I’m very happy to let you know that our paper on two novel, lowest-pressure hydrides mentioned in the post before got accepted and published in npj Compuational Materials. You can look it up here: https://www.nature.com/articles/s41524-022-00801-y.
As always, please don’t hesitate to get in touch if you have questions or want further information!
I’m very excited to let you know that we have just compiled a manuscript about our recent work on novel ternary hydrides. Using ab-initio state-of-the-art methods we predict two novel ternary hydrides, BaSiH8 and SrSiH8, that are dynamically stable down to very low pressures of 3 and 27 GPa, respectively, with considerable superconducting temperatures (71 and 126K), thus representing new record-holders with respect to low-pressure superhydrides. We also introduce a method to estimate the lowest pressure of synthesis, based on the calculation of the enthalpy barriers protecting the BaSiH8 Fm-3m structure from decomposition at various pressures. This kinetic pressure threshold is sensibly higher than the one based on dynamic stability, but gives a much more rigorous limit for synthesizability.
You can find a preprint version of our work here: arXiv:2112.02131
Don’t hesitate to get in touch in case you have questions or want more information!
I just wanted to let you know very quickly that the accepted PRL article mentioned below has now been published and that it was awarded the Editors‘ suggestion highlighting. You can find it here.
Of course, if you have any questions or want more information, feel free to get in touch with me.
I was given the honour to contribute to the Journal of Physics special issue article „The 2021 Room-Temperature Superconductivity Roadmap„, together with some of the most renowned scientists in this field. The article covers a wide range of different perspectives on the topic, from experimental points of view to theoretical concepts and methods. An accepted version of the article is available here, and I will let you know as soon as the final version has been published.
In a collaborative work with the experimental group of Prof. Wahl at the University of St. Andrews we investigated the effect of helium on the spin-polarization of the tunneling current and magnetic contrast in spin-polarized Scanning Tunneling Microscopy. We show that the time-averaged spin-polarization of the tunneling current can be suppressed by the presence of helium in the junction due to the dynamics of the probe particle. Using the bias voltage, the probe particle can be ejected in a controlled wayfrom the tunneling junction, thus enabling control of the average spin polarization of the current. We further demonstrate that the probe particle can be used to determine exchange interactions between the tip and sample in a scanning tunneling microscope, complementing direct force measurements.
I’m happy to let you know that this work has been accepted for publication in Phys. Rev. Lett. and I will post a link to the published version as soon as it is available.
In a collaborative work (PRB 104, L020511) with Lilia Boeri, Simone di Cataldo, and Wolfgang von der Linden, we predict a new ternary hydride, LaBH8, which is the first example of a conventional superconductor with a Tc = 126 K, i.e. exceeding the boiling point of N2 (77 K), that remains dynamically stable down to ∼ 40 GPa. We are really excited about this as the possibility of stabilizing a superhydride at lower pressures represents a giant leap towards hydride-based superconductivity at room pressure, extending the current parterre of high-Tc superconductors beyond cuprates and iron pnictides and chalcogenides.
Feel free to get in touch with me in case you have questions about this work!
I just wanted to let you know that the final publication version of our contribution to the Emerging Leanders 2020 of J. Phys.: Condens. Matter titled Superconductivity and strong anharmonicity in novel Nb–S phases is now available in its final form.
Also, my joined project with Prof. Wahl’s group at the St. Andrews University titled Strain-Stabilized (π, π) Order at the Surface of Fe1+xTe has been published in Nano Letters.
In case you have questions or want further information, please don’t hesitate to get in touch with me.
all the best!
I have been working on a joint project with Peter Wahl and his group at St. Andrews, where we explored the tuning of the ground state of FeTe by uniaxial strain. We find that uniaxial strain leads to the formation of a new phase in the surface layer that exhibits a markedly distinct appearance from that of unstrained FeTe, in particular the emergence of a (pi,pi) charge order and short-range magnetic order.
This is a first step towards a strain-driven control of quantum phases and we are excited that our work has been accepted by Nano Letters for publication. An accepted version of the manuscript with all the details can be found here.
Also, feel free to get in touch if you have any questions or in case you want more information.
Take care and stay save!
I hope you are doing fine and that you can keep your spirits up in these difficult times. I wanted to share some exciting news with you: Back in 2020 I was invited by the editorial board of the Journal of Physics: Condensed Matter to contribute to their special issue „Emerging Leaders 2020“. Feeling quite honored to be considered for this special issue, Roman and I submitted a work on „Superconductivity and strong anharmonicity in novel Nb-S phases“ in which we explore the binary phase diagram of Nb-S up to high pressures of 300GPa and investigate superconducting properties and anharmonic behaviour of novel phases, in particular Nb2S.
Our paper passed peer-review and is currently available as an „accepted manuscript“ here:
I just wanted to let you know that our article Electronic, vibrational, and electron–phonon coupling properties in SnSe2 and SnS2 under pressure has now been published as an Advance Article in the Journal of Materials Chemistry C. Give it a read if you are interested and have the time, and in case there are any questions, don’t hesitate to drop me or Prof. Margine a line.
Take care and stay safe!