Bogoliubov waves and distant transport of magnon condensate at room temperature

Dmytro A. Bozhko; Alexander J. E. Kreil; Halyna Yu Musiienko-Shmarova; Alexander A. Serga; Anna Pomyalov; Victor S. L'vov; Burkard Hillebrands

doi:10.1038/s41467-019-10118-y

Bogoliubov waves and distant transport of magnon condensate at room temperature

Dmytro A. Bozhko, Alexander J. E. Kreil, Halyna Yu Musiienko-Shmarova, Alexander A. Serga, Anna Pomyalov, Victor S. L'vov, Burkard Hillebrands^*

^*Corresponding author for this work

Department of Chemical and Biological Physics

Research output: Contribution to journal › Article › peer-review

45 Citations (Scopus)

Abstract

A macroscopic collective motion of a Bose-Einstein condensate (BEC) is commonly associated with phenomena such as superconductivity and superfluidity, often generalised by the term supercurrent. Another type of motion of a quantum condensate is second sound-a wave of condensate's parameters. Recently, we reported on the decay of a BEC of magnons caused by a supercurrent outflow of the BEC from the locally heated area of a room temperature magnetic film. Here, we present the observation of a macroscopic BEC transport mechanism related to the excitation of second sound. The condensed magnons, being propelled out of the heated area, form compact humps of BEC density, which propagate many hundreds of micrometers in the form of distinct second sound-Bogoliubov waves. This discovery advances the physics of quasiparticles and allows for the application of related transport phenomena for low-loss data transfer in magnon spintronics devices.

Original language	English
Article number	2460
Number of pages	9
Journal	Nature Communications
Volume	10
Issue number	1
Early online date	5 Jun 2019
DOIs	https://doi.org/10.1038/s41467-019-10118-y
Publication status	Published - Dec 2019

Bibliographical note

Financial support of the European Research Council within the Advanced Grant 694709 SuperMagnonics—Supercurrents of Magnon Condensates for Advanced Magnonics as well as financial support of the Deutsche Forschungsgemeinschaft (DFG) through the Collaborative Research Center SFB/TRR-49 Condensed Matter Systems with Variable Many-Body Interactions (project INST 161/544-3) and within the DFG project INST 248/178-1 is gratefully acknowledged.
A.A.S. and B.H. contributed to the experimental idea, planned and supervised the project. D.A.B. and A.J.E.K. contributed to the experimental setup and carried out the experiments. A.P. and V.S.L. developed the theoretical model. H.Y.M-S. carried out the numerical analysis. A.J.E.K. performed temperature simulations. All authors analysed the experimental data and discussed the results.

All Science Journal Classification (ASJC) codes

General Chemistry
General Biochemistry,Genetics and Molecular Biology
General Physics and Astronomy

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https://arxiv.org/abs/1808.07407Licence: Other

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title = "Bogoliubov waves and distant transport of magnon condensate at room temperature",

abstract = "A macroscopic collective motion of a Bose-Einstein condensate (BEC) is commonly associated with phenomena such as superconductivity and superfluidity, often generalised by the term supercurrent. Another type of motion of a quantum condensate is second sound-a wave of condensate's parameters. Recently, we reported on the decay of a BEC of magnons caused by a supercurrent outflow of the BEC from the locally heated area of a room temperature magnetic film. Here, we present the observation of a macroscopic BEC transport mechanism related to the excitation of second sound. The condensed magnons, being propelled out of the heated area, form compact humps of BEC density, which propagate many hundreds of micrometers in the form of distinct second sound-Bogoliubov waves. This discovery advances the physics of quasiparticles and allows for the application of related transport phenomena for low-loss data transfer in magnon spintronics devices.",

author = "Bozhko, {Dmytro A.} and Kreil, {Alexander J. E.} and Musiienko-Shmarova, {Halyna Yu} and Serga, {Alexander A.} and Anna Pomyalov and L'vov, {Victor S.} and Burkard Hillebrands",

note = "Financial support of the European Research Council within the Advanced Grant 694709 SuperMagnonics—Supercurrents of Magnon Condensates for Advanced Magnonics as well as financial support of the Deutsche Forschungsgemeinschaft (DFG) through the Collaborative Research Center SFB/TRR-49 Condensed Matter Systems with Variable Many-Body Interactions (project INST 161/544-3) and within the DFG project INST 248/178-1 is gratefully acknowledged. A.A.S. and B.H. contributed to the experimental idea, planned and supervised the project. D.A.B. and A.J.E.K. contributed to the experimental setup and carried out the experiments. A.P. and V.S.L. developed the theoretical model. H.Y.M-S. carried out the numerical analysis. A.J.E.K. performed temperature simulations. All authors analysed the experimental data and discussed the results.",

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AU - Kreil, Alexander J. E.

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AU - Serga, Alexander A.

AU - Pomyalov, Anna

AU - L'vov, Victor S.

AU - Hillebrands, Burkard

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N2 - A macroscopic collective motion of a Bose-Einstein condensate (BEC) is commonly associated with phenomena such as superconductivity and superfluidity, often generalised by the term supercurrent. Another type of motion of a quantum condensate is second sound-a wave of condensate's parameters. Recently, we reported on the decay of a BEC of magnons caused by a supercurrent outflow of the BEC from the locally heated area of a room temperature magnetic film. Here, we present the observation of a macroscopic BEC transport mechanism related to the excitation of second sound. The condensed magnons, being propelled out of the heated area, form compact humps of BEC density, which propagate many hundreds of micrometers in the form of distinct second sound-Bogoliubov waves. This discovery advances the physics of quasiparticles and allows for the application of related transport phenomena for low-loss data transfer in magnon spintronics devices.

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Bogoliubov waves and distant transport of magnon condensate at room temperature

Abstract

Bibliographical note

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