Simon Bettler
ETH Zurich
18 Papers
37 Citations
Simon Bettler is an academic researcher from ETH Zurich. The author has contributed to research in topics: Antiferromagnetism & Semiconductor. The author has an hindex of 5, co-authored 9 publications.
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Papers
Magnetic structure and spin waves in the frustrated ferro-antiferromagnet Pb 2 VO ( PO 4 ) 2
Simon Bettler,Florian Landolt,Ömer M. Aksoy,Zewu Yan,Severian Gvasaliya,Yiming Qiu,Eric Ressouche,K. Beauvois,Stéphane Raymond,Alexey Ponomaryov,Sergei Zvyagin,Andrey Zheludev +11 more
TL;DR: The observed excitation spectrum is found to be inconsistent with a simple square lattice model previously proposed for this material, and at least four distinct exchange coupling constants are required to reproduce the measured spin wave dispersion.
Sign-switching of dimer correlations in SrCu$_2$(BO$_3$)$_2$ under hydrostatic pressure.
TL;DR: In this paper, magnetic and vibrational excitations in SrCu$(2$(BO$_3$)$_2$ are studied using Raman spectroscopy at hydrostatic pressures up to 34 kbar and temperatures down to 2.6 K. The authors link the magnitude of the effect to the magnetic exchange energy on the dimer bonds in the Sutherland-Shastry spin lattice.
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Presaturation phase in the frustrated ferro-antiferromagnet Pb 2 VO (PO 4 )2
Florian Landolt,Simon Bettler,Zewu Yan,Severian Gvasaliya,Andrey Zheludev,S. Mishra,Ilya Sheikin,S. Krämer,Mladen Horvatić,Alsu Gazizulina,Oleksandr Prokhnenko +10 more
TL;DR: In this article, the prototypical quasi-two-dimensional ferro-antiferromagnet was analyzed in magnetic fields up to 27 T. The measured NMR spectra suggest a complex and possibly incommensurate magnetic order in that regime.
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Presaturation phase with no dipolar order in a quantum ferro-antiferromagnet
V. K. Bhartiya,K. Yu. Povarov,Dominic Blosser,Simon Bettler,Zewu Yan,S N Gvasaliya,Stéphane Raymond,Eric Ressouche,K. Beauvois,Jianhui Xu,F. Yokaichiya,Andrey Zheludev +11 more
TL;DR: In this paper, a spin state which emerges in high magnetic fields after antiferromagnetic order is terminated at 4.0$ T and is a distinct thermodynamic phase with a well-defined phase boundary at 6.5$ T is clearly separate from the fully saturated phase.
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Sign switching of dimer correlations in SrCu 2 ( BO 3 ) 2 under hydrostatic pressure
Simon Bettler,Lena Stoppel,Zewu Yan,Severian Gvasaliya,Andrey Zheludev +4 more
- 10 Jan 2020
TL;DR: In this paper, the authors infer nearest neighbor spin correlations from their effect on the frequency of a particular optical phonon, measured using Raman spectroscopy in a diamond-anvil pressure cell.
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