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| Colossal positive magnetoresistance in surface-passivated oxygen-deficient strontium titanite | |
| David, A; Tian, YF; Yang, P; Gao, XY; Lin, WN; Shah, AB; Zuo, JM; Prellier, W; Wu, T | |
| 2015 | |
| Source Publication | SCIENTIFIC REPORTS
 |
| Volume | 5Pages:— |
| Subtype | 期刊文献 |
| Abstract | Modulation of resistance by an external magnetic field, i.e. magnetoresistance effect, has been a long-lived theme of research due to both fundamental science and device applications. Here we report colossal positive magnetoresistance (CPMR) (>30,000% at a temperature of 2 K and a magnetic field of 9 T) discovered in degenerate semiconducting strontium titanite (SrTiO3) single crystals capped with ultrathin SrTiO3/LaAlO3 bilayers. The low-pressure high-temperature homoepitaxial growth of several unit cells of SrTiO3 introduces oxygen vacancies and high-mobility carriers in the bulk SrTiO3, and the three-unit-cell LaAlO3 capping layer passivates the surface and improves carrier mobility by suppressing surface-defect-related scattering. The coexistence of multiple types of carriers and inhomogeneous transport lead to the emergence of CPMR. This unit-cell-level surface engineering approach is promising to be generalized to others oxides, and to realize devices with high-mobility carriers and interesting magnetoelectronic properties. |
| Keyword | 2-dimensional Electron-gas Room-temperature Oxide Heterostructures Interface Mobility Silicon Srtio3 |
| Indexed By | SCI |
| Language | 英语 |
| Document Type | 期刊论文 |
| Identifier | http://ir.sinap.ac.cn/handle/331007/24414 |
| Collection | 中科院上海应用物理研究所2011-2020年 |
| Recommended Citation GB/T 7714 | David, A,Tian, YF,Yang, P,et al. Colossal positive magnetoresistance in surface-passivated oxygen-deficient strontium titanite[J]. SCIENTIFIC REPORTS,2015,5:—. |
| APA | David, A.,Tian, YF.,Yang, P.,Gao, XY.,Lin, WN.,...&Wu, T.(2015).Colossal positive magnetoresistance in surface-passivated oxygen-deficient strontium titanite.SCIENTIFIC REPORTS,5,—. |
| MLA | David, A,et al."Colossal positive magnetoresistance in surface-passivated oxygen-deficient strontium titanite".SCIENTIFIC REPORTS 5(2015):—. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Colossal positive ma（1039KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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