Spin injection and detection in lanthanum- and niobium-doped SrTiO3 using the Hanle technique
dc.contributor.author | Han, Wei | |
dc.contributor.author | Jiang, Xin | |
dc.contributor.author | Kajdos, Adam | |
dc.contributor.author | Yang, See-Hun | |
dc.contributor.author | Stemmer, Susanne | |
dc.contributor.author | Parkin, Stuart S. P. | |
dc.date.accessioned | 2016-02-23T13:52:28Z | |
dc.date.available | 2016-02-23T13:52:28Z | |
dc.date.issued | 2013-07-08 | |
dc.identifier.citation | Han W, Jiang X, Kajdos A, Yang S-H, Stemmer S, et al. (2013) Spin injection and detection in lanthanum- and niobium-doped SrTiO3 using the Hanle technique. Nat Comms 4. Available: http://dx.doi.org/10.1038/ncomms3134. | |
dc.identifier.issn | 2041-1723 | |
dc.identifier.pmid | 23831939 | |
dc.identifier.doi | 10.1038/ncomms3134 | |
dc.identifier.uri | http://hdl.handle.net/10754/597013 | |
dc.description.abstract | There has been much interest in the injection and detection of spin-polarized carriers in semiconductors for the purposes of developing novel spintronic devices. Here we report the electrical injection and detection of spin-polarized carriers into Nb-doped strontium titanate single crystals and La-doped strontium titanate epitaxial thin films using MgO tunnel barriers and the three-terminal Hanle technique. Spin lifetimes of up to ∼100 ps are measured at room temperature and vary little as the temperature is decreased to low temperatures. However, the mobility of the strontium titanate has a strong temperature dependence. This behaviour and the carrier doping dependence of the spin lifetime suggest that the spin lifetime is limited by spin-dependent scattering at the MgO/strontium titanate interfaces, perhaps related to the formation of doping induced Ti 3+. Our results reveal a severe limitation of the three-terminal Hanle technique for measuring spin lifetimes within the interior of the subject material. © 2013 Macmillan Publishers Limited. All rights reserved. | |
dc.description.sponsorship | We acknowledge partial support for this work from the MURI program of the Army Research Office (Grant no. W911-NF-09-1-0398) and the King Abdullah University of Science and Technology (KAUST), and thank Professor Aurelien Manchon, KAUST, for useful discussions. | |
dc.publisher | Springer Nature | |
dc.rights | Open access articles are published under a CC BY license (Creative Commons Attribution 4.0 International License). | |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
dc.title | Spin injection and detection in lanthanum- and niobium-doped SrTiO3 using the Hanle technique | |
dc.type | Article | |
dc.identifier.journal | Nature Communications | |
dc.contributor.institution | IBM Almaden Research Center, San Jose, United States | |
dc.contributor.institution | University of California, Santa Barbara, Santa Barbara, United States | |
refterms.dateFOA | 2018-06-13T15:29:31Z | |
dc.date.published-online | 2013-07-08 | |
dc.date.published-print | 2013-12 |