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Deuteron magnetic resonance of TTF(d₀)-TCNQ(d₄) Kubik, Philip Roman
Abstract
The deuteron magnetic resonance of powdered TTF(d₀)-TCNQ(d₄) has been observed at 4.2 K and 1.3 K. The lineshape is characterized by a quadrupole splitting with a coupling constant e²qQ/h=180.0±.7 kHz and an asymmetry parameter η=.080±.002. The charge density waves (CDW) that are proposed to exist in TTF-TCNQ below 54 K will, modulate e²qQ/h if they occur on the TCNQ chains. This will be manifested by a characteristic broadening of the spectrum. Although the broadening is a factor of 2.4 greater than the expected dipolar broadening, it does not seem that the extra broadening can be ascribed to the presence of a CDW. We can only estimate an upper limit of ~5% for the CDW amplitude based of the observed broadening and the differences in the quadrupole coupling constants of TTF(d₀)-TCNQ(d₄) and TCNQ(d₄).
Item Metadata
Title |
Deuteron magnetic resonance of TTF(d₀)-TCNQ(d₄)
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1977
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Description |
The deuteron magnetic resonance of powdered TTF(d₀)-TCNQ(d₄) has been observed at 4.2 K and 1.3 K. The lineshape is characterized by a quadrupole splitting with a coupling constant e²qQ/h=180.0±.7 kHz and an asymmetry parameter η=.080±.002. The charge density waves (CDW) that are proposed to exist in TTF-TCNQ below 54 K will, modulate e²qQ/h if they occur on the TCNQ chains. This will be manifested by a characteristic broadening of the spectrum. Although the broadening is a factor of 2.4 greater than the expected dipolar broadening, it does not seem that the extra broadening can be ascribed to the presence of a CDW. We can only estimate an upper limit of ~5% for the CDW amplitude based of the observed broadening and the differences in the quadrupole coupling constants of TTF(d₀)-TCNQ(d₄) and TCNQ(d₄).
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Genre | |
Type | |
Language |
eng
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Date Available |
2010-02-16
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0093995
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.