Thomas Frederiksen

@lma-unizar.bsky.social @dipcehu.bsky.social @nanogune.bsky.social #Ikerbasque

Systematic modulation of charge and spin in graphene nanoribbons on MgO - Nature Communications Precise control of charge and spin states in quantum dots is often challenging. Here, the authors show systematic manipulation of the electron occupation in graphene nanoribbons laying on MgO.

Out in Nat. Commun. Led by David Serrate (Zaragoza) the exp. team shows controlled electron filling in GNRs on ultrathin MgO/Ag(001). Electropositive surface = up to 19 extra electrons! Honoured to contribute some theory.
🔗 www.nature.com/articles/s41...
#Graphene #QuantumMaterials #STM #Spintronics

The Topological Photonics 2025 (Topophoto25) workshop is taking place these days at Miramar Palace as part of DIPC´s workshops program. Check all the information here:

topophoto2025.dipc.org

#uik

How a salt layer shapes electron behaviour in a single molecule Salt, far from being a passive bystander, actively reshapes the molecule’s structure and decides where extra electrons reside

Researchers studied a copper-phthalocyanine molecule on a thin layer of salt. They discovered that the salt actively reshapes the molecule’s structure and decides where extra electrons reside. 

Thanks for this nice write-up on our recent #PRL. Really appreciate it!

Book launch of "Las Guerras Nucleares" by Eduardo Jesús Sánchez Cascón happening now!
www.bubok.es/libros/28144...

On-Surface Synthesis of a Ferromagnetic Molecular Spin Trimer Triangulenes are prototypical examples of open-shell nanographenes. Their magnetic properties, arising from the presence of unpaired π electrons, can be extensively tuned by modifying their size and shape or by introducing heteroatoms. Different triangulene derivatives have been designed and synthesized in recent years thanks to the development of on-surface synthesis strategies. Triangulene-based nanostructures with polyradical character, hosting several interacting spin units, can be challenging to fabricate but are particularly interesting for potential applications in carbon-based spintronics. Here, we combine pristine and N-doped triangulenes into a more complex nanographene, TTAT, predicted to possess three unpaired π electrons delocalized along the zigzag periphery. We generate the molecule on a Au(111) surface and detect direct fingerprints of multiradical coupling and high-spin state using scanning tunneling microscopy and spectroscopy. With the support of theoretical calculations, we show that its three radical units are localized at distinct parts of the molecule and couple via symmetric ferromagnetic interactions, which result in a S = 3/2 ground state, thus demonstrating the realization of a molecular ferromagnetic Heisenberg spin trimer.

Ferromagnetic Molecular Spin Trimer pubs.acs.org/doi/10.1021/... #PiSky

Fully funded PhD and Postdoc positions in Physics currently available in my group @dublincityuni.bsky.social on the interplay of two-dimensional materials, quantum transport and AI.

PhD: www.dcu.ie/physics/theo...
Postdoc: www.euraxess.ie/jobs/349999

#graphene #quantum #phd #jobfairy

Today #DIPCseminars 👇

📌 The weird and wonderful world of catalysis
👨‍🔬 Michele Parrinello, Italian Institute of Technology @iitalk.bsky.social 
🗓️ May 27, 12:30
🏫 DIPC Josebe Olarra Seminar Room

Prof. Rainer Blatt, IQOQI Innsbruck, speaking now for a general audience on "100 Years of Quantum Physics – And that´s just the Beginning" in @tabakalera.bsky.social. #quantum

SYNTOM workshop (SYNthetic TOpological Matter), to be held in the Benasque Science Center in Spain, August 31st, 2025 - September 06th, 2025
benasque.org/2025stm/

By controlling charge transfer to a single Cu-phthalocyanine molecule, we show that substrate polarization enhances and alters the Jahn-Teller effect — driving two excess electrons into one of two degenerate frontier orbitals despite Coulomb repulsion.

Paper out in #PhysRevLett with Moritz @gr221.bsky.social, Laerte @laertepatera.bsky.social, Felix, Jascha, Andrea @uniregensburg.bsky.social
journals.aps.org/prl/abstract...
@dipcehu.bsky.social @uniinnsbruck.bsky.social @apsphysics.bsky.social #STM #ChargeTransfer #JahnTellerEffect #ManybodyModel

TheBad Honnef Physics School on "Ultracold Quantum Matter“ is to be held at the Physics Center in Bad Honnef, Germany during the period August 10 – 16, 2025
www.dpg-physik.de/veranstaltun...

The ATRAE program from @ageinves.bsky.social aims "to facilitate the incorporation of consolidated research talent, of recognised international prestige"

Given the circumstances, this may be of particular interest for academics from the US

www.aei.gob.es/en/news/agen...

Today in Physical Review Letters (journals.aps.org/prl/abstract...), control of Andreev reflection via a single-molecule orbital, together with Lorenz Meyer, Nicolas Néel, and Jörg Kröger

"Quantum mechanics is the operating system of the universe", Antonio Corcoles, IBM Quantum

Ready to learn about #quantum algorithms at a joint Basque-Bordeaux event in #Baiona. @dipcehu.bsky.social @univbordeaux.bsky.social #BasQ

As from today, the conference on Artificial Intelligence for Advanced Materials (#AI4AM2025) will be bringing together over 200 experts in #AI applied to the development of #advancedmaterials from industry and research centres
📌Donostia / San Sebastián April 08-10 2025
👀 https://tinyurl.com/4h5chaz4

Quantum simulators for exploring hitherto inaccessible phenomena

⚛️DIPC (T. Grass, D. Bercioux) Ikerbasque @icfonians.bsky.social, ICREA, ETH Zurich , École Centrale de Lyon, @tu-dortmund.bsky.social
📝Reviews of Modern Physics (2025)

✨Irakurri albistea, lea la noticia👇
👀https://tinyurl.com/mtjesn3s

PhD defense happening now by Leonard Edens: "Spin and charge control of single molecules for atomic scale quantum coherence" @nanogune.bsky.social @upvehu.bsky.social

I believe so :)

If I get my own telescope one day, I'd love to reproduce his observations!

Thanks, I'll keep this in mind. Btw, did you know Ole Rømer used observations of Jupiter's moons to estimate the speed of light? He was only like 25% off... 350 years ago.

Sounds exciting. Is the observatory open to the public?

"School on Quantum Dynamics of Matter, Light and Information", at ICTP Aug 18th - Sept. 5th 2025.
indico.ictp.it/event/10860/

Triangulene dimers linked by one or two para-biphenyl units were synthesized on Au(111). STM, non-contact AFM, and scanning tunneling spectroscopy measurements reveal an open-shell singlet magnetic exchange coupling for Dimer 1 (ES-T=15 mV), influenced by the dihedral angles of the two para-biphenyl units. Dimers 2′ with an ES-T=6.6 mV were obtained from a more flexible precursor equipped with one para-biphenyl linker.

What's the only thing better than one triangulene? Two triangulenes!
◀️🟰▶️ Check out our latest work just published in @angewandtechemie.bsky.social with @imdeananociencia.bsky.social 🔬 We look into the influence of dihedral angles on magnetic coupling 🧲

👇
onlinelibrary.wiley.com/doi/10.1002/...

New WSS research center for molecular quantum systems The University of Basel and the University of Bern are setting up a new research center to enable the construction of superconducting quantum units. The Werner Siemens Foundation is supporting the pro...

Thanks to the Werner Siemens-Stiftung to support the WSS Research Center for Molecular Quantum Systems (molQ) targeting the construction of superconducting quantum units with molecules on superconductors. @nanolino-unibas.bsky.social @unibas.ch @unibern.bsky.social

www.unibas.ch/en/News-Even...

Happening now: "Atomistic simulations of electronic structure and coherent transport in 1D & 2D carbon-based nanoarchitectures", PhD defense by Xabier Diaz de Cerio #upv_ehu