Optical and acoustic polaron formation: Dynamic matrix approach (DMA)

Jipdi, M.N.; Fokou, I.F.; Tchoffo, Martin; Fai, Lukong Cornelius

doi:10.1140/epjp/i2019-12902-9

Cited by 5 publications

(2 citation statements)

References 30 publications

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“…Here, we investigated the dispersion relation of the resulting system using Dynamic Matrix Approach (DMA) [7,42]. After expressing the modified operators in terms of non-perturbed variables ( l a c P , , q k 0 ), the phonon and magnon variables are redefined as in 20.…”

Section: Ferron's Dispersion Relationmentioning

confidence: 99%

“…From another perspective, a charge carrier (electron or hole) moving in a cluster is escorted by a local polarization due to atomic displacements; the latter generates a local distortion that propagates along with the cluster. At low temperatures, the complex carrier plus phonon forms a quasi-particle called polaron that can either be optical or acoustic [5][6][7]. Analogously, a magnetic polaron (or spin polaron) appears when a carrier moving in a magnetic medium is accompanied by deviations of localized spins.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Magnetic impurity inducing local defect of polarization and depletion of magnetization in magnetic cluster: blended ferron formation

Jipdi,

Dongmo,

Fai

et al. 2023

Phys. Scr.

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This paper presents a blended ferron in a ferromagnetic cluster wherethe electric polarization and magnetization tailor the quasi-particle characteristics.The resulting quasi-particle has coupled acoustic-polaron and ferron characteristics.The constant competition between electric polarization and magnetization alters theeffective mass thereby reducing the global inertia of the quasi-particle. The impuritysignificantly affects the environment, and the resulting defects in the polarization andmagnetization are soliton-like. It was observed that any gain in electric polarizationis conveyed by a drop in magnetization, where the hybridization of magnetization andpolarization gives rise to a new quasi-particle concept: a blended ferron. The latter ismanifested by the local deformation of the electric polarization and depletion of themagnetization in the cluster’s signature of magnetic reordering

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Section: Ferron's Dispersion Relationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%