NMR of a single nuclear spin detected by a scanning tunneling microscope
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2024
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866911820396101632 |
|---|---|
| author | Manassen, Yishay Averbukh, Michael Hazan, Zion Tzuriel, Yahel Boscolo, Pino Shnirman, Alexsander Horovitz, Baruch |
| author_facet | Manassen, Yishay Averbukh, Michael Hazan, Zion Tzuriel, Yahel Boscolo, Pino Shnirman, Alexsander Horovitz, Baruch |
| contents | We demonstrate ionization of a molecule with the bias voltage of a Scanning Tunnelling Microscope (STM) resulting in a coexistence of a neutral and ionic molecules, i.e. radical (paramagnetic) and non-radical (diamagnetic) states. This coexistence may be facilitated by a periodic switching between two bias voltages. The precession of the nucleus in the diamagnetic state modulates the nuclear polarization as well as the hyperfine transitions as seen in electron spin resonance (ESR). We analyze the power spectrum of a selected hyperfine intensity and obtain the nuclear magnetic resonance (NMR) spectrum. We have observed this phenomenon in three types of molecules: TEMPO, toluene and triphenylphosphine, showing NMR of $^{14}$N, $^{13}$C, $^{31}$P and $^1$H nuclei. The spectra are detailed and show signatures of the chemical environment, i.e. chemical shifts. A master equation including off-diagonal hyperfine interactions accounts for these observations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_00273 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | NMR of a single nuclear spin detected by a scanning tunneling microscope Manassen, Yishay Averbukh, Michael Hazan, Zion Tzuriel, Yahel Boscolo, Pino Shnirman, Alexsander Horovitz, Baruch Mesoscale and Nanoscale Physics We demonstrate ionization of a molecule with the bias voltage of a Scanning Tunnelling Microscope (STM) resulting in a coexistence of a neutral and ionic molecules, i.e. radical (paramagnetic) and non-radical (diamagnetic) states. This coexistence may be facilitated by a periodic switching between two bias voltages. The precession of the nucleus in the diamagnetic state modulates the nuclear polarization as well as the hyperfine transitions as seen in electron spin resonance (ESR). We analyze the power spectrum of a selected hyperfine intensity and obtain the nuclear magnetic resonance (NMR) spectrum. We have observed this phenomenon in three types of molecules: TEMPO, toluene and triphenylphosphine, showing NMR of $^{14}$N, $^{13}$C, $^{31}$P and $^1$H nuclei. The spectra are detailed and show signatures of the chemical environment, i.e. chemical shifts. A master equation including off-diagonal hyperfine interactions accounts for these observations. |
| title | NMR of a single nuclear spin detected by a scanning tunneling microscope |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2404.00273 |