Charge transfer in alkaline-earth metal graphite intercalation compounds

被引：0

作者：

Zinni, Justine ^{[1
]}

Camerano, Luigi ^{[2
]}

Speyer, Lucie ^{[1
]}

Cahen, Sebastien ^{[1
]}

El Hajj, Inass ^{[1
]}

Bolmont, Mickael ^{[1
]}

Medjahdi, Ghouti ^{[1
]}

Lagrange, Philippe ^{[1
]}

Lamura, Gianrico ^{[3
]}

Profeta, Gianni ^{[2
,4
]}

Herold, Claire ^{[1
]}

机构：

[1] Univ Lorraine, IJL, CNRS, 2 Allee Andre Guinier, F-54011 Nancy, France

[2] Univ Aquila, Dept Phys & Chem Sci, Via Vetoio, I-67100 Laquila, Italy

[3] CNR SPIN, Corso Perrone 24, I-16152 Genoa, Italy

[4] Univ Aquila, SPIN CNR, Via Vetoio 10, I-67100 Laquila, Italy

来源：

CARBON | 2024年 / 230卷

关键词：

Graphite intercalation compounds; Alkaline-earth metals; Charge transfer; X-ray diffraction; Raman spectroscopy; Density functional theory calculations; EFFICIENT MEDIUM; BOND-LENGTH; SUPERCONDUCTIVITY; LITHIUM; TOOL;

D O I：

10.1016/j.carbon.2024.119652

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The charge transfer from a metal atom towards the carbon layers in first stage graphite intercalation compounds (GIC) is a fundamental issue to explain under which conditions superconductivity sets in and the electronic properties of such ground state. To study in detail the transfer process and its evolution as a function of the nature of the intercalated metal, and especially taking in consideration the interlayer distance, we performed detailed X-Ray Diffraction and Raman scattering measurements on very high-quality bulk intercalated CaC6, SrC6 and BaC6 samples. We combined both the experimental results with detailed density functional theory calculations to give a coherent picture in which it is possible to follow the evolution of the charge transfer to the carbon layer in full agreement with the experimental data. The full comprehension of such mechanism remains a fundamental issue to explain the variation of the superconducting ground state in first stage GIC.

引用

页数：7

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