Coherent magnon dynamics in ferromagnetic models with nonuniform magnetic field and correlated disorder

Nunes, D.M.; Neto, Adhemar Ranciaro; Moura, F. A. B. F. de

doi:10.1016/j.jmmm.2016.03.026

Cited by 5 publications

(2 citation statements)

References 19 publications

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“…The Fourier transform (Figure b, b, and b) showed a single peak around the

ω \approx E

and thus in good agreement with the coherent electronic dynamics shown in Figure a, a, and a. The single narrow peak around ω ≈ E suggests that the results found are, indeed, apparent BO with frequency roughly equal to the frequency predicted by the semiclassical formalism . In Figure a,b, we show our results for

γ = 0.00001

and

E = 0.5

0.7

, and

0.9

.…”

Section: Resultssupporting

confidence: 84%

“…The single narrow peak around ω % E suggests that the results found are, indeed, apparent BO [3][4][5][6][7][8][9][10][11] with frequency roughly equal to the frequency predicted by the semiclassical formalism. [28,29] In Figure 5a,b, we show our results for γ ¼ 0.00001 and E ¼ 0.5,0.7, and 0.9. Based on Figure 5a,b, we note that the electron remains trapped around the initial position and exhibits an oscillatory behavior with frequency roughly ω ¼ E. We did a lot of calculations for several values of E and γ, and analyzed the Fourier transform of the electronic position.…”

Section: Figure 2amentioning

confidence: 98%

See 1 more Smart Citation

Wave‐Packet Dynamics in Chains with Disorder‐Type Ornstein–Uhlenbeck and Static Electric Field

Soares

Neto

Sales

et al. 2020

Physica Status Solidi (b)

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Herein, the electronic dynamics in a 1D model with correlated disorder and under the influence of a static electric field is considered. In the framework, the diagonal disorder is obtained from an Ornstein–Uhlenbeck (OU) process. The Schrödinger equation considering an initial Gaussian wave packet with width l located at the center of chain will be solved. To understand the competition between the OU‐like disorder and the electric field, the time evolution of the electronic mean position is calculated. The results suggest that chains with diagonal disorder generated from OU process with small viscosity coefficient seem to exhibit apparent Bloch oscillations (BO) with dominant frequency roughly ω ≈ E. In addition, the stability of these apparent BO along the time is investigated.

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“…The Fourier transform (Figure b, b, and b) showed a single peak around the