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Magnon-Mediated Indirect Exciton Condensation through Antiferromagnetic Insulators
Mesoscale and Nanoscale Physics · Submitted 29 Apr 2019
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim The magnon-mediated interaction is expected to cooperate with the Coulomb interaction for condensation of indirect excitons, thereby providing a means to significantly increase the exciton condensation temperature range.
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The abstract, sentence by sentence
Electrons and holes residing on the opposing sides of an insulating barrier and experiencing an attractive Coulomb interaction can spontaneously form a coherent state known as an indirect exciton condensate. We study a trilayer system where the barrier is an antiferromagnetic insulator. The electrons and holes here additionally interact via interfacial coupling to the antiferromagnetic magnons. We show that by employing magnetically uncompensated interfaces, we can design the magnon-mediated interaction to be attractive or repulsive by varying the thickness of the antiferromagnetic insulator by a single atomic layer. We derive an analytical expression for the critical temperature $T_c$ of the indirect exciton condensation. Within our model, anisotropy is found to be crucial for achieving a finite $T_c$, which increases with the strength of the exchange interaction in the antiferromagnetic bulk. For realistic material parameters, we estimate $T_c$ to be around 7 K, the same order of magnitude as the current experimentally achievable exciton condensation where the attraction is solely due to the Coulomb interaction. The magnon-mediated interaction is expected to cooperate with the Coulomb interaction for condensation of indirect excitons, thereby providing a means to significantly increase the exciton condensation temperature range.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | Electrons and holes residing on the opposing sides of an insulating barrier and experiencing an attractive Coulomb interaction can spontaneously form a coherent state known as an indirect exciton condensate. | background 1.00 | 0.05 | 0.03 | asserted 0.98 |
| s1 | We study a trilayer system where the barrier is an antiferromagnetic insulator. | contribution 0.87 | 0.64 | 0.03 | asserted 0.98 |
| s2 | The electrons and holes here additionally interact via interfacial coupling to the antiferromagnetic magnons. | contribution 0.47 | 0.19 | 0.04 | asserted 1.00 |
| s3 | We show that by employing magnetically uncompensated interfaces, we can design the magnon-mediated interaction to be attractive or repulsive by varying the thickness of the antiferromagnetic insulator by a single atomic layer. | result 0.75 | 0.94 | 0.19 | asserted 0.99 |
| s4 | We derive an analytical expression for the critical temperature $T_c$ of the indirect exciton condensation. | contribution 0.63 | 0.97 | 0.07 | asserted 1.00 |
| s5 | Within our model, anisotropy is found to be crucial for achieving a finite $T_c$, which increases with the strength of the exchange interaction in the antiferromagnetic bulk. | result 0.99 | 0.95 | 0.12 | asserted 1.00 |
| s6 | For realistic material parameters, we estimate $T_c$ to be around 7 K, the same order of magnitude as the current experimentally achievable exciton condensation where the attraction is solely due to the Coulomb interaction. | result 0.99 | 0.87 | 0.17 | asserted 0.72 |
| s7 | The magnon-mediated interaction is expected to cooperate with the Coulomb interaction for condensation of indirect excitons, thereby providing a means to significantly increase the exciton condensation temperature range. | interpretation 1.00 | 0.38 | 0.74 | hedged possibility 0.93 |
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Original abstract
Electrons and holes residing on the opposing sides of an insulating barrier and experiencing an attractive Coulomb interaction can spontaneously form a coherent state known as an indirect exciton condensate. We study a trilayer system where the barrier is an antiferromagnetic insulator. The electrons and holes here additionally interact via interfacial coupling to the antiferromagnetic magnons. We show that by employing magnetically uncompensated interfaces, we can design the magnon-mediated interaction to be attractive or repulsive by varying the thickness of the antiferromagnetic insulator by a single atomic layer. We derive an analytical expression for the critical temperature $T_c$ of the indirect exciton condensation. Within our model, anisotropy is found to be crucial for achieving a finite $T_c$, which increases with the strength of the exchange interaction in the antiferromagnetic bulk. For realistic material parameters, we estimate $T_c$ to be around 7 K, the same order of magnitude as the current experimentally achievable exciton condensation where the attraction is solely due to the Coulomb interaction. The magnon-mediated interaction is expected to cooperate with the Coulomb interaction for condensation of indirect excitons, thereby providing a means to significantly increase the exciton condensation temperature range.
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How the literature uses it
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Papers citing it
Cites it as background 1 paper
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Magnon-mediated indirect exciton condensation has also been predicted recently [ref] .
Enhancement of superconductivity mediated by antiferromagnetic squeezed magnons · Introduction · 0.93
What it cites · 3 sentences without a confident label
Cites as background 2 papers
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Theoretical predictions of electron-magnon interactions have shown that these can also induce effects such as superconductivity [ref] .
Enhancement of superconductivity mediated by antiferromagnetic squeezed magnons · Introduction · 0.80
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Theoretical predictions of electron-magnon interactions have shown that these can also induce effects such as superconductivity [ref] .
Superconductivity at metal-antiferromagnetic insulator interfaces · Introduction · 0.80
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