PD Dr. Jens Wiebe
Leitender Wissenschaftlicher Mitarbeiter
Scanning Probe Methods
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Curriculum Vitae
| Current status | Permanent scientific staff at the Department of Physics, Universität Hamburg, Germany Main research areas artificial spin arrays coupled to itinerant electron systems, topological superconductors, Majorana bound states, topological insulators, Fe-based superconductors, dilute magnetic semiconductors, spin-resolved scanning tunneling spectroscopy |
| 2020 | Habilitation in the field of Physics "Artificial Atomic-Spin Arrays on Solid Surfaces." and Private-Dozentur at Universität Hamburg |
| 2003 - 2005 | Postdoctoral research fellow in the group of Prof. Dr. R. Wiesendanger at the Department of Physics, Universität Hamburg, Germany |
| 1998 - 2003 | PhD-thesis at the Department of Physics, Universität Hamburg, Germany group of Prof. Dr. R. Wiesendanger: “Development of a 300mK-UHV-STM with 14T magnet and investigation of a strongly disordered 2DES.” |
| 1996 - 1997 | Diploma-thesis at the Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Germany group of Prof. Dr. G. zu Putlitz “Photoacoustical spectroscopy via resonant detection of second sound in superfluid 4He.” |
| 1993 - 1997 | Studies of physics, Ruprecht-Karls-Universität Heidelberg, Germany |
| 1991 - 1993 | Studies of physics and mathematics, Vordiplom, RWTH Aachen, Germany |
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Research
In recent years, a new paradigm for the forecast of real solid state quantum systems has emerged, known as the quantum simulation or quantum emulation. Instead of using computation models, the idea is to emulate a complex solid state material by the experimental study of another more easily tailorable quantum system, which is tuned to have similar properties, e.g., spin sizes, mutual magnetic couplings, and lattice structure as the material we would like to understand in the first place. The ability of tuning the parameters of such tailorable quantum systems and to experimentally study the changes in its electron phases under such variations might enable to predict how complex material systems have to be changed in order to show desired properties.
My main research interest for the past ~10 years has been towards the realization of such quantum spin emulators using spins of atoms adsorbed to the surface of a solid state material with a well known band structure of the itinerant electrons, which are artificially arranged to chains or lattices. Due to the geometry of the surface, such artificial atomic-spin arrays are inherently suited for the emulation of 1D and 2D problems. Since, here, electron and spin correlations are increasingly pronounced, most interesting and unexpected physics is believed to emerge in such low-dimensional cases. Most recently, my research is focused on the investigation of topological p-wave gapped electron bands and Majorana bound states in chains of magnetic atoms assembled on the surface of conventional elementary superconductors.
Another application of artificial atomic-spin arrays is in the area of the so-called atomic nanospintronics. Here, the aim is to study the possibilities of making use of the spins, rather than of the charge, of electrons bound to atoms for the realization of elements of information technology, i.e. bits and gates. The use of the entity of the spin, which obeys the laws of quantum mechanics, as a bit of information might allow for novel very efficient, so-called quantum computation schemes.
Teaching
| SoSe2021 |
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| WiSe20/21 |
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| since 2019 | Lectures in Magnetism and Physics of Surfaces (Nanostrukturphysik II), for Master of Physics and Master of Nanoscience studies, (every summer term). |
| 2012 - 2014 | Practical courses in Scanning Tunneling Microscopy, (Praktikum Nanostrukturphysik), for Bachelor of Nanoscience studies, (approx. 4 groups each year). |
| 2009 - 2018 | Course-accompanying exercises in Solid State Physics (Physik IV), for Bachelor of Physics studies, (every summer term). |
| since 2008 | Course-accompanying exercises in Quantum and Statistical Physics (Physik III), for Bachelor of Physics studies, (every winter term). |
| since 2004 | Practical courses in Scanning Tunneling Microscopy, (Physikalisches Praktikum für Fortgeschrittene), for Bachelor of Physics studies, (approx. 4 to 8 groups each year). |
Track Record
Researcher ID: C-7580-2018
ORCID: 0000-0003-1668-6142
Conferences (recent and upcoming)
| Oct 2021 | 7th International Conference on Superconductivity and Magnetism (ICSM2021), Milas-Bodrum, Turkey (invited) |
| Sept 2021 | DPG Meeting of the Condensed Matter Section (SKM21), virtual (invited) |
| Aug 2021 | Molecular Foundry 2021 User Meeting, virtual (invited) |
| Mai 2021 | Atomic-scale quantum materials colloquium, virtual (invited) |
| Mar 2021 | DPG Spring Meeting of the Surface Science Division (invited) |
Funding and Projects (current and recent)
| 2019-2023 | DFG | SFB 925-B09, Gepris 170620586 2 PhD positions (4 years, together with S. Krause and R. Wiesendanger) Controlled dynamics in crafted spin arrays coupled to itinerant electron baths |
| 2013-2021 | DFG | SPP 1666, Gepris 237526155 1 PhD position (8 years, together with Ph. Hofmann) Spin-resolved STS, ARPES, and XMCD of magnetically doped topological insulator heterostructures |
| 2010-2017 | DFG | SFB 668-A01, Gepris 13002249 3 PhD positions (6 years, together with K. von Bergmann and R, Wiesendanger) Magnetic spectroscopy of individual atoms, chains, and nanostructures |
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