Normalization procedure for obtaining the local density of states from high-bias scanning tunneling spectroscopy
| العنوان: | Normalization procedure for obtaining the local density of states from high-bias scanning tunneling spectroscopy |
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| المؤلفون: | Rasa Rejali, Laëtitia Farinacci, Sander Otte |
| المصدر: | Physical Review B, 107(3) |
| بيانات النشر: | American Physical Society (APS), 2023. |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), FOS: Physical sciences |
| الوصف: | Differential conductance spectroscopy performed in the high bias regime - in which the applied voltage exceeds the sample work function - is a suboptimal measure of the local density of states due to the effects of the changing tunnel barrier. Additionally, the large applied voltage oftentimes makes constant-height measurement experimentally impractical, lending constant-current spectroscopy an advantageous edge; but the differential conductance in that case is even further removed from the local density of states due to the changing tip height. Here, we present a normalization scheme for extracting the local density of states from high bias scanning tunneling spectroscopy, obtained in either constant-current or constant-height mode. We extend this model to account for the effects of the in-plane momentum of the probed states to the overall current. We demonstrate the validity of the proposed scheme by applying it to laterally confined field-emission resonances, which appear as peak-shaped spectroscopic features with a well-defined in-plane momentum. |
| وصف الملف: | application/pdf |
| تدمد: | 2469-9969 2469-9950 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c5887d9b2fbc8ea8e7018e9ac5bf0463 https://doi.org/10.1103/physrevb.107.035406 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....c5887d9b2fbc8ea8e7018e9ac5bf0463 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 24699969 24699950 |
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