Coherent ultrafast local spin-switching <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si0011.gif" overflow="scroll"><mml:mi>Λ</mml:mi></mml:math> processes in chainlike nanostructures with two identical magnetic centers

Li, Chun; Zhang, Shaobin; Jin, Wei; Xiang, Hongping; Lefkidis, Georgios; Hübner, Wolfgang

doi:10.1016/j.jmmm.2012.07.007

Cited by 8 publications

(1 citation statement)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[55] In our calculations, the Hamiltonian of strongly correlated systems is solved in four distinct steps. [56,57] (i) The first approximate geometry optimization of the system at the Hartree-Fock level. This serves as a starting geometry for the subsequent more detailed geometry adjustments, and produces the electronic reference states for the subsequent post-Hartree-Fock calculations.…”

Section: Theory and Methodsmentioning

confidence: 99%

Strain-modulated ultrafast magneto-optic dynamics of graphene nanoflakes decorated with transition-metal atoms*

Zhang¹,

Liu²,

Li³

et al. 2021

Chinese Phys. B

Self Cite

View full text Add to dashboard Cite

We perform first-principles calculations and coherent laser-matter interaction analyses to investigate the laser-induced ultrafast spin flip on graphene nanoflakes (GNFs) with transition metal elements attached on the boundary [TM&GNFs (TM = Fe, Co, Ni)]. It is shown that the spin-flip process on TM&GNFs is highly influenced by the involved element species and the position attached to the nanoflakes. Furthermore, taking Ni&GNF as an example, the first-principles tensile test predicts that the variation of the C–Ni bond length plays an important role in the spin density distribution, especially for the low-lying magnetic states, and can therefore dominate the spin-flip processes. The fastest spin-flip scenario is achieved within 80 fs in a Ni&GNF structure under 10% tensile strain along the C–Ni bond. The local deformation modulation of spin flip provides the precursory guidance for further study of ultrafast magnetization control in GNFs, which could lead to potential applications in future integrated straintronic devices.

show abstract

Section: Theory and Methodsmentioning

confidence: 99%

Strain-modulated ultrafast magneto-optic dynamics of graphene nanoflakes decorated with transition-metal atoms*

Zhang¹,

Liu²,

Li³

et al. 2021

Chinese Phys. B

Self Cite

View full text Add to dashboard Cite

show abstract

Strain assisted ultrafast spin switching on Co2@C60 endohedral fullerenes

Liu

Zhang

et al. 2015

Carbon

View full text Add to dashboard Cite

Photoinduced dynamics in an exchange-coupled trinuclear iron cluster

Liedy

Shi

Coletta

et al. 2020

Journal of Magnetism and Magnetic Materials

Self Cite

View full text Add to dashboard Cite

We present a joint experimental and computational study of the trinuclear basic carboxylate iron complex, which is a model system for understanding photoinduced ultrafast spin dynamics in magnetic iron-based transition metal oxides. We have carried out femtosecond optical transient absorption spectroscopy of molecules in solution at room-temperature exciting either at 400 or 520 nm and observed a long-lived excited-state absorption (ESA) signal from ca. 400 − 670 nm. The ESA signal is composed of several broad un-resolved bands at 405, 440 and 530 nm. The decay dynamics are complicated and three exponentials with corresponding decay time constants of τ 1 = 360 ± 30 fs, τ 2 = 5.3 ± 0.6 ps, τ 3 = 65 ± 5 ps and a constant offset (τ 4 > 500 ps) were needed to fit the data over the full wavelength range. The data indicate that the lowest excited state is populated within the duration of the excitation pulse (< 120 fs). Highly correlated coupled-cluster calculations can satisfactorily reproduce the experimental vibrational spectrum and highlight the role of the µ 3 −oxo bridge connecting the Fe ions to create a highly correlated ground-state and identify the excited state as having a mixture of both charge-transfer and ligand-field/d-orbital characters.

show abstract

Coherent ultrafast local spin-switching Λ processes in chainlike nanostructures with two identical magnetic centers

Cited by 8 publications

References 38 publications

Strain-modulated ultrafast magneto-optic dynamics of graphene nanoflakes decorated with transition-metal atoms*

Strain-modulated ultrafast magneto-optic dynamics of graphene nanoflakes decorated with transition-metal atoms*

Strain assisted ultrafast spin switching on Co2@C60 endohedral fullerenes

Photoinduced dynamics in an exchange-coupled trinuclear iron cluster

Contact Info

Product

Resources

About