DUFFY, DM;
STONEHAM, AM;
(1983)
CONDUCTIVITY AND NEGATIVE-U FOR IONIC GRAIN-BOUNDARIES.
J PHYS C SOLID STATE
, 16
(21)
4087 - 4092.
10.1088/0022-3719/16/21/009.
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Abstract
The authors show that charge-transfer excitations (like 2M2+ to M++M3+) can be lowered greatly in energy near grain boundaries, where sites are no longer equivalent. In special cases the excitations may be exothermic ('negative-U' behaviour); likely cases include (320) and (122) grain boundaries in FeO. Consequences include effects on conductivity, segregation of impurities with different valence, and on other charge-state-dependent properties.
| Type: | Article |
|---|---|
| Title: | CONDUCTIVITY AND NEGATIVE-U FOR IONIC GRAIN-BOUNDARIES |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/0022-3719/16/21/009 |
| Publisher version: | http://dx.doi.org/10.1088/0022-3719/16/21/009 |
| Language: | English |
| Additional information: | Text made available to UCL Discovery by kind permission of IOP Publishing, 2012 |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/66115 |
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