Bose-Einstein Condensation of Magnons and Spin Superfluidity in the Polar Phase of HE 3

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Bose-Einstein Condensation of Magnons and Spin Superfluidity in the Polar Phase of HE 3. / Autti, S.; Dmitriev, V. V.; Mäkinen, J. T.; Rysti, J.; Soldatov, A. A.; Volovik, G. E.; Yudin, A. N.; Eltsov, V. B.

julkaisussa: Physical Review Letters, Vuosikerta 121, Nro 2, 025303, 12.07.2018, s. 1-6.

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

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Bibtex - Lataa

@article{c5e67bb83c254871807f1fc92c08a72a,
title = "Bose-Einstein Condensation of Magnons and Spin Superfluidity in the Polar Phase of HE 3",
abstract = "The polar phase of He3, which is topological spin-triplet superfluid with the Dirac nodal line in the spectrum of Bogoliubov quasiparticles, has been recently stabilized in a nanoconfined geometry. We pump magnetic excitations (magnons) into the sample of polar phase and observe how they form a Bose-Einstein condensate, revealed by coherent precession of the magnetization of the sample. Spin superfluidity, which supports this coherence, is associated with the spontaneous breaking of U(1) symmetry by the phase of precession. We observe the corresponding Nambu-Goldstone boson and measure its mass emerging when applied rf field violates the U(1) symmetry explicitly. We suggest that the magnon BEC in the polar phase is a powerful probe for topological objects such as vortices and solitons and topological nodes in the fermionic spectrum.",
author = "S. Autti and Dmitriev, {V. V.} and M{\"a}kinen, {J. T.} and J. Rysti and Soldatov, {A. A.} and Volovik, {G. E.} and Yudin, {A. N.} and Eltsov, {V. B.}",
note = "| openaire: EC/H2020/694248/EU//TOPVAC",
year = "2018",
month = "7",
day = "12",
doi = "10.1103/PhysRevLett.121.025303",
language = "English",
volume = "121",
pages = "1--6",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "2",

}

RIS - Lataa

TY - JOUR

T1 - Bose-Einstein Condensation of Magnons and Spin Superfluidity in the Polar Phase of HE 3

AU - Autti, S.

AU - Dmitriev, V. V.

AU - Mäkinen, J. T.

AU - Rysti, J.

AU - Soldatov, A. A.

AU - Volovik, G. E.

AU - Yudin, A. N.

AU - Eltsov, V. B.

N1 - | openaire: EC/H2020/694248/EU//TOPVAC

PY - 2018/7/12

Y1 - 2018/7/12

N2 - The polar phase of He3, which is topological spin-triplet superfluid with the Dirac nodal line in the spectrum of Bogoliubov quasiparticles, has been recently stabilized in a nanoconfined geometry. We pump magnetic excitations (magnons) into the sample of polar phase and observe how they form a Bose-Einstein condensate, revealed by coherent precession of the magnetization of the sample. Spin superfluidity, which supports this coherence, is associated with the spontaneous breaking of U(1) symmetry by the phase of precession. We observe the corresponding Nambu-Goldstone boson and measure its mass emerging when applied rf field violates the U(1) symmetry explicitly. We suggest that the magnon BEC in the polar phase is a powerful probe for topological objects such as vortices and solitons and topological nodes in the fermionic spectrum.

AB - The polar phase of He3, which is topological spin-triplet superfluid with the Dirac nodal line in the spectrum of Bogoliubov quasiparticles, has been recently stabilized in a nanoconfined geometry. We pump magnetic excitations (magnons) into the sample of polar phase and observe how they form a Bose-Einstein condensate, revealed by coherent precession of the magnetization of the sample. Spin superfluidity, which supports this coherence, is associated with the spontaneous breaking of U(1) symmetry by the phase of precession. We observe the corresponding Nambu-Goldstone boson and measure its mass emerging when applied rf field violates the U(1) symmetry explicitly. We suggest that the magnon BEC in the polar phase is a powerful probe for topological objects such as vortices and solitons and topological nodes in the fermionic spectrum.

UR - http://www.scopus.com/inward/record.url?scp=85049886587&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.121.025303

DO - 10.1103/PhysRevLett.121.025303

M3 - Article

VL - 121

SP - 1

EP - 6

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 2

M1 - 025303

ER -

ID: 27177110