Poly-MTO, {(CH_3)_{0.92} Re O_3}_\infty, a Conducting Two-Dimensional Organometallic Oxide

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dc.creatorMiller, R.
dc.creatorScheidt, E. -W.
dc.creatorEickerling, G.
dc.creatorHelbig, C.
dc.creatorMayr, F.
dc.creatorHerrmann, R.
dc.creatorScherer, W.
dc.creatorvon Nidda, H. -A. Krug
dc.creatorEyert, V.
dc.creatorSchwab, P.
dc.date2005-12-21
dc.date.accessioned2026-07-07T06:53:36Z
dc.date.available2026-07-07T06:53:36Z
dc.descriptionPolymeric methyltrioxorhenium, {(CH_{3})_{0.92}ReO_{3}}_{\infty} (poly-MTO), is the first member of a new class of organometallic hybrids which adopts the structural pattern and physical properties of classical perovskites in two dimensions (2D). We demonstrate how the electronic structure of poly-MTO can be tailored by intercalation of organic donor molecules, such as tetrathiafulvalene (TTF) or bis-(ethylendithio)-tetrathiafulvalene (BEDT-TTF), and by the inorganic acceptor SbF$_3$. Integration of donor molecules leads to a more insulating behavior of poly-MTO, whereas SbF$_3$ insertion does not cause any significant change in the resistivity. The resistivity data of pure poly-MTO is remarkably well described by a two-dimensional electron system. Below 38 K an unusual resistivity behavior, similar to that found in doped cuprates, is observed: The resistivity initially increases approximately as $ρ\sim$ ln$(1/T$) before it changes into a $\sqrt{T}$ dependence below 2 K. As an explanation we suggest a crossover from purely two-dimensional charge-carrier diffusion within the \{ReO$_2$\}$_{\infty}$ planes at high temperatures to three-dimensional diffusion at low temperatures in a disorder-enhanced electron-electron interaction scenario (Altshuler-Aronov correction). Furthermore, a linear positive magnetoresistance was found in the insulating regime, which is caused by spatial localization of itinerant electrons at some of the Re atoms, which formally adopt a $5d^1$ electronic configuration. X-ray diffraction, IR- and ESR-studies, temperature dependent magnetization and specific heat measurements in various magnetic fields suggest that the electronic structure of poly-MTO can safely be approximated by a purely 2D conductor.
dc.description15 pages, 16 figures, 2 tables
dc.identifierhttps://arxiv.org/abs/cond-mat/0512544
dc.identifierhttp://arxiv.org/abs/cond-mat/0512544
dc.identifierPhys. Rev. B 73, 165113 (2006)
dc.identifierdoi:10.1103/PhysRevB.73.165113
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/105645
dc.subjectMaterials Science
dc.subjectStrongly Correlated Electrons
dc.titlePoly-MTO, {(CH_3)_{0.92} Re O_3}_\infty, a Conducting Two-Dimensional Organometallic Oxide
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