Kris Holtgrewe

Researcher, Theoretical Materials Science, Physics, Justus Liebig University Giessen

[Kris Holtgrewe @KrisHolti]

Hello #newjob! Superhappy to start my #postdoc at @UniTrento. The #research #project is about photo-induced phase transitions, possibly applicable in novel #materials or high-speed information storage. Looking forward to new experiences and good results! #science #physics

[Materials MDPI @Materials_mdpi]

#Publishedpaper
Welcome to read:

Evolution of Topological Surface States Following Sb Layer #Adsorption on Bi2Se3

👉Full Paper: https://t.co/O9pfjhIIu7
📝Authored by Dr. Kris Holtgrewe et al.

#surface science;
#topological #insulator

[Kris Holtgrewe @KrisHolti]

After two weeks at TU #Berlin back home. The discussions with the Dähne group were very productive. Calculations on rare-earth silicide nanostructures which are capped with silicon to make them stable outside vacuum are promising.

#physics #research #science #nanotechnology

[Kris Holtgrewe @KrisHolti]

Finally, my #dissertation has been published by the @jlugiessen library: https://t.co/HpsHxjdSbM
Enjoy reading! 😉
#PhD #Science #Physics #materials #research

[Kris Holtgrewe @KrisHolti]

#PhD completed ✅️
Sucessfully defended my thesis at @jlugiessen on Monday. Thesis: RESi2 nanowires on silicon surfaces, a quasi-one-dimensional electronic system; and thin Sb layers on Bi2Se3, a topologically nontrivial vdW heterostructure.
#PhDone #Science #Physics #materials

[Kris Holtgrewe @KrisHolti]

Depending on the indices of the silicon + gold-nanowires surface, additional Au binds to the Au chains or to the Si step-edge atoms. The latter causes a non-local distortion of the gold chains.
Thanks to all collaborators! #science #research #physics

[Kris Holtgrewe @KrisHolti]

New publication in @ElsevierPhysics Surface Science:
Christa Fink, Florian A. Pfeiffer, Kris Holtgrewe, Simone Sanna: "Au adsorption on stepped Si(hhk)-Au surfaces."
Surface Science 718, 122010 (2022)
https://t.co/TakuzJdaQ4

[Kris Holtgrewe @KrisHolti]

This paper of @HoganConor gives insight into the growth of substrate-supported pnictogen (P, As, Sb and Bi) thin films and into general mechanisms determining phase stability and transitions, along with applied ab-initio #thermodynamics. #science #research #physics

[Kris Holtgrewe @KrisHolti]

New in @PhysRevB :
Phys. Rev. B 104, 245421 (2021) - Theoretical study of stability, epitaxial formation, and phase transformations of two-dimensional pnictogen allotropes https://t.co/p7Sf2mlHRA

[Kris Holtgrewe @KrisHolti]

New in @MDPIOpenAccess: Spectroscopic Analysis of Rare-Earth Silicide Structures on the Si(111) Surface.
Joint exp and theo Raman spectroscopy confirms model for #RareEarths silicide films on silicon. Thanks to all coworkers! #science #research #physics
https://t.co/Ipor93efbl

[Kris Holtgrewe @KrisHolti]

Finally, part of my work as #PhD student is published in @MDPIOpenAccess: Exciting insights into the topological phase transition of Sb layers during adsorption on Bi2Se3.
Many thanks to @HoganConor and Simone Sanna for collab.
#physics #science #research
https://t.co/aZv7If8dIY

[Kris Holtgrewe @KrisHolti]

New in @PhysRevLett Mar21: "Enforced Long-Range Order in 1D Wires by Coupling to Higher Dimensions." Disordered adsorption of Au atoms enhances the order of Au nanowires on Si(553). Many thanks to all coworkers! #quantum #physics #research #nano #science
https://t.co/Vz5wzm5N4c

[Polizei Mittelhessen @Polizei_MH]

#A3

1. Abseilaktion von Autobahnbrücke bei #Wörsdorf

2. Stau

3. Schwerer Unfall am Stauende

4. Menschen wurden schwer verletzt

#Dannenroeder #A49 #DannenroederForst

[Kris Holtgrewe @KrisHolti]

New publication @PhysRevB Sep20: Tracking the dimensionality of a quantum system. Lateral confinement of 2D TbSi2 layer on silicon leads to a 1D system, dominated by edge states. Many thanks to all coworkers! #quantum #physics #materials #science
https://t.co/RRaX8WTKyi

[Conor Hogan @HoganConor]

Proud to see this solid theory-expt collaboration on 2D CI-3D TI heterointerfaces finally in print!
https://t.co/6oAwea0VYI

[Kris Holtgrewe @KrisHolti]

Publication (Sep 2020): 'Topologization of β-antimonene on Bi2Se3 via proximity effects'. A deep insight into the band hybridization of antimony layers (trivial) on bismuth selenide (topological). Many thanks to all coworkers! #science #physics #research https://t.co/ye96Cf1eSk

[Kris Holtgrewe @KrisHolti]

Today, I visited the grave of Wilhelm Conrad #Röntgen on the Old Graveyard in #Gießen. He was Professor at the @jlugiessen and was awarded with the Nobel prize for the production and detection of #XRays

[Kris Holtgrewe @KrisHolti]

University hospital of #Giessen, #Germany recruits medical students for patient care #corona #coronavirus #COVID19

[Universität Gießen @jlugiessen]

Aufruf an der Medizin-Studierende der #JLUGießen mit abgeschlossener Ausbildung zur #Pflegekraft: Unterstützung bei Patientenversorgung in der #Corona-Krise gesucht. @UKGM_Presse https://t.co/UJKM4uyhWM

[Universität Gießen @jlugiessen]

#Lungenforschung und #Virologie der #JLUGießen sind aktuell sehr gefragt. Aktuelle Äußerungen von Prof. Susanne Herold und Prof. John Ziebuhr zu #Corona: https://t.co/SKrHmrEzGe #COVID2019 #coronavirusdeutschland #FlattenTheCurve

[Kris Holtgrewe @KrisHolti]

Train back to #Paderborn for #Corona #Homeoffice. It is a bit creepy that the Regionalexpress to Kassel is that empty. #COVID19de