How cold is the junction of a millikelvin scanning tunnelling microscope?
| العنوان: | How cold is the junction of a millikelvin scanning tunnelling microscope? |
|---|---|
| المؤلفون: | Taner Esat, Xiaosheng Yang, Farhad Mustafayev, Helmut Soltner, Frank Tautz, Ruslan Temirov |
| بيانات النشر: | Research Square Platform LLC, 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), FOS: Physical sciences |
| الوصف: | We employ a scanning tunnelling microscope (STM) cooled to millikelvin temperatures by an adiabatic demagnetization refrigerator (ADR) to perform scanning tunnelling spectroscopy (STS) on an atomically clean surface of Al(100) in a superconducting state using normal-metal and superconducting STM tips. Varying the ADR temperatures between 30 mK and 1.2 K, we show that the temperature of the STM junction $T$ is decoupled from the temperature of the surrounding environment $T_{\mathrm{env}}$. Simulating the STS data with the $P(E)$ theory, we determine that $T_{\mathrm{env}} \approx 1.5$ K, while the fitting of the superconducting gap spectrum yields the lowest $T=77$ mK. Comment: 12 pages, 10 figures |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::211564638ce585c8f90c1240d663769b https://doi.org/10.21203/rs.3.rs-2189516/v1 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....211564638ce585c8f90c1240d663769b |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |