dorsal/arxiv
View SchemaRoom-temperature tunnel current amplifier and experimental setup for high resolution electronic spectroscopy in millikelvin STM experiments
| Authors | H. Le Sueur, P. Joyez |
|---|---|
| Categories | |
| ArXiv ID | physics/0610280 |
| URL | https://arxiv.org/abs/physics/0610280 |
| DOI | 10.1063/1.2400024 |
| Journal | Review of Scientific Instruments 77 (12/2006) 123701 |
Abstract
The spectroscopic resolution of tunneling measurements performed with a scanning tunneling microscope is ultimately limited by the temperature at which the experiment is performed. To take advantage of the potential high spectroscopic resolution associated with operating an STM in a dilution refrigerator we have designed a room temperature tunnel current amplifier having very small back-action on the tunnel contact and allowing to nearly reach the predicted energy resolution. This design is a modification of the standard op-amp based tip-biasing current-voltage converter which implements differential voltage sensing and whose back action on the tip voltage is only ~2 $\mu$V rms for a 14 MV/A transimpedance and 22 kHz bandwidth.
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"abstract": "The spectroscopic resolution of tunneling measurements performed with a\nscanning tunneling microscope is ultimately limited by the temperature at which\nthe experiment is performed. To take advantage of the potential high\nspectroscopic resolution associated with operating an STM in a dilution\nrefrigerator we have designed a room temperature tunnel current amplifier\nhaving very small back-action on the tunnel contact and allowing to nearly\nreach the predicted energy resolution. This design is a modification of the\nstandard op-amp based tip-biasing current-voltage converter which implements\ndifferential voltage sensing and whose back action on the tip voltage is only\n~2 $\\mu$V rms for a 14 MV/A transimpedance and 22 kHz bandwidth.",
"arxiv_id": "physics/0610280",
"authors": [
"H. Le Sueur",
"P. Joyez"
],
"categories": [
"physics.ins-det"
],
"doi": "10.1063/1.2400024",
"journal_ref": "Review of Scientific Instruments 77 (12/2006) 123701",
"title": "Room-temperature tunnel current amplifier and experimental setup for high resolution electronic spectroscopy in millikelvin STM experiments",
"url": "https://arxiv.org/abs/physics/0610280"
},
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