The unexpected superior switching performance (low leakage current, and steep sub-threshold slope) shown experimentally and analysed theoretically, demonstrate hitherto unexplored routes for improvements for transistors based on disordered silicon films.
By making the conduction channel in these disordered transistors very thin, the team has shown this technology will enable the design of low power memory for large area electronics based on a low-cost industry standard material processing route.
In the most recent investigations, the current of the devices, is found to be percolation governed when the channel is thinner than 3.0 nm due to strong quantum confinement induced potential variations over the active channel region. It is shown that the device channel width must be at least 0.3 µm to avoid percolative “pinch off” for 0.5 µm channel length devices. Theoretical analysis performed on the devices agrees well with the experimental data and provides important guidelines to model and optimize the devices for circuit design.
Dr Xiaojun Guo, one of the lead investigators, comments: “The nano-structure silicon thin-film transistors are very promising for design of low power electronics. However, carrier transport in such devices is very complicated, and results in electrical characteristics that may not be described by conventional field effect transistor (FET) models. This work reveals the key physical properties of the devices, which will help to further optimize and model the devices for circuit design”.
Professor Ravi Silva, Director of the Advanced Technology Institute adds: “This study is a prime example of how leading silicon technologies entrenched in industry can find alternative routes to improve on performance in device characteristics by clever design. The role that funding organizations such as EPSRC play in supporting this type of applied research is invaluable to the community and most importantly to industry”.The results are published in Applied Physics Letters 93 (2008) 042105.
Stuart Miller | alfa
First Juno science results supported by University of Leicester's Jupiter 'forecast'
26.05.2017 | University of Leicester
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24.05.2017 | Vienna University of Technology
Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
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Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
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