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Joel Davidsson


My research focuses on point defects in semiconductors for quantum technologies.


I am searching for point defects with suitable properties for quantum applications. To this end, I use high-throughput first-principles calculations.

Point defects in semiconductors are excellent for quantum technologies such as single-photon emitters and qubits. Qubits are used in quantum computers to perform specific computations orders of magnitude faster than classical computers. However, only a few point defect systems are currently being studied and used, as identifying a point defect is a time-consuming and data-intensive process. The space of possible point defects in various host materials is vast!

My research aims to find suitable point defects for quantum applications.

I use high-throughput first-principles calculations based on density functional theory to achieve this, specifically as the main developer of ADAQ (Automatic Defect Analysis and Qualification), a software platform for automatic workflows for high-throughput calculations of point defects in semiconductors. Using this software, we have created a database of the most relevant defect properties. I also lead the ADAQ Database Initiative, which continuously releases the calculated data through an online web interface. Access the ADAQ defect database to explore point defects in various host materials. We have identified and predicted several interesting defects; see publications for more details.

Google Scholar ID: OKMA6DcAAAAJ




Oscar Bulancea Lindvall, Joel Davidsson, Rickard Armiento, Igor Abrikosov (2023) Chlorine vacancy in 4H-SiC: An NV-like defect with telecom-wavelength emission Physical Review B, Vol. 108, Article 224106 Continue to DOI


Joel Davidsson, Rohit Babar, Danial Shafizadeh, Ivan Gueorguiev Ivanov, Viktor Ivády, Rickard Armiento, Igor A. Abrikosov (2022) Exhaustive characterization of modified Si vacancies in 4H-SiC Nanophotonics, Vol. 11, p. 4565-4580 Continue to DOI


Joel Davidsson, Viktor Ivády, Rickard Armiento, Igor A. Abrikosov (2021) ADAQ: Automatic workflows for magneto-optical properties of point defects in semiconductors Computer Physics Communications, Vol. 269, Article 108091 Continue to DOI
Joel Davidsson (2021) Color Centers in Semiconductors for Quantum Applications: A High-Throughput Search of Point Defects in SiC


Joel Davidsson (2020) Theoretical polarization of zero phonon lines in point defects Journal of Physics: Condensed Matter, Vol. 32, Article 385502 Continue to DOI

Master and doctoral theses