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Nonlinear quantum magnetophononics in SrCu2(BO3)2

Flavio Giorgianni1, Björn Wehinger1,2,3, Stephan Allenspach1,2, Nicola Colonna1,4*, Carlo Vicario1, Pascal Puphal1,5, Ekaterina Pomjakushina1, Bruce Normand1,6,7, Christian Rüegg1,2,7,8

1 Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland.

2 Department of Quantum Matter Physics, University of Geneva, CH-1211 Geneva 4, Switzerland.

3 Department of Molecular Sciences and Nanosystems, Ca’ Foscari University of Venice, 30172 Venezia Mestre, Italy.

4 National Centre for Computational Design and Discovery of Novel Materials (MARVEL), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland

5 Max Planck Institute for Solid State Research, Heisenbergstrasse1, 70569 Stuttgart, Germany.

6 Lehrstuhl für Theoretische Physik I, Technische Universität Dortmund, Otto-Hahn-Strasse 4, 44221 Dortmund, Germany

7 Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland

8 Institute of Quantum Electronics, ETH Zürich, CH-8093 Hönggerberg, Switzerland.

* Corresponding authors emails:
DOI10.24435/materialscloud:cp-6s [version v1]

Publication date: Oct 28, 2021

How to cite this record

Flavio Giorgianni, Björn Wehinger, Stephan Allenspach, Nicola Colonna, Carlo Vicario, Pascal Puphal, Ekaterina Pomjakushina, Bruce Normand, Christian Rüegg, Nonlinear quantum magnetophononics in SrCu2(BO3)2, Materials Cloud Archive 2021.175 (2021),


Harnessing the most advanced capabilities of quantum technologies will require the ability to control macroscopic quantum states of matter. Quantum magnetic materials provide a valuable platform for realizing highly entangled many-body quantum systems, and have been used to investigate phenomena ranging from quantum phase transitions (QPTs) to fractionalization, topological order and the entanglement structure of the quantum wavefunction. Although multiple studies have controlled their properties by static applied pressures or magnetic fields, dynamical control at the fundamental timescales of their magnetic interactions remains completely unexplored. However, major progress in the technology of ultrafast laser pulses has enabled the dynamical modification of electronic properties, and now we demonstrate the ultrafast control of quantum magnetism. This we achieve by a magnetophononic mechanism, the driving of coherent lattice displacements to produce a resonant excitation of the quantum spin dynamics. Specifically, we apply intense terahertz laser pulses to excite a collective spin state of the quantum antiferromagnet SrCu2(BO3)2 by resonance with the nonlinear mixing frequency of the driven phonons that modulate the magnetic interactions. Our observations indicate a universal mechanism for controlling nonequilibrium quantum many-body physics on timescales many orders of magnitude faster than those achieved to date.

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Magnetophononic Strongly Correlated Electrons Tera-Hertz pump and probe Quantum magnetic materials H2020 MARVEL SNSF

Version history:

2023.156 (version v2) Oct 17, 2023 DOI10.24435/materialscloud:tm-4t
2021.175 (version v1) [This version] Oct 28, 2021 DOI10.24435/materialscloud:cp-6s