Length scale for magnon-polaron formation from nonlocal spin transport

Babak Zare Rameshti, Rembert A. Duine

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

Uittreksel

We develop a theory for nonlocal spin transport through magnetic insulators that treats the coherent magnetoelastic interaction on equal footing with incoherent relaxation processes. In particular, our theory is able to describe the formation of magnon polarons, hybridized spin and elastic waves, near an interface where spin is injected into the magnetic insulator. Our theory is based on the stochastic Landau-Lifshitz-Gilbert equation coupled to stochastic equations of motion for the lattice displacement. By solving these equations, we obtain the charge voltage generated in a detector on one side of the magnetic insulator in response to spin biasing with an injector on the other side. We find that though magnon-polaron formation causes anomalous features in the spin transport, a length scale exists, however, below which magnetoelastic coupling does not affect the nonlocal spin current. This finding may motivate experiments to explore this aspect of magnon-phonon coupling in magnetic materials.

TaalEngels
Artikelnummer060402
Aantal pagina's5
TijdschriftPhysical Review B
Volume99
Nummer van het tijdschrift6
DOI's
StatusGepubliceerd - 7 feb 2019

Vingerafdruk

Gene Conversion
Polarons
Spin waves
Magnetic materials
Elastic waves
Relaxation processes
Equations of motion
Detectors
Electric potential
insulators
Experiments
polarons
magnetic materials
injectors
elastic waves
magnons
equations of motion
causes
detectors
electric potential

Citeer dit

@article{cbf86c5772f04260b2ca9b05cf65b1cd,
title = "Length scale for magnon-polaron formation from nonlocal spin transport",
abstract = "We develop a theory for nonlocal spin transport through magnetic insulators that treats the coherent magnetoelastic interaction on equal footing with incoherent relaxation processes. In particular, our theory is able to describe the formation of magnon polarons, hybridized spin and elastic waves, near an interface where spin is injected into the magnetic insulator. Our theory is based on the stochastic Landau-Lifshitz-Gilbert equation coupled to stochastic equations of motion for the lattice displacement. By solving these equations, we obtain the charge voltage generated in a detector on one side of the magnetic insulator in response to spin biasing with an injector on the other side. We find that though magnon-polaron formation causes anomalous features in the spin transport, a length scale exists, however, below which magnetoelastic coupling does not affect the nonlocal spin current. This finding may motivate experiments to explore this aspect of magnon-phonon coupling in magnetic materials.",
author = "{Zare Rameshti}, Babak and Duine, {Rembert A.}",
year = "2019",
month = "2",
day = "7",
doi = "10.1103/PhysRevB.99.060402",
language = "English",
volume = "99",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "6",

}

Length scale for magnon-polaron formation from nonlocal spin transport. / Zare Rameshti, Babak; Duine, Rembert A.

In: Physical Review B, Vol. 99, Nr. 6, 060402, 07.02.2019.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

TY - JOUR

T1 - Length scale for magnon-polaron formation from nonlocal spin transport

AU - Zare Rameshti,Babak

AU - Duine,Rembert A.

PY - 2019/2/7

Y1 - 2019/2/7

N2 - We develop a theory for nonlocal spin transport through magnetic insulators that treats the coherent magnetoelastic interaction on equal footing with incoherent relaxation processes. In particular, our theory is able to describe the formation of magnon polarons, hybridized spin and elastic waves, near an interface where spin is injected into the magnetic insulator. Our theory is based on the stochastic Landau-Lifshitz-Gilbert equation coupled to stochastic equations of motion for the lattice displacement. By solving these equations, we obtain the charge voltage generated in a detector on one side of the magnetic insulator in response to spin biasing with an injector on the other side. We find that though magnon-polaron formation causes anomalous features in the spin transport, a length scale exists, however, below which magnetoelastic coupling does not affect the nonlocal spin current. This finding may motivate experiments to explore this aspect of magnon-phonon coupling in magnetic materials.

AB - We develop a theory for nonlocal spin transport through magnetic insulators that treats the coherent magnetoelastic interaction on equal footing with incoherent relaxation processes. In particular, our theory is able to describe the formation of magnon polarons, hybridized spin and elastic waves, near an interface where spin is injected into the magnetic insulator. Our theory is based on the stochastic Landau-Lifshitz-Gilbert equation coupled to stochastic equations of motion for the lattice displacement. By solving these equations, we obtain the charge voltage generated in a detector on one side of the magnetic insulator in response to spin biasing with an injector on the other side. We find that though magnon-polaron formation causes anomalous features in the spin transport, a length scale exists, however, below which magnetoelastic coupling does not affect the nonlocal spin current. This finding may motivate experiments to explore this aspect of magnon-phonon coupling in magnetic materials.

UR - http://www.scopus.com/inward/record.url?scp=85061393348&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.99.060402

DO - 10.1103/PhysRevB.99.060402

M3 - Article

VL - 99

JO - Physical Review B

T2 - Physical Review B

JF - Physical Review B

SN - 2469-9950

IS - 6

M1 - 060402

ER -