer Barriers at Zinc Oxide / C60 Fullerene Interfaces, P. Schulz, L.L. Kelly, P.D. Winget, H. Li, H. Kim, P.F. Ndione, A.K. Sigdel, J.J. Berry, S. Graham, J.-L. Bredas, A. Kahn and O.L.A. Monti, Adv. Func. Mater., 24, 7381-7389 (2014)
Defect-Driven Interfacial Electronic Structure at an Organic / Inorganic Semiconductor Heterojunction, P.D. Winget, L.K. Schirra, D. Cornil, H. Li, V. Coropceanu, P.F. Ndione, A.K. Sigdel, D.S. Ginley, J.J. Berry, J. Shim, H. Kim, B. Kippelen, J.-L. Bredas and O.L.A. Monti, Adv. Materials 26, 4711-4716 (2014)
Spin-dependent trapping of electrons at spinterfaces, S. Steil, N. Grossmann, M. Laux, A. Ruffing, D. Steil, M. Wiesenmayer, S. Mathias, O.L.A. Monti, M. Cinchetti, M. Aeschlimann, Nature Physics 9, 242-247 (2013)2D materials transition metal dichalcogenides organic semiconductors interfaces ultrafast spectroscopy