Erratum: High-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>T</mml:mi><mml:mi>c</mml:mi></mml:msub></mml:math>spin superfluidity in antiferromagnets [Phys. Rev. Lett.<b>108</b>, 177002 (2012)]

Bunkov, Yu. M.; Alakshin, E. M.; Gazizulin, R. R.; Klochkov, A. V.; Kuzmin, V. V.; L’vov, Victor S.; Tagirov, M. S.

doi:10.1103/physrevlett.110.109901

Cited by 13 publications

(25 citation statements)

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“…In the case of high temperatures we have N(µ, T ) ≃ N(0, T ). Substituting the thermal density (16) into (15), we obtain the opposite relation: 2.61 > 1. In other words, magnon gas which undergoes Bose-Einstein condensation is always a degenerate bose gas.…”

Section: Bec In a Ferromagnetmentioning

confidence: 99%

“…[6][7][8]. Currently magnon BEC found in different magnetic systems: i) in antiferromagnetic superfluid 3 He-A [9,10]; ii) in in-plane magnetized yttrium iron garnet Y 3 Fe 5 O 12 (YIG) film (with two minima in the magnon spectrum) [11,12] and in normally magnetized YIG film [13]; iii) in antiferromagnets MnCO 3 and CsMnF 3 with Suhl-Nakamura indirect nuclear spin-spin interaction [14][15][16]. An explanation of analogy between the atomic and magnon BEC is given in Ref.…”

Section: Introductionmentioning

confidence: 99%

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Magnon condensation and spin superfluidity

Bunkov

Safonov

2018

Journal of Magnetism and Magnetic Materials

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We consider the Bose-Einstein condensation (BEC) of quasi-equilibrium magnons which leads to spin superfluidity, the coherent quantum transfer of magnetization in magnetic material. The critical conditions for excited magnon density in ferro-and antiferromagnets, bulk and thin films, are estimated and discussed. It was demonstrated that only the highly populated region of the spectrum is responsible for the emergence of any BEC. This finding substantially simplifies the BEC theoretical analysis and is surely to be used for simulations. It is shown that the conditions of magnon BEC in the perpendicular magnetized YIG thin film is fulfillied at small angle, when signals are treated as excited spin waves. We also predict that the magnon BEC should occur in the antiferromagnetic hematite at room temperature at much lower excited magnon density compared to that of ferromagnetic YIG. Bogoliubov's theory of Bose-Einstein condensate is generalized to the case of multi-particle interactions. The six-magnon repulsive interaction may be responsible for the BEC stability in ferro-and antiferromagnets where the four-magnon interaction is attractive.

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Section: Bec In a Ferromagnetmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Magnon condensation and spin superfluidity

Bunkov

Safonov

2018

Journal of Magnetism and Magnetic Materials

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“…In [20], it was shown that the dynamical properties of the magnetic resonance in some antiferromagnets are similar to those of 3 He-A. Later BEC of nuclear magnons with k = 0, but quite different physical properties than nuclear magnons in 3 He, was experimentally observed in the easy-plane antiferromagnets CsMnF 3 and MnCO 3 at liquid helium temperature T = 1.5 K [21,22]. In this work, we focus theoretically on nontrivial conditions of BEC of nuclear magnons in the easy-plane antiferromagnets.…”

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confidence: 92%

Critical parameters of nuclear magnon Bose–Einstein condensation in systems with dynamic frequency shift

Gazizulin

Bunkov

Safonov³

2015

Jetp Lett.

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The critical conditions for the Bose-Einstein condensation of quasi equilibrium nuclear magnons in the easy-plane antiferromagnets CsMnF 3 and MnCO 3 are theoretically derived. Both systems possess the dynamic frequency shift, the dependence of the precession frequency on the magnetization deflection angle and one is able to observe the magnetic resonance signals in very non-equilibrium conditions when the frequency of pumping is higher than precession frequency. The frequency difference in this case can be compensated by increasing the deflection angle.

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“…This simplified the discovery of BEC and spin supercurrent. Later these phenomena were found in many other systems, like antiferromagnets with Suhl-Nakamura interaction (CsMnF 3 , MnCO 3 and so on) [6]. They were also found in YIG films [7].…”

Section: Introductionmentioning

confidence: 95%

Influence of dilution in the spin transport in the quantum anisotropic two-dimensional Heisenberg antiferromagnet

Lima

2016

Journal of Magnetism and Magnetic Materials

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Erratum: High-Tcspin superfluidity in antiferromagnets [Phys. Rev. Lett.108, 177002 (2012)]

Cited by 13 publications

References 2 publications

Magnon condensation and spin superfluidity

Magnon condensation and spin superfluidity

Critical parameters of nuclear magnon Bose–Einstein condensation in systems with dynamic frequency shift

Influence of dilution in the spin transport in the quantum anisotropic two-dimensional Heisenberg antiferromagnet

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