jornada – Jornada Research Group

Prof. Jornada awarded the NSF CAREER award! [2023/01]

jornada — Fri, 27 Jan 2023 22:42:35 +0000

Prof. Jornada was awarded the 2023 National Science Foundation (NSF) CAREER award! The award will support the group’s effort to compute novel multilayer stacking of 2D materials and their emergent electronic and optical properties.

Collaboration on a novel heat-transfer mechanism published in Nature Nano.[2022/12]

jornada — Fri, 27 Jan 2023 22:40:23 +0000

In a combined experimental-theoretical collaboration with researchers from Stanford, SLAC, LBL, and UC Berkeley, we discover a new heat conduction mechanism across interfaces of atomically thin materials.

https://www.nature.com/articles/s41565-022-01253-7

Work on moiré excitons published in Science [2022/12]

jornada — Fri, 27 Jan 2023 19:59:58 +0000

Our collaborative work to validate the nature of excitons in moiré materials was published in Science! The collaboration involves the groups at UC Berkeley and LBL.

https://www.science.org/doi/10.1126/science.add9294

Collaboration on novel moiré excitons accepted to Nature [2022/05]

jornada — Thu, 19 May 2022 17:59:17 +0000

Our collaborative work on novel moiré excitons was accepted into Nature. The collaboration involves the groups of Feng Wang and Steve Louie, at UC Berkeley. More details to come soon!

https://arxiv.org/abs/2201.02562

Collaboration on excitons in moiré systems published in Science [2022/04]

jornada — Wed, 23 Mar 2022 17:22:32 +0000

Our collaborative work on the nature of excitons in moiré materials was accepted into Science! The collaboration involves the groups of Tony Heinz (Stanford AP) and Sivan Refaely-Abramson (Weizmann Institute).

https://www.science.org/doi/full/10.1126/science.abm8511

Johnathan publishes first-author Nature paper on moiré excitons [2022/03]

jornada — Mon, 14 Mar 2022 23:34:58 +0000

Johnathan, together with collaborators in the Tony Heinz (Stanford AP) and Keshav Dani’s (OIST) groups, published a ground-breaking work involving excitons in twisted materials. Johnathan’s calculations allowed novel time-resolved angle-resolved photo-emission spectrum (TR-ARPES) techniques to directly capture the localization of light-driven excitations in materials known as excitons.

Details: https://www.nature.com/articles/s41586-021-04360-y

Aaron publishes paper on singlet fission on JPCL [2022/01]

jornada — Fri, 14 Jan 2022 23:31:08 +0000

Aaron Altman, together with Sivan Refaely-Abramson, published the first paper of the Jornada group on the Journal of Physical Chemistry Letters! Singlet fission is a process that allows a photon to generate more than one excited electron, and has the potential to significantly increase the efficiency of solar-cell devices beyond the traditional efficiency of ~23%. Our work identities general and non-obvious rules associated with this process, and explains why two similar materials can have quite different singlet-fission rates.

Details: https://pubs.acs.org/doi/abs/10.1021/acs.jpclett.1c03540

Dionne, Heinz and Jornada receive Keck foundation award for excited-state chemistry [2021/12]

jornada — Wed, 20 Jan 2021 23:20:21 +0000

Traditionally, chemical reactions take place in the electronic ground-state, i.e., when the electrons are occupying the lowest-energy configuration. In this scenario, one only exerts “broad brush” macroscopic control of the reaction by varying the temperature and concentration of the various gases.

Prof. Jornada, together with Profs. Dionne and Heinz, were selected by the Keck foundation to work on another paradigm for chemical reactions, where the electrons are in the excited state. By controlling where the excited electrons are located in space and their energy, there is the potential to drive much more selective and energy-efficient chemical reactions. We are looking forward to developing and applying our computational methods to help develop this nascent field.

Further details: http://www.wmkeck.org/grant-abstracts-final/research

Our work on quasi-2D plasmons was featured!

jornada — Fri, 21 Feb 2020 18:01:30 +0000

Our work on universal dispersionless plasmons was featured in the news!

Felipe to give the MSE Colloquium (Oct/4)

jornada — Tue, 01 Oct 2019 18:08:29 +0000

Felipe will give the Materials Science and Engineering Colloquium this Friday, Oct 4, at 3 pm, on New Computational Perspectives for Understanding and Predicting Excited-State Phenomena in Novel Materials. More information here.