ESR study of Li-doped polyacenic semiconductor (PAS) materials

Kazuyoshi Tanaka; Hiroki Ago; Yukihito Matsuura; Takako Kuga; Tokio Yamabe; Shizukuni Yata; Yukinori Hato; Nobuo Ando

doi:10.1016/s0379-6779(98)80114-8

ESR study of Li-doped polyacenic semiconductor (PAS) materials

Kazuyoshi Tanaka, Hiroki Ago, Yukihito Matsuura, Takako Kuga, Tokio Yamabe, Shizukuni Yata, Yukinori Hato, Nobuo Ando

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

The electronic states of Li-doped polyacenic semiconductor (PAS) materials have been examined based on electron spin resonance (ESR) observations. It has been found that Li doping causes not only metallic transition but increase in the peak-to-peak linewidth (ΔH_pp) of the ESR lineshape, probably due to enhancement of the spin-orbit interactions occurring in conduction electrons on the Li atoms. Increase in ΔH_pp has been observed up to the C₂Li stage without any sign of liberation of Li clusters. The temperature dependence of ΔH_ppsuggests a certain hopping process for conduction electrons to migrate onto Li atoms. The PAS samples doped beyond the C₂Li stage have shown a two-phase ESR spectrum, which consists of a broader component coming from the original carbon π-radicals and a narrow spike from the liberated Li clusters.

Original language	English
Pages (from-to)	133-139
Number of pages	7
Journal	Synthetic Metals
Volume	89
Issue number	2
DOIs	https://doi.org/10.1016/s0379-6779(98)80114-8
Publication status	Published - Aug 1997
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/s0379-6779(98)80114-8

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@article{1436dc402f5540d3ad6f15daa0df2c93,

title = "ESR study of Li-doped polyacenic semiconductor (PAS) materials",

abstract = "The electronic states of Li-doped polyacenic semiconductor (PAS) materials have been examined based on electron spin resonance (ESR) observations. It has been found that Li doping causes not only metallic transition but increase in the peak-to-peak linewidth (ΔHpp) of the ESR lineshape, probably due to enhancement of the spin-orbit interactions occurring in conduction electrons on the Li atoms. Increase in ΔHpp has been observed up to the C2Li stage without any sign of liberation of Li clusters. The temperature dependence of ΔHppsuggests a certain hopping process for conduction electrons to migrate onto Li atoms. The PAS samples doped beyond the C2Li stage have shown a two-phase ESR spectrum, which consists of a broader component coming from the original carbon π-radicals and a narrow spike from the liberated Li clusters.",

author = "Kazuyoshi Tanaka and Hiroki Ago and Yukihito Matsuura and Takako Kuga and Tokio Yamabe and Shizukuni Yata and Yukinori Hato and Nobuo Ando",

note = "Funding Information: Thanks are due to the Instrument Center, the Institute for Molecular Science (Okazaki, Japan), for kind assistance in performing the ESR measurements under cryogenic temperature. This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science and Culture of Japan and by the fund of Research for the Future Program of the Japan Society for the Promotion of Science (JSPS-RFTF 96POO206).",

year = "1997",

month = aug,

doi = "10.1016/s0379-6779(98)80114-8",

language = "English",

volume = "89",

pages = "133--139",

journal = "Synthetic Metals",

issn = "0379-6779",

publisher = "Elsevier BV",

number = "2",

}

TY - JOUR

T1 - ESR study of Li-doped polyacenic semiconductor (PAS) materials

AU - Tanaka, Kazuyoshi

AU - Ago, Hiroki

AU - Matsuura, Yukihito

AU - Kuga, Takako

AU - Yamabe, Tokio

AU - Yata, Shizukuni

AU - Hato, Yukinori

AU - Ando, Nobuo

N1 - Funding Information: Thanks are due to the Instrument Center, the Institute for Molecular Science (Okazaki, Japan), for kind assistance in performing the ESR measurements under cryogenic temperature. This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science and Culture of Japan and by the fund of Research for the Future Program of the Japan Society for the Promotion of Science (JSPS-RFTF 96POO206).

PY - 1997/8

Y1 - 1997/8

N2 - The electronic states of Li-doped polyacenic semiconductor (PAS) materials have been examined based on electron spin resonance (ESR) observations. It has been found that Li doping causes not only metallic transition but increase in the peak-to-peak linewidth (ΔHpp) of the ESR lineshape, probably due to enhancement of the spin-orbit interactions occurring in conduction electrons on the Li atoms. Increase in ΔHpp has been observed up to the C2Li stage without any sign of liberation of Li clusters. The temperature dependence of ΔHppsuggests a certain hopping process for conduction electrons to migrate onto Li atoms. The PAS samples doped beyond the C2Li stage have shown a two-phase ESR spectrum, which consists of a broader component coming from the original carbon π-radicals and a narrow spike from the liberated Li clusters.

AB - The electronic states of Li-doped polyacenic semiconductor (PAS) materials have been examined based on electron spin resonance (ESR) observations. It has been found that Li doping causes not only metallic transition but increase in the peak-to-peak linewidth (ΔHpp) of the ESR lineshape, probably due to enhancement of the spin-orbit interactions occurring in conduction electrons on the Li atoms. Increase in ΔHpp has been observed up to the C2Li stage without any sign of liberation of Li clusters. The temperature dependence of ΔHppsuggests a certain hopping process for conduction electrons to migrate onto Li atoms. The PAS samples doped beyond the C2Li stage have shown a two-phase ESR spectrum, which consists of a broader component coming from the original carbon π-radicals and a narrow spike from the liberated Li clusters.

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U2 - 10.1016/s0379-6779(98)80114-8

DO - 10.1016/s0379-6779(98)80114-8

M3 - Article

AN - SCOPUS:0031210518

SN - 0379-6779

VL - 89

SP - 133

EP - 139

JO - Synthetic Metals

JF - Synthetic Metals

IS - 2

ER -

ESR study of Li-doped polyacenic semiconductor (PAS) materials

Abstract

All Science Journal Classification (ASJC) codes

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