Terahertz Spin-Conductance Spectroscopy: Probing Coherent and Incoherent Ultrafast Spin Tunneling
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10486162" target="_blank" >RIV/00216208:11320/24:10486162 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=ldNkiLuvXQ" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=ldNkiLuvXQ</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.nanolett.4c00498" target="_blank" >10.1021/acs.nanolett.4c00498</a>
Alternative languages
Result language
angličtina
Original language name
Terahertz Spin-Conductance Spectroscopy: Probing Coherent and Incoherent Ultrafast Spin Tunneling
Original language description
Thin-film stacks F/H consisting of a ferromagnetic-metal layer F and a heavymetallayer H are spintronic model systems. Here, we present a method to measure theultrabroadband spin conductance across a layer X between F and H at terahertz frequencies,which are the natural frequencies of spin-transport dynamics. We apply our approach to MgOtunneling barriers with thickness d = 0-6 Å. In the time domain, the spin conductance Gs hastwo components. An instantaneous feature arises from processes like coherent spin tunneling.Remarkably, a longer-lived component is a hallmark of incoherent resonant spin tunnelingmediated by MgO defect states, because its relaxation time grows monotonically with d to asmuch as 270 fs at d = 6.0 Å. Our results are in full agreement with an analytical model. Theyindicate that terahertz spin-conductance spectroscopy will yield new and relevant insights intoultrafast spin transport in a wide range of spintronic nanostructures.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10306 - Optics (including laser optics and quantum optics)
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Nano Letters
ISSN
1530-6984
e-ISSN
1530-6992
Volume of the periodical
24
Issue of the periodical within the volume
26
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
7852-7860
UT code for WoS article
001252871400001
EID of the result in the Scopus database
2-s2.0-85196791552