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http://hdl.handle.net/10773/19900
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DC Field | Value | Language |
---|---|---|
dc.contributor.author | Jin, Zuanming | pt |
dc.contributor.author | Tkach, Alexander | pt |
dc.contributor.author | Casper, Frederick | pt |
dc.contributor.author | Spetter, Victor | pt |
dc.contributor.author | Grimm, Hubert | pt |
dc.contributor.author | Thomas, Andy | pt |
dc.contributor.author | Kampfrath, Tobias | pt |
dc.contributor.author | Bonn, Mischa | pt |
dc.contributor.author | Klaeui, Mathias | pt |
dc.contributor.author | Turchinovich, Dmitry | pt |
dc.date.accessioned | 2017-12-07T19:28:41Z | - |
dc.date.issued | 2015 | pt |
dc.identifier.issn | 1745-2473 | pt |
dc.identifier.uri | http://hdl.handle.net/10773/19900 | - |
dc.description.abstract | Spin-dependent conduction in metals underlies all modern magnetic memory technologies, such as giant magnetoresistance (GMR). The charge current in ferromagnetic transition metals is carried by two non-mixing populations of sp-band Fermi-level electrons: one of majority-spin and one of minority-spin. These electrons experience spin-dependent momentum scattering with localized electrons, which originate from the spin-split d-band. The direct observation of magnetotransport under such fundamental conditions, however, requires magnetotransport measurements on the same timescale as the electron momentum scattering, which takes place in the sub-100 fs regime. Using terahertz electromagnetic probes, we directly observe the magnetotransport in a metallic system under the fundamental conditions, and determine the spin-dependent densities and momentum scattering times of conduction electrons. We show that traditional measurements significantly underestimate the spin asymmetry in electron scattering, a key parameter responsible for effects such as GMR. Furthermore, we demonstrate the possibility of magnetic modulation of terahertz waves, along with heat- and contact-free GMR readout using ultrafast terahertz signals. | pt |
dc.language.iso | eng | pt |
dc.publisher | NATURE PUBLISHING GROUP | pt |
dc.relation | info:eu-repo/grantAgreement/EC/FP7/334324/EU | pt |
dc.relation | info:eu-repo/grantAgreement/EC/FP7/608031/EU | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/5876/147332/PT | pt |
dc.rights | restrictedAccess | por |
dc.subject | LAYERED MAGNETIC-STRUCTURES | pt |
dc.subject | GIANT MAGNETORESISTANCE | pt |
dc.subject | FERROMAGNETIC NICKEL | pt |
dc.subject | SPIN DYNAMICS | pt |
dc.subject | ENERGY-BANDS | pt |
dc.subject | TRANSPORT | pt |
dc.subject | DEMAGNETIZATION | pt |
dc.subject | SPECTROSCOPY | pt |
dc.subject | TEMPERATURE | pt |
dc.subject | RELAXATION | pt |
dc.title | Accessing the fundamentals of magnetotransport in metals with terahertz probes | pt |
dc.type | article | pt |
dc.peerreviewed | yes | pt |
ua.distribution | international | pt |
degois.publication.firstPage | 761 | pt |
degois.publication.issue | 9 | pt |
degois.publication.lastPage | 766 | pt |
degois.publication.title | NATURE PHYSICS | pt |
degois.publication.volume | 11 | pt |
dc.date.embargo | 10000-01-01 | - |
dc.relation.publisherversion | 10.1038/NPHYS3384 | pt |
dc.identifier.doi | 10.1038/NPHYS3384 | pt |
Appears in Collections: | CICECO - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Accessing the fundamentals of magnetotransport in metals with terahertz probes_10.1038NPHYS3384.pdf | 527.82 kB | Adobe PDF |
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