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Near-Edge x‑ray abs...
Near-Edge x‑ray absorption fine structure investigation of the quasi-One-Dimensional organic conductor (TMTSF)2PF6
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- Medjanik, K. (author)
- Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory
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- Chernenkaya, A. (author)
- Johannes-Gutenberg University Mainz
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- Kozina, X. (author)
- Johannes-Gutenberg University Mainz
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- Nepijko, S. A. (author)
- Johannes-Gutenberg University Mainz
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- Öhrwall, G. (author)
- Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory
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- Foury-Leylekian, P. (author)
- University of Paris-Saclay
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- Alemany, P. (author)
- University of Barcelona
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- Schönhense, G. (author)
- Johannes-Gutenberg University Mainz
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- Canadell, E. (author)
- Autonomous University of Barcelona
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- Pouget, J. P. (author)
- University of Paris-Saclay
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(creator_code:org_t)
- 2016-10-25
- 2016
- English 10 s.
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In: Journal of Physical Chemistry A. - : American Chemical Society (ACS). - 1089-5639 .- 1520-5215. ; 120:43, s. 8574-8583
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Abstract
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- We present high-resolution near-edge X-ray absorption fine structure (NEXAFS) measurements at the P L2/3 edges, F K edge, C K edge, and Se M2/3 edges of the quasi-one-dimensional (1D) conductor and superconductor (TMTSF)2PF6. NEXAFS allows probing the donor and acceptor moieties separately; spectra were recorded between room temperature (RT) and 30 K at normal incidence. Spectra taken around RT were also studied as a function of the angle (θ) between the electric field of the X-ray beam and the 1D conducting direction. In contrast with a previous study of the S L2/3-edges spectra in (TMTTF)2AsF6, the Se M2/3 edges of (TMTSF)2PF6 do not exhibit a well-resolved spectrum. Surprisingly, the C K-edge spectra contain three well-defined peaks exhibiting strong and nontrivial θ and temperature dependence. The nature of these peaks as well as those of the F K-edge spectra could be rationalized on the basis of first-principles DFT calculations. Despite the structural similarity, the NEXAFS spectra of (TMTSF)2PF6 and (TMTTF)2AsF6 exhibit important differences. In contrast with the case of (TMTTF)2AsF6, the F K-edge spectra of (TMTSF)2PF6 do not change with temperature despite stronger donor−anion interactions. All these features reveal subtle differences in the electronic structure of the TMTSF and TMTTF families of salts.
Subject headings
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Medjanik, K.
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Chernenkaya, A.
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Kozina, X.
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Nepijko, S. A.
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Öhrwall, G.
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Foury-Leylekian, ...
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show more...
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Alemany, P.
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Schönhense, G.
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Canadell, E.
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Pouget, J. P.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Physical Chemist ...
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Journal of Physi ...
- By the university
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Lund University