Ordered low-temperature structure in K4C60 detected by infrared spectroscopy
Ordered low-temperature structure in K4C60 detected by infrared spectroscopy
Infrared spectra of a K4C60 single-phase thin film have been measured between room temperature and 20 K. At low temperatures, the two high-frequency T1u modes appear as triplets, indicating a static D2h crystal-field stabilized Jahn-Teller distortion of the (C60)4- anions. The T1u(4) mode changes into the known doublet above 250 K, a pattern which could have three origins: a dynamic Jahn-Teller effect, static disorder between "staggered" anions, or a phase transition from an orientationally-ordered phase to one where molecular motion is significant.
A. F. Hebard、D. B. Tanner、J. E. Fischer、G. Klupp、K. Kamaras、N. M. Nemes
University of Florida, Gainesville, FL, USAUniversity of Florida, Gainesville, FL, USAUniversity of Pennsylvania, Philadelphia, PA, USAResearch Institute for Solid State Physics and Optics, Budapest, HungaryResearch Institute for Solid State Physics and Optics, Budapest, HungaryUniversity of Pennsylvania, Philadelphia, PA, USA
物理学晶体学
A. F. Hebard,D. B. Tanner,J. E. Fischer,G. Klupp,K. Kamaras,N. M. Nemes.Ordered low-temperature structure in K4C60 detected by infrared spectroscopy[EB/OL].(2001-10-16)[2025-08-10].https://arxiv.org/abs/cond-mat/0110320.点此复制
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