Photoinduced structural dynamics of multiferroic TbMnO3

被引：2

作者：

Abreu, Elsa ^{[1
]}

Savoini, Matteo ^{[1
]}

Boie, Larissa ^{[1
]}

Beaud, Paul ^{[2
]}

Esposito, Vincent ^{[2
]}

Kubli, Martin ^{[1
]}

Neugebauer, Martin J. ^{[1
]}

Porer, Michael ^{[2
]}

Staub, Urs ^{[2
]}

Burganov, Bulat ^{[1
]}

Dornes, Chris ^{[1
]}

Rodriguez-Fernandez, Angel ^{[2
]}

Huber, Lucas ^{[1
]}

Lantz, Gabriel ^{[1
]}

Mardegan, Jose R. L. ^{[2
]}

Parchenko, Sergii ^{[2
]}

Rittmann, Jochen ^{[2
]}

Svetina, Cris ^{[2
]}

Ingold, Gerhard ^{[2
]}

Johnson, Steven L. ^{[1
,2
]}

机构：

[1] Eidgenoss TH ETH Zurich, Inst Quantum Elect, CH-8093 Zurich, Switzerland

[2] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

来源：

PHYSICAL REVIEW B | 2022年 / 106卷 / 21期

基金：

瑞士国家科学基金会;

关键词：

The research leading to these results has received funding from the Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung and its National Centers of Competence in Research; Molecular Ultrafast Science and Technology (NCCR MUST) and Materials' Revolution: Computational Design and Discovery of Novel Materials (NCCR MARVEL). E.A. acknowledges support from the ETH Zurich Postdoctoral Fellowship Program and from the Marie Curie Actions for People COFUND Program; as well as from the Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung through Ambizione Grant PZ00P2_179691. We acknowledge the Paul Scherrer Institute (PSI) for synchrotron radiation beamtime. We thank Dr. E. Pomjakushina at PSI for help with sample preparation; as well as the MicroXAS beamline staff for assistance; in particular A. R. Oggenfuss;

D O I：

10.1103/PhysRevB.106.214312

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We use time-resolved hard x-ray diffraction to investigate the structural dynamics of the multiferroic insulator TbMnO3 in the low-temperature antiferromagnetic and ferroelectrically ordered phase. The lattice response following photoexcitation at 1.55 eV is detected by measuring the (0 2 4) and (1 3 -5) Bragg reflections. A 0.022% tensile strain, normal to the surface, is seen to arise within 20-40 ps. The magnitude of this transient strain is over an order of magnitude lower than that predicted from laser-induced heating, which we attribute to a bottleneck in the energy transfer between the electronic and lattice subsystems. The timescale for the transient expansion is consistent with that of previously reported demagnetization dynamics. We discuss a possible relationship between structural and demagnetization dynamics in TbMnO3, in which photoinduced atomic motion modulates the exchange interaction, leading to a destruction of the magnetic order in the system.

引用

页数：7

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