Artículo
Acha, C.; Monteverde, M.; Núñez-Regueiro, M.; Kuhn, A.; Alario Franco, M.A. "Electrical resistivity of the Ti4O7 Magneli phase under high pressure" (2003) European Physical Journal B. 34(4):421-428
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Abstract:
We have measured resistivity as a function of temperature and pressure of Ti4O7 twinned crystals using different contact configurations. Pressures over 4 kbar depress the localization of bipolarons and allow the study of the electrical conduction of the bipolaronic phase down to low temperatures. For pressures P > 40 kbar the bipolaron formation transition is suppressed and a nearly pressure independent behavior is obtained for the resistivity. We observed an anisotropic conduction. When current is injected parallel to the principal axis, a metallic conduction with interacting carrier effects is predominant. A superconducting state was not obtained down to 1.2 K, although evidences of the proximity of a quantum critical point were noticed. While when current is injected non-parallel to the crystal's principal axis, we obtained a logarithmic divergence of the resistivity at low temperatures. For this case, our results for the high pressure regime can be interpreted in the framework of interacting carriers (polarons or bipolarons) scattered by Two Level Systems. © EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2003.
Registro:
| Documento: | Artículo |
| Título: | Electrical resistivity of the Ti4O7 Magneli phase under high pressure |
| Autor: | Acha, C.; Monteverde, M.; Núñez-Regueiro, M.; Kuhn, A.; Alario Franco, M.A. |
| Filiación: | Laboratorio de Bajas Temperaturas, Departamento de Física, Ciudad Universitaria, 1428 Buenos Aires, Argentina CRTBT, CNRS, BP166, 38042 Grenoble Cedex 09, France Facultad de Ciencias Experimentales y Técnicas, Universidad San Pablo, 28668 Boadilla del Monte, Spain Facultad de Ciencias Químicas, Universidad Complutense, 28040 Madrid, Spain |
| Palabras clave: | Anisotropy; Crystalline materials; Electric conductivity; Polarons; Pressure effects; Twinning; Anisotropic conduction; Bipolaronic phase; Logarithmic divergence; Magneli phase; Titanium compounds |
| Año: | 2003 |
| Volumen: | 34 |
| Número: | 4 |
| Página de inicio: | 421 |
| Página de fin: | 428 |
| DOI: | http://dx.doi.org/10.1140/epjb/e2003-00240-2 |
| Título revista: | European Physical Journal B |
| Título revista abreviado: | Eur. Phys. J. B |
| ISSN: | 14346028 |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346028_v34_n4_p421_Acha |
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Citas:
---------- APA ----------
Acha, C., Monteverde, M., Núñez-Regueiro, M., Kuhn, A. & Alario Franco, M.A. (2003) . Electrical resistivity of the Ti4O7 Magneli phase under high pressure. European Physical Journal B, 34(4), 421-428.http://dx.doi.org/10.1140/epjb/e2003-00240-2
---------- CHICAGO ----------
Acha, C., Monteverde, M., Núñez-Regueiro, M., Kuhn, A., Alario Franco, M.A. "Electrical resistivity of the Ti4O7 Magneli phase under high pressure" . European Physical Journal B 34, no. 4 (2003) : 421-428.http://dx.doi.org/10.1140/epjb/e2003-00240-2
---------- MLA ----------
Acha, C., Monteverde, M., Núñez-Regueiro, M., Kuhn, A., Alario Franco, M.A. "Electrical resistivity of the Ti4O7 Magneli phase under high pressure" . European Physical Journal B, vol. 34, no. 4, 2003, pp. 421-428.http://dx.doi.org/10.1140/epjb/e2003-00240-2
---------- VANCOUVER ----------
Acha, C., Monteverde, M., Núñez-Regueiro, M., Kuhn, A., Alario Franco, M.A. Electrical resistivity of the Ti4O7 Magneli phase under high pressure. Eur. Phys. J. B. 2003;34(4):421-428.http://dx.doi.org/10.1140/epjb/e2003-00240-2
