Model for electron spin resonance in STM noise
We propose a model to account for the observed ESR-like signal at the Larmor frequency in the current noise scanning tunnel microscope (STM) experiments identifying spin centers on various substrates. The theoretical understanding of this phenomenon, which allows for single spin detection on surface...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_10980121_v89_n7_p_Caso |
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todo:paper_10980121_v89_n7_p_Caso2023-10-03T16:06:27Z Model for electron spin resonance in STM noise Caso, A. Horovitz, B. Arrachea, L. We propose a model to account for the observed ESR-like signal at the Larmor frequency in the current noise scanning tunnel microscope (STM) experiments identifying spin centers on various substrates. The theoretical understanding of this phenomenon, which allows for single spin detection on surfaces at room temperature, is not settled for the experimentally relevant case that the tip and substrate are not spin polarized. Our model is based on a direct tip-substrate tunneling in parallel with a current flowing via the spin states. We find a sharp signal at the Larmor frequency even at high temperatures, in good agreement with experimental data. We also evaluate the noise in presence of an ac field near resonance and predict splitting of the signal into a Mollow triplet. © 2014 American Physical Society. Fil:Caso, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_10980121_v89_n7_p_Caso |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
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R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| description |
We propose a model to account for the observed ESR-like signal at the Larmor frequency in the current noise scanning tunnel microscope (STM) experiments identifying spin centers on various substrates. The theoretical understanding of this phenomenon, which allows for single spin detection on surfaces at room temperature, is not settled for the experimentally relevant case that the tip and substrate are not spin polarized. Our model is based on a direct tip-substrate tunneling in parallel with a current flowing via the spin states. We find a sharp signal at the Larmor frequency even at high temperatures, in good agreement with experimental data. We also evaluate the noise in presence of an ac field near resonance and predict splitting of the signal into a Mollow triplet. © 2014 American Physical Society. |
| format |
JOUR |
| author |
Caso, A. Horovitz, B. Arrachea, L. |
| spellingShingle |
Caso, A. Horovitz, B. Arrachea, L. Model for electron spin resonance in STM noise |
| author_facet |
Caso, A. Horovitz, B. Arrachea, L. |
| author_sort |
Caso, A. |
| title |
Model for electron spin resonance in STM noise |
| title_short |
Model for electron spin resonance in STM noise |
| title_full |
Model for electron spin resonance in STM noise |
| title_fullStr |
Model for electron spin resonance in STM noise |
| title_full_unstemmed |
Model for electron spin resonance in STM noise |
| title_sort |
model for electron spin resonance in stm noise |
| url |
http://hdl.handle.net/20.500.12110/paper_10980121_v89_n7_p_Caso |
| work_keys_str_mv |
AT casoa modelforelectronspinresonanceinstmnoise AT horovitzb modelforelectronspinresonanceinstmnoise AT arracheal modelforelectronspinresonanceinstmnoise |
| _version_ |
1782030544932962304 |