New Record in Nanoelectronics at Ultralow Temperatures
January 28, 2016 | Lancaster UniversityEstimated reading time: 2 minutes
The first ever measurement of the temperature of electrons in a nanoelectronic device a few thousandths of a degree above absolute zero was demonstrated in a joint research project performed by Lancaster University, VTT Technical Research Centre of Finland Ltd, and Aivon Ltd.
The team managed to make the electrons in a circuit on a silicon chip colder than had previously been achieved.
Dr Rich Haley, Head of Ultra Low Temperature Physics at Lancaster, said: “This is a notable achievement in that the team has finally broken through the 4 millikelvin barrier, which has been the record in such structures for over 15 years.”
Although it has long been possible to cool samples of bulk metals even below 1 millikelvin, it has proved very difficult to transfer this temperature to electrons in small electronic devices, mainly because the interaction between the conducting electrons and the crystal lattice becomes extremely weak at low temperatures.
By combining state-of-the-art micro and nanofabrication and pioneering measurement approaches the research team realized ultralow electron temperatures reaching 3.7 millikelvin in a nanoelectronic electron tunnelling device. A scientific article on the subject has been published in Nature Communications.
This breakthrough paves the way towards sub-millikelvin nanoelectronic circuits and is another step on the way to develop new quantum technologies including quantum computers and sensors. Quantum technologies use quantum mechanical effects to outperform any possible technology based only on classical physics.
In general, many high sensitivity magnetic field sensors and radiation detectors require low temperatures simply to reduce detrimental thermal noise.
This work marks the creation of a key enabling technology which will facilitate R&D in nanoscience, solid-state physics, materials science and quantum technologies. The demonstrated nanoelectronic device is a so-called primary thermometer, i.e., a thermometer which requires no calibration.
This makes the technology very attractive for low temperature instrumentation applications and metrology.
Dr Jon Prance of the Lancaster Quantum Technology Centre said: "Not only have we measured the coldest ever nanoelectronics temperature, but we have also demonstrated techniques which open the door to even lower temperatures."
The breakthrough was made possible by bringing together internationally-leading groups and experts each of whom have their own track record of achievements in the fields of nanotechnologies and high performance sensors (VTT Technical Research Centre of Finland Ltd), custom low-noise electronics (Aivon Ltd, Finland) and ultralow temperature refrigeration and device characterization (Ultra Low Temperature Physics group and Quantum Technology Centre at Lancaster).
VTT is looking into possibilities together with BlueFors Cryogenics to commercialise the primary thermometer component.
Suggested Items
I-Connect007 Editor’s Choice: Five Must-Reads for the Week
05/10/2024 | Marcy LaRont, PCB007 MagazineSpring is a renewal each year as dormant flora bloom, and baby ducklings and geese are ever present in local bodies of water. Even though it is beginning to get hot, I love this time of year in Arizona, with the sun waking me around 5 a.m. It fills me with an energy that I often lose in the dark winter months. Wherever you find yourself in the world, I hope you are enjoying Spring and that you are filled with energy and enthusiasm for all the great work part of our daily lives in this industry.
Samsung Acquires Sonio; Strengthens Position in Cutting-Edge Medical Devices
05/10/2024 | SamsungSamsung Medison, a global medical equipment company and an affiliate of Samsung Electronics, today announced it has signed an agreement to acquire 100% of the shares of Sonio SAS, a fetal ultrasound AI software company.
Schweizer Receives Future Prize from Ewald Marquardt Private Foundation for p² Pack Embedding Technology
05/10/2024 | Schweizer Electronic AGAs the number of electric vehicles increases, so do the demands on electrical power management in vehicles. To make power generation and engine operation more efficient, Schweizer Electronic AG's p² Pack technology offers a long-term and sustainable solution to better convert and even recover the energy generated.
MKS’ Atotech to Participate in ECTC
05/10/2024 | MKS’ AtotechAt this year’s 74th IEEE Electronic Components and Technology Conference (ECTC), MKS’ Atotech will present and demonstrate its latest product and service innovations.
TTM Technologies Appoints Wajid Ali to Board of Directors
05/10/2024 | TTM Technologies, Inc.TTM Technologies, Inc. announced that Mr Wajid Ali has been appointed by the unanimous vote of the remaining Directors to serve as a new Class I director on the Board, effective immediately.