Performance benchmarking of an ultra-low vibration laboratory to host a commercial millikelvin scanning tunnelling microscope
Ultra-low temperature scanning tunnelling microscopy and spectroscopy (STM/STS) achieved by dilution refrigeration can provide unrivalled insight into the local electronic structure of quantum materials and atomic-scale quantum systems. Effective isolation from mechanical vibration and acoustic nois...
| Main Authors: | , , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
2024
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| Online Access: | https://hdl.handle.net/10356/175471 |
| _version_ | 1811684743637368832 |
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| author | Que, Yande Kumar, Amit Lodge, Michael S. Tong, Zheng Jue Lai, Marcus Kar Fai Tao, Wei Cui, Zhenhao Shivajirao, Ranjith Jia, Junxiang Lee, Siew Eang Weber, Bent |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Que, Yande Kumar, Amit Lodge, Michael S. Tong, Zheng Jue Lai, Marcus Kar Fai Tao, Wei Cui, Zhenhao Shivajirao, Ranjith Jia, Junxiang Lee, Siew Eang Weber, Bent |
| author_sort | Que, Yande |
| collection | NTU |
| description | Ultra-low temperature scanning tunnelling microscopy and spectroscopy (STM/STS) achieved by dilution refrigeration can provide unrivalled insight into the local electronic structure of quantum materials and atomic-scale quantum systems. Effective isolation from mechanical vibration and acoustic noise is critical in order to achieve ultimate spatial and energy resolution. Here, we report on the design and performance of an ultra-low vibration (ULV) laboratory hosting a customized but otherwise commercially available 40 mK STM. The design of the vibration isolation consists of a T-shaped concrete mass block (∼55t), suspended by actively controlled pneumatic springs, and placed on a foundation separated from the surrounding building in a 'room-within-a-room' design. Vibration levels achieved are meeting the VC-M vibration standard at >3 Hz, reached only in a limited number of laboratories worldwide. Measurement of the STM's junction noise confirms effective vibration isolation on par with custom built STMs in ULV laboratories. In this tailored low-vibration environment, the STM achieves an energy resolution of 43μeV (144 mK), promising for the investigation and control of quantum matter at atomic length scales. |
| first_indexed | 2024-10-01T04:33:29Z |
| format | Journal Article |
| id | ntu-10356/175471 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:33:29Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | ntu-10356/1754712024-04-29T15:37:22Z Performance benchmarking of an ultra-low vibration laboratory to host a commercial millikelvin scanning tunnelling microscope Que, Yande Kumar, Amit Lodge, Michael S. Tong, Zheng Jue Lai, Marcus Kar Fai Tao, Wei Cui, Zhenhao Shivajirao, Ranjith Jia, Junxiang Lee, Siew Eang Weber, Bent School of Physical and Mathematical Sciences Physics Actively controlled pneumatic isolation Dilution refrigeration Ultra-low temperature scanning tunnelling microscopy and spectroscopy (STM/STS) achieved by dilution refrigeration can provide unrivalled insight into the local electronic structure of quantum materials and atomic-scale quantum systems. Effective isolation from mechanical vibration and acoustic noise is critical in order to achieve ultimate spatial and energy resolution. Here, we report on the design and performance of an ultra-low vibration (ULV) laboratory hosting a customized but otherwise commercially available 40 mK STM. The design of the vibration isolation consists of a T-shaped concrete mass block (∼55t), suspended by actively controlled pneumatic springs, and placed on a foundation separated from the surrounding building in a 'room-within-a-room' design. Vibration levels achieved are meeting the VC-M vibration standard at >3 Hz, reached only in a limited number of laboratories worldwide. Measurement of the STM's junction noise confirms effective vibration isolation on par with custom built STMs in ULV laboratories. In this tailored low-vibration environment, the STM achieves an energy resolution of 43μeV (144 mK), promising for the investigation and control of quantum matter at atomic length scales. Ministry of Education (MOE) National Research Foundation (NRF) Submitted/Accepted version This work is supported by National Research Foundation (NRF) Singapore, under the Competitive Research Programme “Towards On-Chip Topological Quantum Devices” (NRF- CRP21-2018-0001), with partial support from a Singapore Ministry of Education (MOE) Academic Research Fund Tier 3 grant (MOE2018-T3-1-002). B.W. acknowledges a Singapore National Research Foundation (NRF) Fellowship (NRF-NRFF2017-11). 2024-04-25T02:38:44Z 2024-04-25T02:38:44Z 2023 Journal Article Que, Y., Kumar, A., Lodge, M. S., Tong, Z. J., Lai, M. K. F., Tao, W., Cui, Z., Shivajirao, R., Jia, J., Lee, S. E. & Weber, B. (2023). Performance benchmarking of an ultra-low vibration laboratory to host a commercial millikelvin scanning tunnelling microscope. Nanotechnology, 34(45), 455704-. https://dx.doi.org/10.1088/1361-6528/acebf7 0957-4484 https://hdl.handle.net/10356/175471 10.1088/1361-6528/acebf7 37524072 2-s2.0-85168428014 45 34 455704 en NRF- CRP21-2018-0001 MOE2018-T3-1-002 NRF-NRFF2017-11 Nanotechnology 10.21979/N9/GC4UUT © 2023 IOP Publishing Ltd. All rights reserved. This article may be downloaded for personal use only. Any other use requires prior permission of the copyright holder. The Version of Record is available online at http://doi.org/10.1088/1361-6528/acebf7. application/pdf |
| spellingShingle | Physics Actively controlled pneumatic isolation Dilution refrigeration Que, Yande Kumar, Amit Lodge, Michael S. Tong, Zheng Jue Lai, Marcus Kar Fai Tao, Wei Cui, Zhenhao Shivajirao, Ranjith Jia, Junxiang Lee, Siew Eang Weber, Bent Performance benchmarking of an ultra-low vibration laboratory to host a commercial millikelvin scanning tunnelling microscope |
| title | Performance benchmarking of an ultra-low vibration laboratory to host a commercial millikelvin scanning tunnelling microscope |
| title_full | Performance benchmarking of an ultra-low vibration laboratory to host a commercial millikelvin scanning tunnelling microscope |
| title_fullStr | Performance benchmarking of an ultra-low vibration laboratory to host a commercial millikelvin scanning tunnelling microscope |
| title_full_unstemmed | Performance benchmarking of an ultra-low vibration laboratory to host a commercial millikelvin scanning tunnelling microscope |
| title_short | Performance benchmarking of an ultra-low vibration laboratory to host a commercial millikelvin scanning tunnelling microscope |
| title_sort | performance benchmarking of an ultra low vibration laboratory to host a commercial millikelvin scanning tunnelling microscope |
| topic | Physics Actively controlled pneumatic isolation Dilution refrigeration |
| url | https://hdl.handle.net/10356/175471 |
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