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| Hauptseite > Publikationsdatenbank > The importance of singly charged oxygen vacancies for electrical conduction in monoclinic HfO 2 > print |
| Hauptseite > Publikationsdatenbank > The importance of singly charged oxygen vacancies for electrical conduction in monoclinic HfO 2 > print |
| 001 | 889300 | ||
| 005 | 20211113141656.0 | ||
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| 100 | 1 | _ | |a Mueller, Michael P. |0 0000-0003-0399-1869 |b 0 |e Corresponding author |
| 245 | _ | _ | |a The importance of singly charged oxygen vacancies for electrical conduction in monoclinic HfO 2 |
| 260 | _ | _ | |a Melville, NY |c 2021 |b American Inst. of Physics |
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| 520 | _ | _ | |a The point-defect structure of monoclinic HfO2 (m-HfO2) was studied by means of equilibrium electrical conductance measurements as a function of temperature 1050≤T/K≤1200 and oxygen partial pressure −20≤log(pO2/bar)≤−2. The total conductivity σ displayed similar behavior at each temperature examined. In oxidizing conditions (pO2≥10−7bar), the total conductivity increased with increasing oxygen partial pressure and was assigned to hole conduction. Around 10−10 bar, a region of almost constant conductivity was found; this is ascribed to ionic conduction by means of doubly charged oxygen vacancies. In reducing conditions (pO2≤10−16bar), the total conductivity surprisingly decreased with decreasing oxygen partial pressure. Defect-chemical modeling indicates that this behavior is consistent with the conversion of mobile doubly charged oxygen vacancies into less mobile singly charged vacancies by electron trapping. Point-defect concentrations at the oxygen partial pressures relevant to resistive switching devices are predicted and discussed. |
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| 700 | 1 | _ | |a De Souza, Roger A. |0 0000-0001-7721-4128 |b 3 |
| 773 | _ | _ | |a 10.1063/5.0036024 |g Vol. 129, no. 2, p. 025104 - |0 PERI:(DE-600)1476463-5 |n 2 |p 025104 - |t Journal of applied physics |v 129 |y 2021 |x 1089-7550 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/889300/files/5.0036024.pdf |y Published on 2021-01-08. Available in OpenAccess from 2022-01-08. |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/889300/files/hfo2_defects_manuscript_rev.pdf |y Published on 2021-01-08. Available in OpenAccess from 2022-01-08. |
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