Dr. Jan Gui-Hyon Dreiser

Jan Dreiser

Microscopy and Magnetism Group

Paul Scherrer Institut
Forschungsstrasse 111
5232 Villigen PSI

Jan Dreiser is a staff scientist at the Swiss Light Source. After obtaining his Vordiplom in physics from the Technische Universität München (Germany) and a Diplôme d'Etudes Approfondies (MSc equivalent) in physics from the Université Joseph Fourier, Grenoble (France) he was awarded his PhD from ETH Zürich (Switzerland) in 2007 on the laser spectroscopy of single spins in individual semiconductor quantum dots. In postdoctoral fellowships at the Universität Freiburg (Germany) and at the Paul Scherrer Institut he worked on molecular magnets mainly based on lanthanide centers. He was awarded a SNSF Ambizione grant hosted at the EPF Lausanne and at PSI. During this time he studied, among other systems, surface-adsorbed single-molecule magnets in the monolayer range by scanning tunneling microscopy and X-ray absorption spectroscopy.

We are working on upgrading X-Treme, while the SLS is being upgraded to SLS 2.0. X-Treme is a beam line specialized in soft X-ray magnetic circular dichroism at high magnetic fields and low temperatures.

Our main research activities are toward magnetic thin films and monolayers. Objects of our studies include molecular magnets and single-molecule magnets, nanoparticles, magnetic 2D materials and metal-organic networks. We are striving to develop suitable material stacks, nanostructures and techniques to enable quantum information processing and ultra high density data storage devices. Specifically, we are interested in what factors govern the longitudinal relaxation and transverse (coherence) times of spins in engineered nanostructures and layered molecule-inorganic stacks. Furthermore, we are investigating optically addressable materials, in which its electronic and/or magnetic states can be manipulated and/or read out by UV/visible/NIR light irradiation.

We use a number of experimental techniques with a focus on X-ray absorption spectroscopy (XAS), X-ray magnetic circular dichroism (XMCD) and scannning tunneling microscopy (STM). Furthermore, we make use of SQUID magnetometry, Fourier-transform infrared spectroscopy, laser spectroscopy, inelastic neutron scattering, (THz-)electron paramagnetic resonance. 

The full publication list can be downloaded here or viewed in the DORA-PSI repository here (only PSI related publications).

Charge Transfer and Orbital Reconstruction at an Organic–Oxide Interface M. Caputo, M. Studniarek, E. B. Guedes, L. Schio, K. Baiseitov, N. Daffé, N. Bachellier, A. Chikina, G. Di Santo, A. Verdini, A. Goldoni, M. Muntwiler, C. Piamonteze, L. Floreano, M. Radovic, J. Dreiser, Nano Letters 23, 11211 (2023).

Understanding the Superior Stability of Single-Molecule Magnets on an Oxide Film  M. Studniarek, C. Wäckerlin, A. Singha, R. Baltic, K. Diller, F. Donati, S. Rusponi, H. Brune, Y. Lan, S. Klyatskaya, M. Ruben, A.P. Seitsonen, J. Dreiser, Advanced Science 6, 1901736 (2019).

Giant Hysteresis of Single-Molecule Magnets Adsorbed on a Nonmagnetic Insulator  C. Wäckerlin, F. Donati, A. Singha, R. Baltic, S. Rusponi, K. Diller, F. Patthey, M. Pivetta, Y. Lan, S. Klyatskaya, M. Ruben, H. Brune, J. Dreiser, Advanced Materials 28, 5195-5199 (2016).

Magnetic Remanence in Single Atoms  F. Donati, S. Rusponi, S. Stepanow, C. Wäckerlin, A. Singha, L. Persichetti, R. Baltic, K. Diller, F. Patthey, E. Fernandes, J. Dreiser, Z. Sljivancanin, K. Kummer, C. Nistor, P. Gambardella, H. Brune, Science 352, 318-321 (2016). 

Direct Observation of a Ferri-to-Ferromagnetic Transition in a Fluoride-Bridged 3d-4f Molecular Cluster
J. Dreiser, K. S. Pedersen, C. Piamonteze, S. Rusponi, Z. Salman, Md. E. Ali, M. Schau-Magnussen, C. Aa. Thuesen, S. Piligkos, H. Weihe, H. Mutka, O. Waldmann, P. Oppeneer, J. Bendix, F. Nolting, H. Brune, Chemical Science 3, 1024 (2012).

Quantum-Dot Spin-State Preparation with Near-Unity Fidelity
M. Atatüre, J. Dreiser, A. Badolato, A. Högele, K. Karrai, A. Imamoğlu, Science 312, 551 (2006).

Optical Control of Quantum Dot-Spin States (Book Chapter),  M. Atatüre, J. Dreiser, A. Badolato, A. Imamoğlu, Semiconductor Quantum Bits, Edited by O. Benson and F. Henneberger, World Scientific Publishing Co. (2008).