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Title: Shubnikov-de Haas experiments on potassium-hydrogen-graphite intercalation compounds (KH/sub x/-GIC's),

Abstract

Potassium-hydrogen-graphite ternary compounds (KH/sub x/-GIC, 0 < x < 1) are donor-type compounds containing an ionic intercalant K H . Basically the effect of hydrogen addition is the uptake of electrons from the potassium so that fewer electrons are available for conduction in the graphite bands. To obtain Fermi-surface information directly, Shubnikov--de Haas (SdH) measurements were carried out on stage-1, -2, and -4 KH/sub x/-GIC's. The results are compared with the electronic properties of K-GIC's and KHg/sub x/-GIC's. The observed oscillations are qualitatively modeled using the three-dimensional dilute-limit model. These Fermi-surface results are related to other experiments on KH/sub x/-GIC's, such as magnetic susceptibility, electronic specific heat, Raman scattering, and superconductivity. For example, it is found that because of the strong electron affinity of hydrogen, the charge transfer to hydrogen and graphite in stage-2 KH/sub x/-GIC's completely depletes the electrons in the potassium conduction band, consistent with the experimental specific-heat results. The basic conclusion that the uptake of hydrogen results in a lower electron concentration in the graphite bands is supported by all experiments.

Authors:
; ; ;
Publication Date:
Research Org.:
Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
OSTI Identifier:
6302807
DOE Contract Number:  
AC02-83ER45041
Resource Type:
Journal Article
Journal Name:
Phys. Rev. B: Condens. Matter; (United States)
Additional Journal Information:
Journal Volume: 33:2
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; GRAPHITE; CLATHRATES; ELECTRIC CONDUCTIVITY; SHUBNIKOV-DE HAAS EFFECT; POTASSIUM HYDRIDES; ELECTRON CAPTURE; FERMI LEVEL; HYDROGEN; ALKALI METAL COMPOUNDS; CAPTURE; CARBON; ELECTRICAL PROPERTIES; ELEMENTAL MINERALS; ELEMENTS; ENERGY LEVELS; HYDRIDES; HYDROGEN COMPOUNDS; MINERALS; NONMETALS; PHYSICAL PROPERTIES; POTASSIUM COMPOUNDS; 360603* - Materials- Properties

Citation Formats

Enoki, T, Yeh, N, Chen, S, and Dresselhaus, M S. Shubnikov-de Haas experiments on potassium-hydrogen-graphite intercalation compounds (KH/sub x/-GIC's),. United States: N. p., 1986. Web. doi:10.1103/PhysRevB.33.1292.
Enoki, T, Yeh, N, Chen, S, & Dresselhaus, M S. Shubnikov-de Haas experiments on potassium-hydrogen-graphite intercalation compounds (KH/sub x/-GIC's),. United States. https://doi.org/10.1103/PhysRevB.33.1292
Enoki, T, Yeh, N, Chen, S, and Dresselhaus, M S. Wed . "Shubnikov-de Haas experiments on potassium-hydrogen-graphite intercalation compounds (KH/sub x/-GIC's),". United States. https://doi.org/10.1103/PhysRevB.33.1292.
@article{osti_6302807,
title = {Shubnikov-de Haas experiments on potassium-hydrogen-graphite intercalation compounds (KH/sub x/-GIC's),},
author = {Enoki, T and Yeh, N and Chen, S and Dresselhaus, M S},
abstractNote = {Potassium-hydrogen-graphite ternary compounds (KH/sub x/-GIC, 0 < x < 1) are donor-type compounds containing an ionic intercalant K H . Basically the effect of hydrogen addition is the uptake of electrons from the potassium so that fewer electrons are available for conduction in the graphite bands. To obtain Fermi-surface information directly, Shubnikov--de Haas (SdH) measurements were carried out on stage-1, -2, and -4 KH/sub x/-GIC's. The results are compared with the electronic properties of K-GIC's and KHg/sub x/-GIC's. The observed oscillations are qualitatively modeled using the three-dimensional dilute-limit model. These Fermi-surface results are related to other experiments on KH/sub x/-GIC's, such as magnetic susceptibility, electronic specific heat, Raman scattering, and superconductivity. For example, it is found that because of the strong electron affinity of hydrogen, the charge transfer to hydrogen and graphite in stage-2 KH/sub x/-GIC's completely depletes the electrons in the potassium conduction band, consistent with the experimental specific-heat results. The basic conclusion that the uptake of hydrogen results in a lower electron concentration in the graphite bands is supported by all experiments.},
doi = {10.1103/PhysRevB.33.1292},
url = {https://www.osti.gov/biblio/6302807}, journal = {Phys. Rev. B: Condens. Matter; (United States)},
number = ,
volume = 33:2,
place = {United States},
year = {1986},
month = {1}
}