Temperature dependent electron–phonon coupling and heat capacity in thin slabs of topological insulator Bi2Te3 as pertinent to the thermal spike model

Patra, Paramita; Srivastava, S. K.

doi:10.1016/j.nimb.2016.01.043

Cited by 1 publication

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“…Lin et al, 13 this way, have calculated electron temperature dependent electronic specific heats and electron phonon coupling strengths for a number of noble and transition metals, and have reported a substantial difference between the free-electron and full eDOS values. In a recent work, 17 we have shown how slight variations of g(ǫ) for different orientations of a thin Bi 2 Te 3 slab result into different C e (T e ) and G(T e ) curves.…”

Section: Introductionmentioning

confidence: 83%

Assessing a thermal spike model of swift heavy ion–matter interactions via Pd_1−xNi_x/Si interface mixing

Patra

Khan

Bala

et al. 2019

Phys. Chem. Chem. Phys.

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Thermal spike model (TSM) is presently a widely accepted mechanism of swift heavy ion (SHI) -matter interaction. It provides explanation to various SHI induced effects including mixing across interfaces. The model involves electron-phonon (e-p) coupling to predict the evolution of lattice temperature with time. SHI mixing is considered to be a result of diffusion in transient molten state thus achieved. In this work, we assess this conception primarily via tuning the e-p coupling strength by taking a series Pd1−xNix of a completely solid soluble binary, and then observing 100 MeV Au ion induced mixing across Pd1−xNix/Si interfaces. The extent of mixing has been parametrised by the irradiation induced change ∆σ 2 in variances of Pd and Ni depth profiles derived from X-ray photoelectron spectroscopy. The x-dependence of ∆σ 2 follows a curve that is concave upward with a prominent minimum. Theoretically, e-p coupling strength determined using density functional theory has been used to solve the equations appropriate to TSM, and then an equivalent quantity L 2 proportional to ∆σ 2 has been calculated. L 2 , however, increases monotonically with x without any minimum, bringing out a convincing disparity between experiment and theory. Perhaps some mechanisms more than the TSM plus the transient molten state diffusion are operative, which can not be foreseen at this point of time.

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Section: Introductionmentioning

confidence: 83%

Assessing a thermal spike model of swift heavy ion–matter interactions via Pd_1−xNi_x/Si interface mixing

Patra

Khan

Bala

et al. 2019

Phys. Chem. Chem. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

Temperature dependent electron–phonon coupling and heat capacity in thin slabs of topological insulator Bi2Te3 as pertinent to the thermal spike model

Cited by 1 publication

References 19 publications

Assessing a thermal spike model of swift heavy ion–matter interactions via Pd_1−xNi_x/Si interface mixing

Assessing a thermal spike model of swift heavy ion–matter interactions via Pd_1−xNi_x/Si interface mixing

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Temperature dependent electron–phonon coupling and heat capacity in thin slabs of topological insulator Bi2Te3 as pertinent to the thermal spike model

Cited by 1 publication

References 19 publications

Assessing a thermal spike model of swift heavy ion–matter interactions via Pd1−xNix/Si interface mixing

Assessing a thermal spike model of swift heavy ion–matter interactions via Pd1−xNix/Si interface mixing

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Assessing a thermal spike model of swift heavy ion–matter interactions via Pd_1−xNi_x/Si interface mixing

Assessing a thermal spike model of swift heavy ion–matter interactions via Pd_1−xNi_x/Si interface mixing