High-pressure Raman study of the alkaline-earth metal fulleride, Ca2.75C60

被引：3

作者：

Terzidou, A. G., V ^{[1
]}

Nakagawa, T. ^{[2
]}

Yoshikane, N. ^{[3
]}

Rountou, R. ^{[1
]}

Rix, J. ^{[1
,4
]}

Karabinaki, O. ^{[5
,6
]}

Christofilos, D. ^{[5
,6
]}

Arvanitidis, J. ^{[1
]}

Prassides, K. ^{[3
,7
]}

机构：

[1] Aristotle Univ Thessaloniki, Phys Dept, Thessaloniki 124, Greece

[2] Ctr High Pressure Sci & Technol Adv Res, Beijing 100094, Peoples R China

[3] Osaka Prefecture Univ, Grad Sch Engn, Dept Mat Sci, Osaka 5998531, Japan

[4] Freiberg Univ Min & Technol, Inst Theoret Phys, Leipziger Str 23, D-09599 Freiberg, Germany

[5] Aristotle Univ Thessaloniki, Fac Engn, Sch Chem Engn, Thessaloniki 4124, Greece

[6] Aristotle Univ Thessaloniki, Fac Engn, Lab Phys, Thessaloniki 4124, Greece

[7] Tohoku Univ, Adv Inst Mat Res WPI AIMR, Sendai, Miyagi 9808577, Japan

来源：

MODERN PHYSICS LETTERS B | 2020年 / 34卷 / 19-20期

关键词：

Fullerides; strongly correlated electron systems; Raman spectroscopy; high pressure; ELECTRONIC-PROPERTIES; LATTICE COLLAPSE; C-60; SUPERCONDUCTIVITY; FULLERENES; TRANSITION; SCATTERING; SM2.75C60;

D O I：

10.1142/S0217984920400564

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The structural stability and electronic properties of Ca2.75C60 are probed by means of high-pressure Raman spectroscopy using two different pressure transmitting media that lead to practically identical results. Although Ca(2)(.)(75)C(60 )is isostructural with the rare-earth metal fulleride, Sm2.75C60 of the same stoichiometry, the pressure coefficients of characteristic intramolecular C-60 modes are larger than those in the Sm2.75C60 counterpart but similar to those in the pristine C-60 solid. Since the reduced pressure coefficients in the Sm fulleride have been attributed to strong Sm-C-60 coupling, our findings for the isostructural Ca fulleride are compatible with a reduced orbital mixing and Ca-C-60 coupling.

引用

页数：10

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