Effect of modified periodic waveforms on current-induced spin polarization measurements
Applying a voltage to a semiconductor sample generates a current-induced electron spin polarization (CISP). Using an ultrafast mode-locked laser and lock-in detection scheme, we measure CISP on an indium gallium arsenide epilayer via Faraday rotation and extract the spin generation rate. While the m...
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| Veröffentlicht in: | AIP advances 2018-06, Vol.8 (6), p.065113-065113-5 |
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| container_end_page | 065113-5 |
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| container_issue | 6 |
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| container_title | AIP advances |
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| creator | Iafrate, Joseph R. Huang, Simon Del Gaudio, Davide Goldman, Rachel S. Sih, Vanessa |
| description | Applying a voltage to a semiconductor sample generates a current-induced electron spin polarization (CISP). Using an ultrafast mode-locked laser and lock-in detection scheme, we measure CISP on an indium gallium arsenide epilayer via Faraday rotation and extract the spin generation rate. While the measured spin polarization initially increases linearly with electric field as observed in previous work, larger applied voltages lead to a decreasing spin generation rate. We show that we can recover the linear dependence of spin generation rate with electric field even at larger applied voltages by modifying the applied voltage waveform to reduce heating and multiplying by an appropriate correction factor. Future CISP studies can utilize this technique to investigate CISP under larger applied electric fields. |
| doi_str_mv | 10.1063/1.5026760 |
| format | Article |
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Using an ultrafast mode-locked laser and lock-in detection scheme, we measure CISP on an indium gallium arsenide epilayer via Faraday rotation and extract the spin generation rate. While the measured spin polarization initially increases linearly with electric field as observed in previous work, larger applied voltages lead to a decreasing spin generation rate. We show that we can recover the linear dependence of spin generation rate with electric field even at larger applied voltages by modifying the applied voltage waveform to reduce heating and multiplying by an appropriate correction factor. 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| source | DOAJ Directory of Open Access Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Alma/SFX Local Collection; Free Full-Text Journals in Chemistry |
| subjects | Arsenides Dependence Electric fields Electric potential Electron spin Electrons Faraday effect Gallium arsenide PHYSICS OF ELEMENTARY PARTICLES AND FIELDS Polarization Polarization (spin alignment) Waveforms |
| title | Effect of modified periodic waveforms on current-induced spin polarization measurements |
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