Rotational dynamics of C 60 in superconducting K 3 Ba 3 C 60

Serena Margadonna; Wen Zhi Li; Kosmas Prassides; D. A. Neumann

doi:10.1016/S0009-2614(00)00454-1

Rotational dynamics of C ₆₀ in superconducting K ₃ Ba ₃ C ₆₀

Serena Margadonna, Wen Zhi Li, Kosmas Prassides, D. A. Neumann

Advanced Institute for Materials Research (AIMR)

Research output: Contribution to journal › Article

1 Citation (Scopus)

Abstract

The orientational dynamics of C₆₀ in superconducting K₃Ba₃C₆₀ are studied by neutron inelastic scattering. Low-energy excitations are present near ~6 meV between 150 and 320 K and are assigned to small-amplitude librations of the C₆₀^9- ions. They are harder and broader than those measured in K₃C₆₀, reflecting the existence of a stronger and more anisotropic orientational potential. The anisotropy and dispersion effects are also larger than those in isostructural Rb₆C₆₀, as a result of positional disorder of the Ba²⁺ and K⁺ ions, which reside in distorted tetrahedral interstices. The estimated barrier of the hindrance potential, E_a, is ~1.4 eV.

Original language	English
Pages (from-to)	472-476
Number of pages	5
Journal	Chemical Physics Letters
Volume	322
Issue number	6
DOIs	https://doi.org/10.1016/S0009-2614(00)00454-1
Publication status	Published - 2000 Jun 2

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

Access to Document

10.1016/S0009-2614(00)00454-1

Fingerprint Dive into the research topics of 'Rotational dynamics of C 60 in superconducting K 3 Ba 3 C 60'. Together they form a unique fingerprint.

Cite this

Margadonna, S., Li, W. Z., Prassides, K., & Neumann, D. A. (2000). Rotational dynamics of C ₆₀ in superconducting K ₃ Ba ₃ C ₆₀. Chemical Physics Letters, 322(6), 472-476. https://doi.org/10.1016/S0009-2614(00)00454-1

@article{34a722925d9542aea06ce31555565979,

title = "Rotational dynamics of C 60 in superconducting K 3 Ba 3 C 60",

abstract = "The orientational dynamics of C60 in superconducting K3Ba3C60 are studied by neutron inelastic scattering. Low-energy excitations are present near ~6 meV between 150 and 320 K and are assigned to small-amplitude librations of the C609- ions. They are harder and broader than those measured in K3C60, reflecting the existence of a stronger and more anisotropic orientational potential. The anisotropy and dispersion effects are also larger than those in isostructural Rb6C60, as a result of positional disorder of the Ba2+ and K+ ions, which reside in distorted tetrahedral interstices. The estimated barrier of the hindrance potential, Ea, is ~1.4 eV.",

author = "Serena Margadonna and Li, {Wen Zhi} and Kosmas Prassides and Neumann, {D. A.}",

year = "2000",

month = jun,

day = "2",

doi = "10.1016/S0009-2614(00)00454-1",

language = "English",

volume = "322",

pages = "472--476",

journal = "Chemical Physics Letters",

issn = "0009-2614",

publisher = "Elsevier",

number = "6",

}

TY - JOUR

T1 - Rotational dynamics of C 60 in superconducting K 3 Ba 3 C 60

AU - Margadonna, Serena

AU - Li, Wen Zhi

AU - Prassides, Kosmas

AU - Neumann, D. A.

PY - 2000/6/2

Y1 - 2000/6/2

N2 - The orientational dynamics of C60 in superconducting K3Ba3C60 are studied by neutron inelastic scattering. Low-energy excitations are present near ~6 meV between 150 and 320 K and are assigned to small-amplitude librations of the C609- ions. They are harder and broader than those measured in K3C60, reflecting the existence of a stronger and more anisotropic orientational potential. The anisotropy and dispersion effects are also larger than those in isostructural Rb6C60, as a result of positional disorder of the Ba2+ and K+ ions, which reside in distorted tetrahedral interstices. The estimated barrier of the hindrance potential, Ea, is ~1.4 eV.

AB - The orientational dynamics of C60 in superconducting K3Ba3C60 are studied by neutron inelastic scattering. Low-energy excitations are present near ~6 meV between 150 and 320 K and are assigned to small-amplitude librations of the C609- ions. They are harder and broader than those measured in K3C60, reflecting the existence of a stronger and more anisotropic orientational potential. The anisotropy and dispersion effects are also larger than those in isostructural Rb6C60, as a result of positional disorder of the Ba2+ and K+ ions, which reside in distorted tetrahedral interstices. The estimated barrier of the hindrance potential, Ea, is ~1.4 eV.

UR - http://www.scopus.com/inward/record.url?scp=0042187100&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0042187100&partnerID=8YFLogxK

U2 - 10.1016/S0009-2614(00)00454-1

DO - 10.1016/S0009-2614(00)00454-1

M3 - Article

AN - SCOPUS:0042187100

VL - 322

SP - 472

EP - 476

JO - Chemical Physics Letters

JF - Chemical Physics Letters

SN - 0009-2614

IS - 6

ER -