Ultrafast Dynamics in Condensed Matter group

Below you find a list of current group members and openings. Enthusiastic thesis or internship students are always welcome to contact us directly and to enquire for opportunities. We strive after building a group where diversity is a core aspect, and we would be particularly happy to help you jump on board with us if you belong to an underrepresented category within physics.

Principal Investigator
Stefano Bonetti, Ph.D.
Stefano Bonetti

Stefano Bonetti obtained a Ph.D. in Materials Physics in 2011 from KTH - Royal Institute of Technology, Stockholm, Sweden with a dissertation on spin dynamics driven by spin transfer torque. He was then a postdoctoral fellow in the research group led by Jo Stöhr and Hermann Dürr at Stanford University and at SLAC National Accelerator Laboratory, investigating ultrafast magnetic dynamics and imaging synchrotron and free-electron-laser X-ray radiation (2012 – 2014). In 2014 he joined as a Researcher the Department of Physics at Stockholm University. Since then, he has been awarded one of the International Career Grants (Swedish Research Council, Marie Curie Action), for the project "THz spin control" (2015-2019, 800kEUR), and a European Research Council Starting Grant for the project "Understanding the speed limits of magnetism", (2017-2022, 2MEUR). Since January 2017, Stefano has a tenured position (Associate Professor equivalent) at Stockholm University, where he leads the group of Ultrafast Dynamics in Condensed Matter. In 2017, Stefano was selected as one of nine Wallenberg Academy Fellow in Natural Sciences by the Royal Academy of Science, with the project “Ultrafast Coherent Control of Quantum Materials” (2018 – 2023, 800 kEUR). In 2018, he was awarded a grant from the Swedish Research Council for the project "Nonlinear phononics" (2019 - 2023, 360 kEUR). In 2019 he obtained funding from the Knut and Alice Wallenberg foundation for the project "Dynamic Quantum Matter" (2020 – 2025, 2.8 MEUR), together with Alexander Balatsky (lead applicant), Jens Bardarson, Emil Bergholtz and Annica Black-Schaffer, as well as from the Swedish Research Council for the project: Detection of Dark Matter Axions in the Sky and in the Lab (2020 – 2024, 1.8 MEUR), together with Hiranya Peris (lead applicant), Alexander Balatsky, Jan Conrad, Jón Gudmundsson and Frank Wilczek.



Postdocs
Martina Basini, Ph.D.
Martina Basini

Martina obtained her Ph.D. in Condensed Matter from Milano University, in Milano, Italy in 2017, with the thesis “Effect of the hollow topology on the local spin dynamics in iron oxide magnetic nanoparticles”. From March 2017 to July 2018 she was a postdoctoral fellow in the group of Alessandro Lascialfari in Milano. During her Ph.D. Martina worked in international facilities gaining expertise on Muon Spin Resonance (PSI, Switzerland), X-Ray Magnetic Dichroism (Bessy II, Germany) and Neutron Spettroscopy (ILL, Grenoble). In the same period, she developed simulation tools to study the local dynamics in different spins systems in collaboration with Yves Gossuin (University of Mons, Belgium) and with Miguel Novak (Universidad Federal do Rio de Janeiro, Brazil). She investigates the ultrafast dynamics driven by coherent terahertz radiation in quantum materials.

Tien Tien Yeh, Ph.D.
Tien Tien Yeh

Tien-Tien Yeh obtained her Ph.D. in Electrophysics from the National Chiao Tung University, Taiwan (R.O.C) in January 2020 with a dissertation on the "Ultrafast dynamics of Dirac fermions studied by ultra-broadband mid-infrared pump-probe spectroscopy". During her Ph.D, she developed a mid-infrared pump-probe spectroscopy setup using sub-10 fs (sub-cycle) MIR pulses generated by air-plasma and chirped-pulse up-conversion for detection, under the supervision of Prof. Chih-Wei Luo, Prof. Takayoshi Kobayashi, and collaborator Prof. Takao Fuji (Institute for Molecular Science, Japan). From March 2020 to May 2021, Tien-Tien was a postdoctoral fellow in Dr. Pin-Hui Lin’s group at National Synchrotron Radiation Research Center, Taiwan, and worked on developments of 2D μm-resolved spatially-separated ultrafast time-resolved spectroscopy and high harmonic generation based time resolved angle resolved photoemission spectroscopy (ARPES). Apart from research, she is interested in music, painting and Kendo.

Vivek Unni, Ph.D.

Vivek obtained his M.Sc. (Physics) with specialization in photonics and B.Sc. (Hons.) in physics, from Sri Sathya Sai Institute of Higher Learning, India. He completed his master’s thesis in the topic “No cloning Theorem” under the supervision of Prof. Debendranath Sahoo. He has been working as Junior Research Fellow in the Multimodal Microscopy project funded by Department of Science and Technology, Government of India from July 2016. His other interests include Science education, World Cinema, Cricket, Football and International affairs. Vivek started his Ph.D. in the group in April 2017 and graduated in September 2021, with the thesis: Ultrafast spin, lattice, and electron dynamics in thin metallic films: in the terahertz, near-infrared, and extreme ultraviolet regimes



Ph.D. students
Nanna Zhou Hagström

Nanna obtained both her B.Sc and M.Sc in Physics from Université Pierre et Marie Curie in Paris, and has a B.Sc in Mathematics from Stockholm University. During her master she did two internships at the Stanford Synchrotron Radiation Lightsource (SSRL) in California. During Spring 2016 she studied mackinawite, an iron sulfide that adapts to oxidative impurities, through X-ray absorption spectroscopy at SSRL, under the supervision of John Bargar and Vincent Noël. In 2017 she spent 5 months under the supervision of Michael Toney (SSRL) and Ana Flavia Nogueira (University of Campinas, Brazil) studying hybrid organic-inorganic mixed halide perovskite, a solar absorber, through synchrotron X-ray diffraction. She is pursuing her Ph.D. in ultrafast imaging of spin dynamics at the nanoscale.

Carlo Alberto Brondin

Carlo Alberto obtained his bachelor degree in Chemistry at the Ca’ Foscari University of Venice, Italy, in 2018. During his thesis, he synthesized and characterized lanthanide-doped core-shell nanoparticles, with the aim of tuning upconversion luminescent properties for optical thermometry applications. He started his Master degree in Science and Technology of Bio and Nanomaterials at the Ca’ Foscari University of Venice, Italy. He joined the group for his master thesis focused on the study of the magnetic properties in thin films coupled to Dirac materials.

Kasturie Jatkar

Kasturie obtained her B.Sc (Research) in Physics from Shiv Nadar University, India. She studied the band gap modulation in two-dimensional vdW-heterostructures for tunable optoelectronic devices using density functional theory for her undergraduate thesis. She moved to Uppsala to pursue a Master’s degree in Material Physics at Uppsala University in 2018. Apart from being in the lab, she likes to teach, read, play musical instruments, and try her hand at photography or calligraphy.

Nupur Khatu

Nupur obtained his Integrated Bachelor of Science - Master of Science (BS-MS) dual degree in Physics from the Indian Institute of Science Education and Research (IISER) Bhopal, India. During the 5-year programme, he carried out a summer internship at the Bhabha Atomic Research Center (BARC), Mumbai. His M.Sc. project thesis, under the guidance of Dr. Amit Khare, was based on strain engineering in perovskite thin films, with an aim to study the effect of strain and oxygen partial pressure on pulsed laser deposited epitaxial thin films. He synthesized oxygen-deficient thin films of perovskites and performed x-ray diffraction and SQUID-VSM measurements on the films to characterize the structural and magnetic properties. At present, he is pursuing his Ph.D. degree in our group. His broad area of research is the investigation of magnetic and structural dynamics in condensed matter using nonlinear X-ray techniques.



Master and bachelor thesis candidates


Interested in doing your thesis project in our group?
Take a look at the "Thesis projects" tab.




Alumni


Postdocs
Matthias Hudl, Ph.D.
Matthias Hudl


Former senior postdoc, Matthias is now Laser Scientist at the Department of Physics of Stockholm University

Debanjan Polley, Ph.D.
Debanjan Polley


Former postdoc, Debanjan is now postdoc at the University of California Berkeley

Matteo Pancaldi, Ph.D.


Former postdoc and visiting Ph.D. student, Matteo is now a Research Scientist at the DIPROI beamline at FERMI@Elettra

Lucile Soumah, Ph.D.
Debanjan Polley


Former postdoc, Lucile is now R&D Scientist at IRnova AB




Ph.D. students
Valentino Scalera
Valentino Scalera


Valentino spent six months in our group and he is now a postdoc at the Free University of Bolzano, Italy

Kumar Neeraj


Neeraj started his Ph.D. in the group in March 2017 and graduated in September 2021, with the thesis: Terahertz spin dynamics in metallic thin film ferromagnets




Master thesis students
Lukas Alber


R&D intern at Northvolt AB, Stockholm, Sweden.




Bachelor thesis students
Markus Tollet


Technical Intern at Ericsson AB, Stockholm, Sweden.

Rebecca Elovsson


Master medical physics student at Stockholm University.

Sara Kullström


Master geophysics student
at Uppsala University.

Anders Törnblom


Master medical physics student
at Stockholm University.

Stefan Sigurdsson


Master physics student
at Stockholm University.





Student Interns
Jean-Rémi Chatroux


Jean-Rémi did an internship in our group while student at the engineering school ENSICAEN of Caen, France.

Vincent Bourinet


Graduated with Valedictorian distinction from the University of Bordeaux, France. Now aerospace engineering master student and part time employee at Airbus

Raphael Fournet


Graduated from ENSICAEN in Caen, France.

Martin Pavelka


Master physics student at Uppsala University.

Florence Jones


Undergraduate student
at Loughborough University (UK).