Kristoffer Eggestad
About
Kristoffer Eggestad is a PhD-candidate in the Functional Materials and Materials Chemistry group (FACET) at NTNU. His research is mainly on ferroelectric domain walls for nanoelectronics using density functional theory (DFT) simulations.
Supervisor: Professor Sverre M. Selbach
Background
In 2016, Kristoffer started at the 5-year master's degree program called Chemical Engineering and Biotechnology at NTNU. He specialized in Materials Chemistry and Energy Technology and further in Functional Materials and Nanomaterials. In the spring of 2021, he wrote his master's thesis on solid state electrolytes for batteries, using DFT simulations as my main research method.
Competencies
Publications
2026
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Eggestad, Kristoffer;
Selbach, Sverre Magnus;
Williamson, Benjamin Albert Dobson;
Meier, Dennis.
(2026)
Ferroic Materials and Phenomena at Ferroic Domain Walls.
Norges teknisk-naturvitenskapelige universitet
Doctoral thesis
2025
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Zeiger, Caren Regine;
Eggestad, Kristoffer;
Walker, Julian Bradley;
Einarsrud, Mari-Ann;
Williamson, Benjamin Albert Dobson;
Grande, Tor.
(2025)
Quantifying Emptiness: On the Size of A-Site Vacancies in Tetragonal Tungsten Bronzes.
Chemistry of Materials
Academic article
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Williamson, Benjamin Albert Dobson;
Eggestad, Kristoffer;
Selbach, Sverre Magnus.
(2025)
Pseudo-lithium vacancies in hydrogen rich Li<inf>3</inf>OCl.
Journal of Materials Chemistry A
Academic article
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Gullbrekken, Øystein;
Eggestad, Kristoffer;
Tsoutsouva, Maria;
Williamson, Benjamin Albert Dobson;
Rettenwander, Daniel;
Einarsrud, Mari-Ann;
Selbach, Sverre Magnus.
(2025)
Phase Evolution and Thermodynamics of Cubic Li<inf>6.25</inf>Al<inf>0.25</inf>La<inf>3</inf>Zr<inf>2</inf>O<inf>12</inf> Studied by High-Temperature X-ray Diffraction.
Inorganic Chemistry
Academic article
2024
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Eggestad, Kristoffer;
Selbach, Sverre Magnus;
Williamson, Benjamin Albert Dobson.
(2024)
Doping implications of Li solid state electrolyte Li7La3Zr2O12.
Journal of Materials Chemistry A
Academic article
-
Eggestad, Kristoffer;
Williamson, Benjamin Albert Dobson;
Meier, Dennis;
Selbach, Sverre Magnus.
(2024)
Mobile intrinsic point defects for conductive neutral domain walls in LiNbO3.
Journal of Materials Chemistry C
Academic article
Journal publications
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Eggestad, Kristoffer;
Selbach, Sverre Magnus;
Williamson, Benjamin Albert Dobson.
(2024)
Doping implications of Li solid state electrolyte Li7La3Zr2O12.
Journal of Materials Chemistry A
Academic article
-
Zeiger, Caren Regine;
Eggestad, Kristoffer;
Walker, Julian Bradley;
Einarsrud, Mari-Ann;
Williamson, Benjamin Albert Dobson;
Grande, Tor.
(2025)
Quantifying Emptiness: On the Size of A-Site Vacancies in Tetragonal Tungsten Bronzes.
Chemistry of Materials
Academic article
-
Eggestad, Kristoffer;
Williamson, Benjamin Albert Dobson;
Meier, Dennis;
Selbach, Sverre Magnus.
(2024)
Mobile intrinsic point defects for conductive neutral domain walls in LiNbO3.
Journal of Materials Chemistry C
Academic article
-
Williamson, Benjamin Albert Dobson;
Eggestad, Kristoffer;
Selbach, Sverre Magnus.
(2025)
Pseudo-lithium vacancies in hydrogen rich Li<inf>3</inf>OCl.
Journal of Materials Chemistry A
Academic article
-
Gullbrekken, Øystein;
Eggestad, Kristoffer;
Tsoutsouva, Maria;
Williamson, Benjamin Albert Dobson;
Rettenwander, Daniel;
Einarsrud, Mari-Ann;
Selbach, Sverre Magnus.
(2025)
Phase Evolution and Thermodynamics of Cubic Li<inf>6.25</inf>Al<inf>0.25</inf>La<inf>3</inf>Zr<inf>2</inf>O<inf>12</inf> Studied by High-Temperature X-ray Diffraction.
Inorganic Chemistry
Academic article
Student thesis or dissertation
-
Eggestad, Kristoffer;
Selbach, Sverre Magnus;
Williamson, Benjamin Albert Dobson;
Meier, Dennis.
(2026)
Ferroic Materials and Phenomena at Ferroic Domain Walls.
Norges teknisk-naturvitenskapelige universitet
Doctoral thesis
Teaching
Outreach
2025
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Conference lectureEggestad, Kristoffer; Skogvoll, Ida Cathrine; Khalid, Muhammad Zeeshan; Skjærvø, Sandra Helen; Williamson, Benjamin Albert Dobson; Meier, Dennis; Selbach, Sverre Magnus. (2025) Reversible and rewritable p- and n-type conducting ferroelectric domain walls?. Materials Research Society Spring Meeting 2025
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Conference lectureEggestad, Kristoffer; Selbach, Sverre Magnus; Williamson, Benjamin Albert Dobson. (2025) Doping Li7La3Zr2O12 (LLZO) -Implications for Charge Carrier Concentration and Processing. Materials Research Society Spring Meeting 2025
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Conference lectureFinnseth, Øyvind; Brzozowski, Damian; Mathisen, Anders Christian; Brinkman, Stefanie Suzanne; Eggestad, Kristoffer; Williamson, Benjamin Albert Dobson; Selbach, Sverre Magnus; Bentmann, Hendrik; Hallsteinsen, Ingrid Gullikstad. (2025) Electronic Structure of LSMO thin films. European Materials Research Society Spring Meeting 2025
2024
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Conference lectureEggestad, Kristoffer; Williamson, Benjamin Albert Dobson; Meier, Dennis; Selbach, Sverre Magnus. (2024) Point Defects and Domain Walls in Soft Ferroelectric CsGeX3 (X = Cl, Br, I). MRS Spring Meeting
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Conference lectureEggestad, Kristoffer; Williamson, Benjamin Albert Dobson; Meier, Dennis; Selbach, Sverre Magnus. (2024) Point Defects and Domain Walls in Soft Ferroelectric CsGeX3 (X = Cl, Br, I). DPG Spring Meeting
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Conference lectureEggestad, Kristoffer; Williamson, Benjamin Albert Dobson; Selbach, Sverre Magnus. (2024) On-the-fly Machine-Learned Potentials for MD Simulations of Ferroelectric Phase Transitions. 2024 Fall Meeting
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Conference lectureZeiger, Caren Regine; Eggestad, Kristoffer; Williamson, Benjamin Albert Dobson; Walker, Julian Bradley; Einarsrud, Mari-Ann; Grande, Tor. (2024) What is the Size of a Cation Vacancy in Tetragonal Tungsten Bronzes?. ECAPD 2024
2023
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LectureKelly, Michael Robert; Hårberg, Sofie Brandtzæg; Eggestad, Kristoffer; Finnseth, Øyvind; Olsen, Gerhard Henning; Walker, Julian Bradley. (2023) Supermaterialer for en bærekraftig framtid. Researcher Night
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Conference posterEggestad, Kristoffer; Selbach, Sverre Magnus; Williamson, Benjamin Albert Dobson. (2023) Doping Implications for Garnet Li7La3Zr2O12. LLZO4WC
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Conference lectureEggestad, Kristoffer; Williamson, Benjamin Albert Dobson; Khalid, Muhammad Zeeshan; Meier, Dennis; Selbach, Sverre Magnus. (2023) Point Defects at Ferroelectric Domain Walls in LiNbO3. IMF2023
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Conference posterEggestad, Kristoffer; Williamson, Benjamin Albert Dobson; Khalid, Muhammad Zeeshan; Meier, Dennis; Selbach, Sverre Magnus. (2023) Point Defects at Ferroelectric Domain Walls in LiNbO3. NKS-FUM 2023
2022
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LectureKelly, Michael Robert; Hårberg, Sofie Brandtzæg; Eggestad, Kristoffer; Finnseth, Øyvind; Wiik, Kjell. (2022) Supermaterialer for en bærekraftig framtid. Researchers Night