Jan Berges

Welcome to my personal website. Please look around.

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Theses

Many-body instabilities in 2D materials, dissertation (2020) [TeX, published version]
On the scope of McMillan’s formula, master thesis (2016) [TeX, GitHub, SciPost]
Phasen ladungsabhängiger Adsorbatstrukturen auf Graphen, bachelor thesis (2014) [TeX, GitHub]

Papers

A. Schobert, J. Berges, E. G. C. P. van Loon, M. A. Sentef, S. Brener, M. Rossi, and T. O. Wehling, Ab initio electron-lattice downfolding: Potential energy landscapes, anharmonicity, and molecular dynamics in charge density wave materials, SciPost Phys. 16, 046 (2024), arXiv:2303.07261 [code & data]
T. Knispel, J. Berges, A. Schobert, E. G. C. P. van Loon, W. Jolie, T. Wehling, T. Michely, and J. Fischer, Unconventional charge-density-wave gap in monolayer NbS₂, Nano Lett. 24, 1045 (2024), arXiv:2307.13791 [code & data]
J. Berges, N. Girotto, T. Wehling, N. Marzari, and S. Poncé, Phonon self-energy corrections: To screen, or not to screen, Phys. Rev. X 13, 041009 (2023), arXiv:2212.11806 [code & data]
J. Berges, Toward a complete theory of crystal vibrations: Viewpoint on Phys. Rev. X 13, 031026 (2023), Physics 16, 151 (2023) [local version]
B. Shao, X. Jiang, J. Berges, S. Meng, and B. Huang, Engineering interlayer hybridization in energy space via dipolar overlayers, Chin. Phys. Lett. 40, 087303 (2023), arXiv:2202.03882
N. Witt, J. M. Pizarro, J. Berges, T. Nomoto, R. Arita, and T. O. Wehling, Doping fingerprints of spin and lattice fluctuations in moiré superlattice systems, Phys. Rev. B 105, L241109 (2022), arXiv:2108.01121
C. van Efferen, J. Berges, J. Hall, E. van Loon, S. Kraus, A. Schobert, T. Wekking, F. Huttmann, E. Plaar, N. Rothenbach, K. Ollefs, L. M. Arruda, N. Brookes, G. Schönhoff, K. Kummer, H. Wende, T. Wehling, and T. Michely, A full gap above the Fermi level: The charge density wave of monolayer VS₂, Nat. Commun. 12, 6837 (2021), arXiv:2101.01140
A. Schobert, J. Berges, T. Wehling, and E. van Loon, Downfolding the Su-Schrieffer-Heeger model, SciPost Phys. 11, 079 (2021), arXiv:2104.09207
E. G. C. P. van Loon, J. Berges, and T. O. Wehling, Downfolding approaches to electron-ion coupling: Constrained density-functional perturbation theory for molecules, Phys. Rev. B 103, 205103 (2021), arXiv:2102.10072 [code & data]
J. Berges, E. G. C. P. van Loon, A. Schobert, M. Rösner, and T. O. Wehling, Ab initio phonon self-energies and fluctuation diagnostics of phonon anomalies: Lattice instabilities from Dirac pseudospin physics in transition metal dichalcogenides, Phys. Rev. B 101, 155107 (2020), arXiv:1911.02450 [code & data]
J. Hall, N. Ehlen, J. Berges, E. van Loon, C. van Efferen, C. Murray, M. Rösner, J. Li, B. V. Senkovskiy, M. Hell, M. Rolf, T. Heider, M. C. Asensio, J. Avila, L. Plucinski, T. Wehling, A. Grüneis, and T. Michely, Environmental control of charge density wave order in monolayer 2H-TaS₂, ACS Nano 13, 10210 (2019)
E. Kamil, J. Berges, G. Schönhoff, M. Rösner, M. Schüler, G. Sangiovanni, and T. O. Wehling, Electronic structure of single layer 1T-NbSe₂: Interplay of lattice distortions, non-local exchange, and Mott-Hubbard correlations, J. Phys. Condens. Matter 30, 325601 (2018), arXiv:1804.03898

Web apps

Most of this requires JavaScript and a mouse (no touchscreen).

Tonbandfetzen
Adsorbates on graphene (drag & drop)
Mass-spring model of TMDCs
Phonon renormalization
Ball games (use arrow keys, catch stars, avoid ground)
Slippery slopes (drag & drop)
Color blender I
Color blender II
Color picker
Patience
Orbits
Mandelbrot I (2 colors)
Mandelbrot II (16 colors)
Mandelbrot III (16777216 colors)
Mandelbrot IV (16777216 colors)
Grids
Random art
Forum
Whiteboard
Escher whiteboard

Codes

elphmod – Python modules for electron-phonon models [tar, md5, 🐱, 🦊, 🪣]
StoryLines – Line plots with Python & TikZ [tar, md5, 🐱, 🦊, 🪣]
Tonbandfetzen – Audio from plain text [tar, md5, 🐱, 🦊, 🪣]
makemake90 – Generate Makefiles for modular Fortran programs [tar, md5, 🐱, 🦊, 🪣]
ebmb – Solve multiband Eliashberg equations [tar, md5, 🐱, 🦊, 🪣]
ebbw – Solve finite-bandwidth Eliashberg equations [tar, md5, 🐱, 🦊, 🪣]
ris2bib – Convert bibliographies from RIS to BibTeX format [tar, md5, 🐱, 🦊, 🪣]
frettipy – No fretting about pretty Python [tar, md5, 🐱, 🦊, 🪣]
honeycombinations – Simulate adatoms on graphene [tar, md5, 🐱, 🦊, 🪣]

Texts

Wanderer über dem Nebelmeer (10 October 2012)
Freiheit ist Sklaverei (5 February 2012)
Geister (18 November 2009)
Unser Glück war nicht zu fassen (31 October 2009)
Stumm (19 October 2009)

Profiles

Contact

Jan Berges
28215 Bremen
Germany

My email address is post at this domain.

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