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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 |
2010-02-15
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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 (Theses) | |
| Program (Theses) | |
| 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.