G
Gunnar Berghäuser
Researcher at Chalmers University of Technology
Publications - 35
Citations - 2916
Gunnar Berghäuser is an academic researcher from Chalmers University of Technology. The author has contributed to research in topics: Exciton & Monolayer. The author has an hindex of 20, co-authored 34 publications receiving 2231 citations. Previous affiliations of Gunnar Berghäuser include Technical University of Berlin.
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Journal ArticleDOI
Intrinsic homogeneous linewidth and broadening mechanisms of excitons in monolayer transition metal dichalcogenides
Galan Moody,Chandriker Kavir Dass,Kai Hao,Chang-Hsiao Chen,Lain-Jong Li,Akshay Singh,Kha Tran,Genevieve Clark,Xiaodong Xu,Gunnar Berghäuser,Ermin Malic,Andreas Knorr,Xiaoqin Li +12 more
TL;DR: The key insights reported here—strong many-body effects and intrinsically rapid radiative recombination—are expected to be ubiquitous in atomically thin semiconductors.
Journal ArticleDOI
Excitonic linewidth and coherence lifetime in monolayer transition metal dichalcogenides.
Malte Selig,Gunnar Berghäuser,Archana Raja,Philipp Nagler,Christian Schüller,Tony F. Heinz,Tobias Korn,Alexey Chernikov,Alexey Chernikov,Ermin Malic,Andreas Knorr +10 more
TL;DR: It is shown that the excitonic coherence lifetime is determined by phonon-induced intravalley scattering and intervalley scattering into dark exciton states, and in particular, in WS2, exciton relaxation processes involving phonon emission into lower-lying dark states that are operative at all temperatures.
Journal ArticleDOI
Analytical approach to excitonic properties of MoS2
Gunnar Berghäuser,Ermin Malic +1 more
TL;DR: In this paper, an analytical analysis of the optical absorption spectrum of monolayer molybdenum-disulfide is presented, which gives insights into the microscopic origin of excitonic transitions, their relative oscillator strength and binding energy.
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Strain control of exciton-phonon coupling in atomically thin semiconductors
Iris Niehues,Robert Schmidt,Matthias Drüppel,Philipp Marauhn,Dominik Christiansen,Malte Selig,Gunnar Berghäuser,Daniel Wigger,Robert Schneider,Lisa Braasch,Rouven Koch,Andres Castellanos-Gomez,Tilmann Kuhn,Andreas Knorr,Ermin Malic,Michael Rohlfing,Steffen Michaelis de Vasconcellos,Rudolf Bratschitsch +17 more
TL;DR: Moderate strain values on the order of only 1% are already sufficient to globally tune the exciton-phonon interaction in TMDC monolayers and hold the promise for controlling the coupling on the nanoscale.
Journal ArticleDOI
Trion formation dynamics in monolayer transition metal dichalcogenides
Akshay Singh,Galan Moody,Kha Tran,Marie Scott,Vincent Overbeck,Gunnar Berghäuser,John Schaibley,Edward Seifert,Dennis Pleskot,Nathaniel M. Gabor,Jiaqiang Yan,Jiaqiang Yan,David Mandrus,David Mandrus,Marten Richter,Ermin Malic,Xiaodong Xu,Xiaoqin Li +17 more
TL;DR: In this paper, the authors report charged exciton (trion) formation dynamics in doped monolayer transition metal dichalcogenides, specifically molybdenum diselenide (MoSe2), using resonant two-color pump-probe spectroscopy.