Peter Jacobson

It was great hosting Katerina as a visiting PhD student in Brisbane! Congratulations on your accomplishment! 🎉🎉

Reducing TLS loss in tantalum CPW resonators using titanium sacrificial layers We demonstrate a substantial reduction in two-level system loss in tantalum coplanar waveguide resonators fabricated on high-resistivity silicon substrates through the use of an ultrathin titanium sac...

New preprint: A little titanium can help clean up tantalum for better superconducting resonators arxiv.org/abs/2601.16369

In the 1930s, this quantum mechanical pioneer faced obstacles that still confront women in physics today.

👉 Read the full story: theconversation.com/who-was...

Scientists realize superconductivity in traditional semiconducting material – Physics World Superconducting germanium could find application in a new generation of quantum devices

Nice write up on our work in Physics World! physicsworld.com/a/scientists...

Nvidia Expands Into Quantum Computing And Fusion Power In this week’s edition of The Prototype, we look at why AI models struggle with finance, a revolutionary superconducting discovery, Pac-Man and more.

A new edition of my emerging tech newsletter, The Prototype, is here. What's inside:

💻 Nvidia has announced a bunch of new emerging tech partnerships

🏦 Why AI models can't handle investment banking

⚡ Scientists built a superconducting semiconductor

And more!

www.forbes.com/sites/the-pr...

Germanium superconductor could help build reliable quantum computers A new type of germanium superconductor could allow classical and quantum chips to be built into one device, creating better and more reliable quantum computers.

A new type of germanium superconductor could allow classical and quantum chips to be built into one device, creating better and more reliable quantum computers.

Superconductivity in substitutional Ga-hyperdoped Ge epitaxial thin films - Nature Nanotechnology The epitaxial growth of hyperdoped Ga:Ge films and trilayer heterostructures by molecular-beam epitaxy yield superconductivity with a critical temperature of 3.5 K and may enable quantum functionaliti...

Excited this is finally out! Great collab with Javad Shabani’s group at NYU, DFT magic from @carlaverdi.bsky.social, synchrotron sorcery @ansto.bsky.social by Julian Steele www.nature.com/articles/s41...

Thanks to Peter Jacobson (@spmqt.bsky.social) from the University of Queensland for visiting and showing us his team's exciting research on the epitaxial growth of hyperdoped Ga:Ge superconductors. #SPMQT_Lab

#seminar

Join our group in Brisbane! Two year postdoc focused on STM of quantum materials #scijobs #physics #postdoc uq.wd3.myworkdayjobs.com/en-US/uqcare... UQ Careers

3/ DFT calculations show that the Fermi level shifts deeply into the valence band and implicates states near the R point in superconductivity. And helps explain the sudden onset of superconductivity with doping. Interestingly, the bands in this part of the Brillouin Zone are quite flat.

2/ We demonstrate that MBE can be used to grow highly Ga doped superconducting Ge on semiconducting Ge. We used x-ray absorption to identify the short range order around Ga dopants and x-ray scattering to detect a subtle lattice distortion due to the differing size of the dopants.

Superconductivity in Epitaxial SiGe for Cryogenic Electronics Introducing superconductivity into group IV elements by doping has long promised a pathway to introduce quantum functionalities into well-established semiconductor technologies. The non-equilibrium hy...

1/ Our new preprint is up on arXiv: “Superconductivity in Epitaxial SiGe for Cryogenic Electronics”
arxiv.org/abs/2412.15421

This work is in collaboration with Javad Shabani’s group at NYU. Julian Steele led the synchrotron experiments, Patrick Strohbeen the MBE growth, @carlaverdi.bsky.social DFT

Cover of the "Solid state Physics" textbook by Ashcroft and Mermin. (Source|: Wikipedia)

#PhysicsFactlet:
The "Ashcroft/Mermin Project"
I will try to (likely very slowly) make one or more visualization per chapter of "Solid State Physics" by Ashcroft and Mermin, with the hope that they will be useful to people teaching/learning solid state Physics.
1/

Text tile which reads: The 47th Condensed Matter and Materials Meeting. 4th-7th February 2025, University of Queensland. Abstract deadline 30 November.

📅Abstracts are due soon for the 2025 Condensed Matter and Materials Meeting. Join us in beautiful Brisbane to discuss recent advances in condensed matter research in a relaxed and collegial atmosphere. More details: www.aip.org.au/CMM-Conference

#Physics #Conference #Australia #UQ #QUT

Great starter pack! My group does STM and materials for quantum technology in Australia