Supercurrent in a room-temperature Bose-Einstein magnon condensate

Dmytro A. Bozhko; Alexander A. Serga; Peter Clausen; Vitaliy I. Vasyuchka; Frank Heussner; Gennadii A. Melkov; Anna Pomyalov; Victor S. L'vov; Burkard Hillebrands

doi:10.1038/nphys3838

Supercurrent in a room-temperature Bose-Einstein magnon condensate

Dmytro A. Bozhko, Alexander A. Serga, Peter Clausen, Vitaliy I. Vasyuchka, Frank Heussner, Gennadii A. Melkov, 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

128 Citations (Scopus)

Abstract

A supercurrent is a macroscopic effect of a phase-induced collective motion of a quantum condensate. So far, experimentally observed supercurrent phenomena such as superconductivity and superfluidity have been restricted to cryogenic temperatures. Here, we report on the discovery of a supercurrent in a Bose-Einstein magnon condensate prepared in a room-temperature ferrimagnetic film. The magnon condensate is formed in a parametrically pumped magnon gas and is subject to a thermal gradient created by local laser heating of the film. The appearance of the supercurrent, which is driven by a thermally induced phase shift in the condensate wavefunction, is evidenced by analysis of the temporal evolution of the magnon density measured by means of Brillouin light scattering spectroscopy. Our findings offer opportunities for the investigation of room-temperature macroscopic quantum phenomena and their potential applications at ambient conditions.

Original language	English
Pages (from-to)	1057-1062
Number of pages	6
Journal	Nature Physics
Volume	12
Issue number	11
DOIs	https://doi.org/10.1038/nphys3838
Publication status	Published - 1 Nov 2016

Bibliographical note

Financial support from the Deutsche Forschungsgemeinschaft (project INST 161/544-3 within the Transregional Collaborative Research Centre SFB/TR 49 ‘Condensed Matter Systems with Variable Many-Body Interactions’ and project VA 735/1-2 within the priority programme SPP 1538 ‘Spin Caloric Transport’), from EU-FET (Grant InSpin 612759) and from the State Fund for Fundamental Research of Ukraine (SFFR) is gratefully acknowledged. D.A.B. is supported by a fellowship of the Graduate School Material Sciences in Mainz (MAINZ) through DFG funding of the Excellence Initiative (GSC-266). We are also indebted to Y. Tserkovnyak, S. Eggert, A. N. Slavin, V. S. Tiberkevich, K. Nakata, D. Loss and V. L. Pokrovsky for fruitful discussions. We also acknowledge I. I. Syvorotka (Scientific Research Company ‘Carat’, Lviv, Ukraine) for supplying us with the YIG film sample.

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1038/nphys3838

http://arxiv.org/abs/1503.00482Licence: Other

Cite this

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title = "Supercurrent in a room-temperature Bose-Einstein magnon condensate",

abstract = "A supercurrent is a macroscopic effect of a phase-induced collective motion of a quantum condensate. So far, experimentally observed supercurrent phenomena such as superconductivity and superfluidity have been restricted to cryogenic temperatures. Here, we report on the discovery of a supercurrent in a Bose-Einstein magnon condensate prepared in a room-temperature ferrimagnetic film. The magnon condensate is formed in a parametrically pumped magnon gas and is subject to a thermal gradient created by local laser heating of the film. The appearance of the supercurrent, which is driven by a thermally induced phase shift in the condensate wavefunction, is evidenced by analysis of the temporal evolution of the magnon density measured by means of Brillouin light scattering spectroscopy. Our findings offer opportunities for the investigation of room-temperature macroscopic quantum phenomena and their potential applications at ambient conditions.",

author = "Bozhko, {Dmytro A.} and Serga, {Alexander A.} and Peter Clausen and Vasyuchka, {Vitaliy I.} and Frank Heussner and Melkov, {Gennadii A.} and Anna Pomyalov and L'vov, {Victor S.} and Burkard Hillebrands",

note = "Financial support from the Deutsche Forschungsgemeinschaft (project INST 161/544-3 within the Transregional Collaborative Research Centre SFB/TR 49 {\textquoteleft}Condensed Matter Systems with Variable Many-Body Interactions{\textquoteright} and project VA 735/1-2 within the priority programme SPP 1538 {\textquoteleft}Spin Caloric Transport{\textquoteright}), from EU-FET (Grant InSpin 612759) and from the State Fund for Fundamental Research of Ukraine (SFFR) is gratefully acknowledged. D.A.B. is supported by a fellowship of the Graduate School Material Sciences in Mainz (MAINZ) through DFG funding of the Excellence Initiative (GSC-266). We are also indebted to Y. Tserkovnyak, S. Eggert, A. N. Slavin, V. S. Tiberkevich, K. Nakata, D. Loss and V. L. Pokrovsky for fruitful discussions. We also acknowledge I. I. Syvorotka (Scientific Research Company {\textquoteleft}Carat{\textquoteright}, Lviv, Ukraine) for supplying us with the YIG film sample.",

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AU - Bozhko, Dmytro A.

AU - Serga, Alexander A.

AU - Clausen, Peter

AU - Vasyuchka, Vitaliy I.

AU - Heussner, Frank

AU - Melkov, Gennadii A.

AU - Pomyalov, Anna

AU - L'vov, Victor S.

AU - Hillebrands, Burkard

N1 - Financial support from the Deutsche Forschungsgemeinschaft (project INST 161/544-3 within the Transregional Collaborative Research Centre SFB/TR 49 ‘Condensed Matter Systems with Variable Many-Body Interactions’ and project VA 735/1-2 within the priority programme SPP 1538 ‘Spin Caloric Transport’), from EU-FET (Grant InSpin 612759) and from the State Fund for Fundamental Research of Ukraine (SFFR) is gratefully acknowledged. D.A.B. is supported by a fellowship of the Graduate School Material Sciences in Mainz (MAINZ) through DFG funding of the Excellence Initiative (GSC-266). We are also indebted to Y. Tserkovnyak, S. Eggert, A. N. Slavin, V. S. Tiberkevich, K. Nakata, D. Loss and V. L. Pokrovsky for fruitful discussions. We also acknowledge I. I. Syvorotka (Scientific Research Company ‘Carat’, Lviv, Ukraine) for supplying us with the YIG film sample.

PY - 2016/11/1

Y1 - 2016/11/1

N2 - A supercurrent is a macroscopic effect of a phase-induced collective motion of a quantum condensate. So far, experimentally observed supercurrent phenomena such as superconductivity and superfluidity have been restricted to cryogenic temperatures. Here, we report on the discovery of a supercurrent in a Bose-Einstein magnon condensate prepared in a room-temperature ferrimagnetic film. The magnon condensate is formed in a parametrically pumped magnon gas and is subject to a thermal gradient created by local laser heating of the film. The appearance of the supercurrent, which is driven by a thermally induced phase shift in the condensate wavefunction, is evidenced by analysis of the temporal evolution of the magnon density measured by means of Brillouin light scattering spectroscopy. Our findings offer opportunities for the investigation of room-temperature macroscopic quantum phenomena and their potential applications at ambient conditions.

AB - A supercurrent is a macroscopic effect of a phase-induced collective motion of a quantum condensate. So far, experimentally observed supercurrent phenomena such as superconductivity and superfluidity have been restricted to cryogenic temperatures. Here, we report on the discovery of a supercurrent in a Bose-Einstein magnon condensate prepared in a room-temperature ferrimagnetic film. The magnon condensate is formed in a parametrically pumped magnon gas and is subject to a thermal gradient created by local laser heating of the film. The appearance of the supercurrent, which is driven by a thermally induced phase shift in the condensate wavefunction, is evidenced by analysis of the temporal evolution of the magnon density measured by means of Brillouin light scattering spectroscopy. Our findings offer opportunities for the investigation of room-temperature macroscopic quantum phenomena and their potential applications at ambient conditions.

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DO - 10.1038/nphys3838

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EP - 1062

JO - Nature Physics

JF - Nature Physics

IS - 11

ER -

Supercurrent in a room-temperature Bose-Einstein magnon condensate

Abstract

Bibliographical note

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