Magnon coherent conductance via atomic nanocontacts

B. Bourahla, A. Khater, R. Tigrine, O. Rafil, M. Abou Ghantous

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

A calculation for the coherent scattering and conductance of magnons via atomic nanocontacts is presented. The model system is composed of two groups of semi-infinite magnetically ordered Heisenberg monatomic chains, joined together by the magnetic nanocontact, and the system is supported on a non-magnetic substrate and considered otherwise free from magnetic interactions. The coherent transmission and reflection coefficients are derived as elements of a Landauer-type scattering matrix. Transmission and reflection scattering cross sections are calculated specifically for three distinct symmetric and asymmetric geometric configurations of the nanocontact. Three cases of local magnetic exchange on the nanocontact domain are analysed for each configuration to investigate the influence of softening and hardening of the magnetic boundary conditions. In analogy with coherent electronic transport, we calculate the magnon coherent transport. The numerical results show the interference effects between the incident scattered magnons and the localized spin states on the nanocontact, with characteristic Fano resonances. The numerical results yield an understanding of the relationship between the coherent magnon conductance and the architecture of the embedded magnetic nanocontact.

Original languageEnglish
Article number266208
JournalJournal of Physics Condensed Matter
Volume19
Issue number26
DOIs
Publication statusPublished - 4 Jul 2007
Externally publishedYes

Fingerprint

magnons
Scattering
Coherent scattering
coherent radiation
coherent scattering
S matrix theory
configurations
hardening
scattering cross sections
softening
Hardening
Boundary conditions
boundary conditions
reflectance
interference
Substrates
coefficients
electronics
interactions

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Bourahla, B., Khater, A., Tigrine, R., Rafil, O., & Abou Ghantous, M. (2007). Magnon coherent conductance via atomic nanocontacts. Journal of Physics Condensed Matter, 19(26), [266208]. https://doi.org/10.1088/0953-8984/19/26/266208

Magnon coherent conductance via atomic nanocontacts. / Bourahla, B.; Khater, A.; Tigrine, R.; Rafil, O.; Abou Ghantous, M.

In: Journal of Physics Condensed Matter, Vol. 19, No. 26, 266208, 04.07.2007.

Research output: Contribution to journalArticle

Bourahla, B, Khater, A, Tigrine, R, Rafil, O & Abou Ghantous, M 2007, 'Magnon coherent conductance via atomic nanocontacts', Journal of Physics Condensed Matter, vol. 19, no. 26, 266208. https://doi.org/10.1088/0953-8984/19/26/266208
Bourahla B, Khater A, Tigrine R, Rafil O, Abou Ghantous M. Magnon coherent conductance via atomic nanocontacts. Journal of Physics Condensed Matter. 2007 Jul 4;19(26). 266208. https://doi.org/10.1088/0953-8984/19/26/266208
Bourahla, B. ; Khater, A. ; Tigrine, R. ; Rafil, O. ; Abou Ghantous, M. / Magnon coherent conductance via atomic nanocontacts. In: Journal of Physics Condensed Matter. 2007 ; Vol. 19, No. 26.
@article{5bff42c34f9c4190bca8b4a4103a8227,
title = "Magnon coherent conductance via atomic nanocontacts",
abstract = "A calculation for the coherent scattering and conductance of magnons via atomic nanocontacts is presented. The model system is composed of two groups of semi-infinite magnetically ordered Heisenberg monatomic chains, joined together by the magnetic nanocontact, and the system is supported on a non-magnetic substrate and considered otherwise free from magnetic interactions. The coherent transmission and reflection coefficients are derived as elements of a Landauer-type scattering matrix. Transmission and reflection scattering cross sections are calculated specifically for three distinct symmetric and asymmetric geometric configurations of the nanocontact. Three cases of local magnetic exchange on the nanocontact domain are analysed for each configuration to investigate the influence of softening and hardening of the magnetic boundary conditions. In analogy with coherent electronic transport, we calculate the magnon coherent transport. The numerical results show the interference effects between the incident scattered magnons and the localized spin states on the nanocontact, with characteristic Fano resonances. The numerical results yield an understanding of the relationship between the coherent magnon conductance and the architecture of the embedded magnetic nanocontact.",
author = "B. Bourahla and A. Khater and R. Tigrine and O. Rafil and {Abou Ghantous}, M.",
year = "2007",
month = "7",
day = "4",
doi = "10.1088/0953-8984/19/26/266208",
language = "English",
volume = "19",
journal = "Journal of Physics Condensed Matter",
issn = "0953-8984",
publisher = "IOP Publishing Ltd.",
number = "26",

}

TY - JOUR

T1 - Magnon coherent conductance via atomic nanocontacts

AU - Bourahla, B.

AU - Khater, A.

AU - Tigrine, R.

AU - Rafil, O.

AU - Abou Ghantous, M.

PY - 2007/7/4

Y1 - 2007/7/4

N2 - A calculation for the coherent scattering and conductance of magnons via atomic nanocontacts is presented. The model system is composed of two groups of semi-infinite magnetically ordered Heisenberg monatomic chains, joined together by the magnetic nanocontact, and the system is supported on a non-magnetic substrate and considered otherwise free from magnetic interactions. The coherent transmission and reflection coefficients are derived as elements of a Landauer-type scattering matrix. Transmission and reflection scattering cross sections are calculated specifically for three distinct symmetric and asymmetric geometric configurations of the nanocontact. Three cases of local magnetic exchange on the nanocontact domain are analysed for each configuration to investigate the influence of softening and hardening of the magnetic boundary conditions. In analogy with coherent electronic transport, we calculate the magnon coherent transport. The numerical results show the interference effects between the incident scattered magnons and the localized spin states on the nanocontact, with characteristic Fano resonances. The numerical results yield an understanding of the relationship between the coherent magnon conductance and the architecture of the embedded magnetic nanocontact.

AB - A calculation for the coherent scattering and conductance of magnons via atomic nanocontacts is presented. The model system is composed of two groups of semi-infinite magnetically ordered Heisenberg monatomic chains, joined together by the magnetic nanocontact, and the system is supported on a non-magnetic substrate and considered otherwise free from magnetic interactions. The coherent transmission and reflection coefficients are derived as elements of a Landauer-type scattering matrix. Transmission and reflection scattering cross sections are calculated specifically for three distinct symmetric and asymmetric geometric configurations of the nanocontact. Three cases of local magnetic exchange on the nanocontact domain are analysed for each configuration to investigate the influence of softening and hardening of the magnetic boundary conditions. In analogy with coherent electronic transport, we calculate the magnon coherent transport. The numerical results show the interference effects between the incident scattered magnons and the localized spin states on the nanocontact, with characteristic Fano resonances. The numerical results yield an understanding of the relationship between the coherent magnon conductance and the architecture of the embedded magnetic nanocontact.

UR - http://www.scopus.com/inward/record.url?scp=34250736373&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34250736373&partnerID=8YFLogxK

U2 - 10.1088/0953-8984/19/26/266208

DO - 10.1088/0953-8984/19/26/266208

M3 - Article

C2 - 21694085

AN - SCOPUS:34250736373

VL - 19

JO - Journal of Physics Condensed Matter

JF - Journal of Physics Condensed Matter

SN - 0953-8984

IS - 26

M1 - 266208

ER -