Pascal Engeler
ETH Zurich
5 Papers
58 Citations
Pascal Engeler is an academic researcher from ETH Zurich. The author has contributed to research in topics: Topology (chemistry) & Raman scattering. The author has an hindex of 3, co-authored 5 publications.
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Papers
Experimental characterization of fragile topology in an acoustic metamaterial.
Valerio Peri,Zhida Song,Marc Serra-Garcia,Pascal Engeler,Raquel Queiroz,Xueqin Huang,Weiyin Deng,Zhengyou Liu,B. Andrei Bernevig,B. Andrei Bernevig,B. Andrei Bernevig,Sebastian D. Huber +11 more
TL;DR: In this paper, the authors characterize the symmetry properties of the response of an acoustic metamaterial to establish the fragile nature of the low-lying Bloch bands and present a spectral signature in the form of spectral flow under twisted boundary conditions.
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Experimental characterization of fragile topology in an acoustic metamaterial
Valerio Peri,Zhida Song,Marc Serra-Garcia,Pascal Engeler,Raquel Queiroz,Xueqin Huang,Weiyin Deng,Zhengyou Liu,B. Andrei Bernevig,B. Andrei Bernevig,B. Andrei Bernevig,Sebastian D. Huber +11 more
TL;DR: A combined theoretical and experimental approach is presented to identify, classify, and measure the properties of fragile topological phases by invoking twisted boundary conditions and verifying the expected experimental signature in an acoustic crystal.
47
Comparison of coherent phonon generation by electronic and ionic Raman scattering in LaAlO$_3$
Martin J. Neugebauer,Dominik M. Juraschek,Matteo Savoini,Pascal Engeler,Larissa Boie,Elsa Abreu,Nicola A. Spaldin,Steven L. Johnson +7 more
TL;DR: In this article, the authors used time-resolved spectroscopy to compare coherent phonons generated by ionic Raman scattering with those created by more conventional electronic Ramans scattering on the nonmagnetic and non-strongly-correlated wide band-gap insulator LaAlO$_3$.
5
•Posted Content
Experimental characterization of spectral flow between fragile bands
Valerio Peri,Zhida Song,Marc Serra-Garcia,Pascal Engeler,Raquel Queiroz,Xueqin Huang,Weiyin Deng,Zhengyou Liu,B. Andrei Bernevig,Sebastian D. Huber +9 more
TL;DR: In this paper, a spectral signature of fragility in an acoustic crystal in the form of spectral flow under twisted boundary conditions is presented. And the authors fully characterize the symmetry properties of the measured acoustic response to firmly establish the fragile nature of the low-lying Bloch bands.
4
Comparison of coherent phonon generation by electronic and ionic Raman scattering in LaAlO 3
Martin J. Neugebauer,Dominik M. Juraschek,Dominik M. Juraschek,Matteo Savoini,Pascal Engeler,Larissa Boie,Elsa Abreu,Nicola A. Spaldin,Steven L. Johnson,Steven L. Johnson +9 more
- 10 Feb 2021
TL;DR: In this paper, the authors compared the efficiency of electronic versus ionic Raman scattering for driving coherent phonons in a simple perovskite oxide with ultrafast laser pulses.