3D Thermal Spike Simulation: Swift Heavy Ion Irradiation of Embedded a-SiC Nano-Zone Inside 4H-SiC

Chakravorty, Anusmita; Dufour, C.; Kabiraj, D.

doi:10.1007/978-981-19-2572-6_2

Cited by 1 publication

(1 citation statement)

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“…The ion-induced surface hillocks are observed more often in two material categories, namely ionic fluoride crystals such as LiF, CaF 2 , BaF 2 , and LaF 3 [3][4][5][6], as well as oxide materials like TiO 2 , Y 3 Fe 5 O 12 , Al 2 O 3 , SiO 2 , MgO and LiNbO 3 [7][8][9][10][11][12]. The most common scenario for the mechanism, which describes the creation of hillocks by swift heavy ions, is what is termed modified thermal spike model [13,14]. It describes the formation of ion track in two consequent steps by the initial ion induced strong electronic excitations, in a time scale of 10 −18 to 10 −15 s, and the subsequent coupling between the thermalized emitted electrons and the phonons.…”

Section: Introductionmentioning

confidence: 99%

Nanostructuring of strontium titanate by highly energetic ions induced plasma

El-Said,

Moslem,

Tolba

et al. 2023

Phys. Scr.

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Highly energetic heavy ions are efficient tool in surface nanostructuring of various materials. The irradiation of strontium titanate with GeV xenon ions leads to the creation of surface nanohillocks, where each hillock is produced by single ion impact. We focus on the creation mechanism of the nano-sized hillocks by presenting a new approach, which is based on the ability of the ion-induced strong electronic excitations in forming localized plasma. The creation of nano-plasma leads to the existence of nonlinear ion-acoustic mode that propagates in the plasma as an indicator to the feature of the nanohillock. The solution of the plasma hydrodynamic equations showed a bell-shape relation between the normalized electron number density and distance along the crystal. The similarity to the hillock profile implies the importance of electron density in producing the observed surface structures. Furthermore, the utilized model explains the creation mechanism of hillocks-like structures in case of normal incidence as well as grazing incidence of highly energetic heavy ions.

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