Metadata
Title
News
Category
general
UUID
51455b3ec1524aa4a0931097ec6d103d
Source URL
http://bernardi.caltech.edu/news/index.html
Parent URL
http://bernardi.caltech.edu/
Crawl Time
2026-03-23T05:20:50+00:00
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# News

**Source**: http://bernardi.caltech.edu/news/index.html
**Parent**: http://bernardi.caltech.edu/

- We show a machine learning method to compress phonon interactions and accelerate their calculation. See the paper in  [Physical Review Letters](https://journals.aps.org/prl/abstract/10.1103/nmgj-yq1g)  and the story from Caltech News:  [New AI Technique Unravels Quantum Atomic Vibrations in Materials](https://www.caltech.edu/about/news/new-ai-technique-unravels-quantum-atomic-vibrations-in-materials).  9-16-25
- We solve the polaron problem in real materials by developing first-principles diagrammatic Monte Carlo calculations. Read the article in  [Nature Physics](https://www.nature.com/articles/s41567-025-02954-1)  and the stories from  [Caltech News](https://www.caltech.edu/about/news/adding-up-feynman-diagrams-to-make-predictions-about-real-materials) and  [Physics World.](https://physicsworld.com/a/feynman-diagrams-provide-insight-into-quasiparticles-in-solids/) 7-15-25
- Marco gives an invited talk at the KITP on our recent work on strong coupling and compressing interactions in matter.\
   The talk is available  [online on YouTube](https://www.youtube.com/watch?v=VvYlElyZAfc).  2-3-25
- We report a technique to compress electron-phonon interactions and greatly accelerate their calculation. Read the paper in  [Physical Review X](https://journals.aps.org/prx/abstract/10.1103/PhysRevX.14.021023) and the  [story from Caltech News.](https://www.caltech.edu/about/news/speeding-up-calculations-that-reveal-how-electrons-interact-in-materials)  6-1-24
- Our paper on electron-phonon interactions in strongly correlated materials is featured as  [Editor's Suggestion in Physical Review Materials.](https://journals.aps.org/prmaterials/issues/7/9)  9-9-23
- David Abramovitch receives the  [NSF Graduate Research Fellowship.](https://www.caltech.edu/about/news/nsf-selects-50-caltech-students-nine-alumni-for-research-fellowships) Congratulations! 4-10-23
- Our work on spin-phonon interactions and spin dynamics is published in  [Physical Review Letters](https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.129.197201) and  [Physical Review B](https://journals.aps.org/prb/abstract/10.1103/PhysRevB.106.174404) as Editor's Suggestion. Read the [story from Caltech News](https://www.caltech.edu/about/news/new-theory-of-electron-spin-to-aid-quantum-devices). 11-15-22
- Marco gives a plenary talk at  [23rd Asian Workshop on First-Principles](https://sites.google.com/phys.ncku.edu.tw/asian-23/speakers) Electronic Structure Calculations. 11-1-22
- Our group is part of the DOE [SciDAC center for simulation of nonequilibrium dynamics in materials.](https://www.noneqmscidac.net/) 9-1-22
- We receive support from the National Science Foundation to continue the development of our  [Perturbo code.](https://perturbo-code.github.io/)  Stay tuned! 8-1-22
- Marco's IPAM talk "Precise Quantum Mechanical Calculations of Electron Interactions and Dynamics" is [available on YouTube](https://www.youtube.com/watch?v=GHi5h8vjTO0). 4-18-22
- We released  [Perturbo v2.0](https://perturbo-code.github.io/mydoc_release_notes_2_0_0.html)  with many new capabilities. 3-14-22
- Our work on electron-phonon interactions in correlated materials, done in collaboration with Nicola Marzari's group at EPFL, \
   is published in  [Physical Review Letters](https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.127.126404). Read the [news article from EPFL](https://nccr-marvel.ch/highlights/2021-09-el-ph-interactions?fbclid=IwAR2C9rydDIA3JeLXsJmlsFfew7WFddPqXQmZR4eODI_4zsyLzOK1YwMKu5o). 9-15-21
- Hsiao-Yi wins a RIKEN Special Postdoctoral Fellowship and moves to Japan. Best of luck! 9-1-21
- I-Te receives the Alexander von Humboldt Fellowship and starts a postdoc at Max Planck, Hamburg. Well done! 8-15-21
- Hsiao-Yi wins Caltech's Demetriades-Tsafka-Kokkalis Prize for best PhD thesis in Nanotechnology. 6-2-21
- Marco has been promoted to Full Professor. Congratulations! 6-1-21
- Marco's CIQM seminar at Harvard on "First-principles electron dynamics in quantum materials" is  [available on YouTube.](https://www.youtube.com/watch?v=Y_M0v2x252Q&t=1236s) 5-1-21
- Caltech news features a  [story on our Perturbo code.](https://www.caltech.edu/about/news/computational-tool-for-materials-physics-growing-in-popularity?fbclid=IwAR0oCm6kJ-FtpT2FPOh_5zOshTn9nX7zowK1XY06f-sThKco4RQ5qccOOMg) 4-1-21
- Marco receives the  [ISSNAF "Franco Strazzabosco" Young Investigator Award](https://www.issnaf.org/young-investigator-awards-2020) for Research in Engineering. 12-1-20
- We hold the second virtual workshop of our  [PERTURBO code](https://perturbo-code.github.io/)  with over 120 participants. 11-18-20
- We hold the first virtual workshop of our  [PERTURBO code](https://perturbo-code.github.io/)  with over 50 participants. 10-15-20
- Marco's talk at the ICTP workshop on ultrafast charge dynamics in semiconductors is [available on YouTube.](https://www.youtube.com/watch?v=1MTGywHXSx8&feature=youtu.be&t=4083) 9-30-20
- Our papers on  [piezoelectric electron-phonon interaction](https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.125.136602)  and  [first-principles exciton-phonon calculations](https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.125.107401)  are both published in Physical Review Letters.
  9-15-20
- Hsiao-Yi Chen receives the prestigious J. Yang Fellowship from the J.Yang & Family Foundation.
  Congratulations! 5-5-20
- Marco and Jin-Jian were to give invited talks at the 2020 APS March Meeting.
  Slides of their talks are available on the APS website (links:  [Marco's talk on ultrafast dynamics](https://absuploads.aps.org/presentation.cfm?pid=17964) ,  [Jin-Jian's talk on charge transport in oxides](https://absuploads.aps.org/presentation.cfm?pid=18449) )
  4-1-20
- Our PERTURBO code  [is available for download.](https://perturbo-code.github.io/) \
  PERTURBO computes electron-phonon interactions, charge transport, and ultrafast carrier dynamics.
  It is efficient, parallelized, and carefully tested. Its workflows are intuitive and user friendly.
  \
  The paper accompanying PERTURBO is  [available on arXiv.](https://arxiv.org/abs/2002.02045)
  2-6-20
- [Caltech features our recent work](https://www.caltech.edu/about/news/how-electrons-break-speed-limit)  on charge transport in strontium titanate. 12-9-19
- Marco wins an Emerging Young Investigator Award at the [4th Functional Oxide Thin Films for Advanced Energy and Information Technology Conference](https://www.fusion-conferences.com/conference/95) in Portugal. 7-20-19
- Marco gives two invited talks at the ACS Spring Meeting in Orlando 4-1-19
- We give talks at the APS March Meeting in Boston 3-10-19
- Shiyuan Gao joins the group as a new postdoc 1-15-19
- Our work on electron-phonon interactions due to soft modes
  is published in Physical Review Letters.
  11-30-18
- [We receive DOE funding as part of a Caltech team](http://eas.caltech.edu/news/1145) 
  investigating quantum states in two-dimensional materials 9-28-18
- Our joint theory-experiment work on the Rashba effect in halide perovskites
  [is featured in the Caltech News!](http://www.caltech.edu/news/clues-solar-cell-efficiency-found-atomic-level-82586) 6-20-18
- The APS March Meeting comes to Los Angeles! Marco will give
   [an invited talk](http://meetings.aps.org/Meeting/MAR18/Session/H58.5)  on carrier dynamics and a
   [tutorial](https://www.aps.org/meetings/march/tutorials.cfm)  on electron-phonon coupling.
  The group will give talks on several topics 3-1-18 .
- Marco receives the NSF CAREER Award 12-15-17
- Our work on hot carriers in GaN and the origin of the LED efficiency droop
  [is featured in the Caltech News!](http://www.caltech.edu/news/microscopic-origin-efficiency-droop-leds-80436) 
  11-20-17
- Marco receives the AFOSR Young Investigator Award 10-10-17
- Marco gives an invited talk at the World Association of Theoretical and Computational Chemistry conference. 9-1-17
- We receive funding from Caltech's Space Solar Initiative. 8-1-17
- Our joint experiment-theory work on hot carrier super-diffusion
  [is featured in the Caltech News!](http://www.caltech.edu/news/hot-electrons-move-faster-expected-78694?utm_source=Caltech&utm_campaign=953d748256-EMAIL_CAMPAIGN_2017_06_08&utm_medium=email&utm_term=0_aba581b08e-953d748256-120099509)  6-15-17
- Congratulations to Vatsal for passing the candidacy exam! 6-14-17
- Two graduate students, Hsiao-Yi Chen (Physics) and Xiao Tong (Materials Science), join the group! 4-15-17
- Marco gives talks at Trinity College, Cambridge University and EPFL on our work on electron-phonon interactions and excited carrier dynamics. 4-15-17
- Our work on energy storage using defects is accepted in Scientific Reports. 4-1-17
- Our work on Super-Diffusion of Excited Carriers in Silicon, a theory-experiment collaboration with Prof. Ahmed Zewail, is accepted in Nature Communications! 3-3-17
- Luis, Jin-Jian, Vatsal, I-Te and Marco will present at the APS March Meeting. 3-2-17
- Marco gives two talks at the TMS conference in San Diego. 3-1-17
- Marco gives a Materials Research Lecture at Caltech on the Electron-Phonon Interaction.
  2-15-17
- Jin-Jian's [work on ab initio polar phonon scattering](http://journals.aps.org/prb/abstract/10.1103/PhysRevB.94.201201) is published in Phys. Rev. B as a Rapid Communication. 11-28-16
- The Psi-K features Marco's review article on ab initio electron and phonon dynamics.
  [Read the summary](http://www.epj.org/epjb-news/1100-epjb-colloquium-first-principles-dynamics-of-electrons-and-phonons) and the  [review article.](http://www.epj.org/epjb-news/1101-epjb-special-issue-dedicated-to-the-volker-heine-award) 11-4-16
- The NERSC supercomputing center features Marco's research on carrier dynamics and solar cells.
  [Read the news article and interview.](http://www.nersc.gov/news-publications/nersc-news/science-news/2016/multiscale-supercomputing-captures-photovoltaics-at-the-nanoscale/) 10-19-16
- We receive funding through the NSF SI2 program to develop a code for electron dynamics 9-10-16
- Marco gives an invited talk at the Keck Energy Materials Research workshop \
  at CSU Long Beach 9-10-16
- Marco's research on hot carriers featured on [phys.org](http://phys.org/news/2016-06-theoretical-energy-loss-solar-cells.html) 6-13-16
- Vatsal is awarded the prestigious Resnick graduate fellowship. Congratulations! 5-17-16
- Marco's review on computational methods for solar cells published in Energy and Environmental Science 5-12-16
- Congratulations to I-Te for passing the candidacy exam! 4-26-16
- Vatsal, I-Te, Seva, and Marco give talks at the APS March Meeting in Baltimore 3-14-16
- We receive funding through the Caltech-GIST Memorandum of Understanding! 1-27-16
- The group is awarded a start-up supercomputing time allocation at XSEDE, an NSF-funded center 1-25-16
- Marco gives an invited talk at the biennial Total Energy and Force Methods international workshop in Luxembourg 1-14-16
- The group is awarded supercomputing time at NERSC, a DOE-funded center 1-12-16
- Jin Jian Zhou joins the group as a JCAP-funded postdoc 12-15-15
- Marco will give three invited talks in Europe, at Oxford, Imperial, and CFEL in Hamburg, on our recent work on ultrafast carrier dynamics in semiconductors 11-15-15
- We obtain funding from JCAP, a DOE-BES supported hub to study the basic science of artificial photosynthesis 10-1-15
- Luis Agapito joins the group as a senior postdoc 10-1-15
- Ivanov Vsevolod (Seva) joins the group 10-1-15
- [Marco wins the 2015 Psi-K Volker Heine Young Investigator Award](http://aphms.caltech.edu/news/788) 9-8-15
- Marco gives an invited talk at the Psi-k conference 9-6-15
- Vatsal Jhalani and I-Te Lu join the group 9-1-15
- We obtain funding from Dow Chemical and the Resnick Institute 9-1-15
- Our new cluster, Tempo, completes the first production run 8-31-15