Large positive magnetoresistance in photocarrier doping potassium tantalites in the extreme quantum limit
Abstract
We report on a high-field magnetotransport study of KTaO3 single crystals. This material is a promising candidate to study in the extreme quantum limit (EQL). By photocarrier doping with 360 nm light, we have observed a significant positive, non-saturating, and linear magnetoresistance at low temperatures accompanied by a vanishing Hall coefficient. When cooled down to 10 K and subjected to a magnetic field of 12 T, the value of magnetoresistance of KTaO3 (100) is increased by as much as 433%. Such behavior can be attributed to all electrons occupying only the lowest Landau level in the EQL. In this state, a quantum magnetoresistance is produced. This result provides novel insights into the next generation of magnetic devices based on complex materials and adds a new family of materials with positive magnetoresistance.
- Publication:
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arXiv e-prints
- Pub Date:
- October 2021
- DOI:
- 10.48550/arXiv.2110.05791
- arXiv:
- arXiv:2110.05791
- Bibcode:
- 2021arXiv211005791Y
- Keywords:
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- Condensed Matter - Materials Science;
- Condensed Matter - Other Condensed Matter