Mott Law exp(<i>T</i><sub>0</sub>/<i>T</i>)<sup>1/4</sup> and Scaling Properties of the Oxygen-Deficient Tenorite CuO<sub>0.75</sub>
The novel sub-stoichiometric copper oxide CuO<sub>0.75</sub> was prepared via the slow oxidation of Cu<sub>2</sub>O. This compound retains the original crystallographic structure of tenorite CuO, despite the considerable presence of disordered oxygen vacancies. CuO<sub>...
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2025-06-01
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| author | Danijel Djurek Mladen Prester Djuro Drobac Vilko Mandić Damir Pajić |
| author_facet | Danijel Djurek Mladen Prester Djuro Drobac Vilko Mandić Damir Pajić |
| author_sort | Danijel Djurek |
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| description | The novel sub-stoichiometric copper oxide CuO<sub>0.75</sub> was prepared via the slow oxidation of Cu<sub>2</sub>O. This compound retains the original crystallographic structure of tenorite CuO, despite the considerable presence of disordered oxygen vacancies. CuO<sub>0.75</sub> resembles the mixed valence oxide Cu<sup>2+</sup>/Cu<sup>1+</sup>, while the unit cell contains one oxygen vacancy. Performance-wise, the electric resistivity and magnetic susceptibility data follow the Anderson–Mott localization theories. The exponential localization decay length was found to be α<sup>−1</sup> = 2.1 nm, in line with modern scaling research. Via cooling, magnetic double-exchange interaction, mediated by oxygen, results in Zener conductivity at <i>T</i>~122 K, which is followed by antiferromagnetic transition at <i>T</i>~51 K. The obtained results indicate that the CuO<sub>0.75</sub> compound can be perceived as a showcase material for the demonstration of a new class of high-performance magnetic materials. |
| format | Article |
| id | doaj-art-d329f86ae7ed4bb5bd538b3cc6cb4254 |
| institution | Kabale University |
| issn | 2410-3896 |
| language | English |
| publishDate | 2025-06-01 |
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| series | Condensed Matter |
| spelling | doaj-art-d329f86ae7ed4bb5bd538b3cc6cb42542025-08-20T03:24:32ZengMDPI AGCondensed Matter2410-38962025-06-011023310.3390/condmat10020033Mott Law exp(<i>T</i><sub>0</sub>/<i>T</i>)<sup>1/4</sup> and Scaling Properties of the Oxygen-Deficient Tenorite CuO<sub>0.75</sub>Danijel Djurek0Mladen Prester1Djuro Drobac2Vilko Mandić3Damir Pajić4Alessandro Volta Applied Ceramics (AVAC), Augusta Šenoe 14, 49247 Zlatar Bistrica, CroatiaInstitute of Physics, Bijenička Cesta 46, 10000 Zagreb, CroatiaInstitute of Physics, Bijenička Cesta 46, 10000 Zagreb, CroatiaFaculty of Chemical Engineering and Technology, University of Zagreb, TrgMarkaMarulića 19, 10000 Zagreb, CroatiaDepartment of Physics, Faculty of Science, University of Zagreb, Bijenička Cesta 32, 10000 Zagreb, CroatiaThe novel sub-stoichiometric copper oxide CuO<sub>0.75</sub> was prepared via the slow oxidation of Cu<sub>2</sub>O. This compound retains the original crystallographic structure of tenorite CuO, despite the considerable presence of disordered oxygen vacancies. CuO<sub>0.75</sub> resembles the mixed valence oxide Cu<sup>2+</sup>/Cu<sup>1+</sup>, while the unit cell contains one oxygen vacancy. Performance-wise, the electric resistivity and magnetic susceptibility data follow the Anderson–Mott localization theories. The exponential localization decay length was found to be α<sup>−1</sup> = 2.1 nm, in line with modern scaling research. Via cooling, magnetic double-exchange interaction, mediated by oxygen, results in Zener conductivity at <i>T</i>~122 K, which is followed by antiferromagnetic transition at <i>T</i>~51 K. The obtained results indicate that the CuO<sub>0.75</sub> compound can be perceived as a showcase material for the demonstration of a new class of high-performance magnetic materials.https://www.mdpi.com/2410-3896/10/2/33Anderson–Mott localizationscalingoxygen-deficient tenoriteMott (<i>T</i>/<i>T</i><sub>0</sub>)<sup>−1/4</sup> lawmetal–insulator transition |
| spellingShingle | Danijel Djurek Mladen Prester Djuro Drobac Vilko Mandić Damir Pajić Mott Law exp(<i>T</i><sub>0</sub>/<i>T</i>)<sup>1/4</sup> and Scaling Properties of the Oxygen-Deficient Tenorite CuO<sub>0.75</sub> Condensed Matter Anderson–Mott localization scaling oxygen-deficient tenorite Mott (<i>T</i>/<i>T</i><sub>0</sub>)<sup>−1/4</sup> law metal–insulator transition |
| title | Mott Law exp(<i>T</i><sub>0</sub>/<i>T</i>)<sup>1/4</sup> and Scaling Properties of the Oxygen-Deficient Tenorite CuO<sub>0.75</sub> |
| title_full | Mott Law exp(<i>T</i><sub>0</sub>/<i>T</i>)<sup>1/4</sup> and Scaling Properties of the Oxygen-Deficient Tenorite CuO<sub>0.75</sub> |
| title_fullStr | Mott Law exp(<i>T</i><sub>0</sub>/<i>T</i>)<sup>1/4</sup> and Scaling Properties of the Oxygen-Deficient Tenorite CuO<sub>0.75</sub> |
| title_full_unstemmed | Mott Law exp(<i>T</i><sub>0</sub>/<i>T</i>)<sup>1/4</sup> and Scaling Properties of the Oxygen-Deficient Tenorite CuO<sub>0.75</sub> |
| title_short | Mott Law exp(<i>T</i><sub>0</sub>/<i>T</i>)<sup>1/4</sup> and Scaling Properties of the Oxygen-Deficient Tenorite CuO<sub>0.75</sub> |
| title_sort | mott law exp i t i sub 0 sub i t i sup 1 4 sup and scaling properties of the oxygen deficient tenorite cuo sub 0 75 sub |
| topic | Anderson–Mott localization scaling oxygen-deficient tenorite Mott (<i>T</i>/<i>T</i><sub>0</sub>)<sup>−1/4</sup> law metal–insulator transition |
| url | https://www.mdpi.com/2410-3896/10/2/33 |
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