French style good bye party with friends and wine. We wish best for Laurent!
French style good bye party with friends and wine. We wish best for Laurent!
The National Research Foundation (NRF) intenational advisory panel to review progress of Competitive Research Programme (CRP) project . They are impressed with our industry focus research.
Graphene exhibits weak intrinsic spin-orbit coupling (SOC; hence, it is suitable for use in spintronics applications that require a long spin mean-free path of charge carriers. Due to the weak SOC, the control over the spin is also poor. However, the proximity effect can be leveraged for overcoming this limitation. By depositing graphene on a tungsten disulphide substrate, the strong SOC properties of the substrate are taken up by graphene. Using graphene with both weak and strong SOC, developing a graphene-based spin field effect transistor at room temperature is expected to get closer.
For exploring the non-local magneto-resistance in graphene deposited on a tungsten disulphide (WS2), a high magnetic field with two orientations with reference to the graphene plane is used. Based on these measurements, the orbital and the spin effects are distinguished. A rotational probe (Figure 1) is used to safeguard the sample from ambient conditions in all the experiments. This probes are designed specifically for spin transport measurements in TeslatronTMPT Cryofree® system (Figure2).
Figure 1. Rotating probe with chip holder
Figure 2. TeslatronTMPT Cryofree® system at Barbaros Ozyilmaz lab
You can find more information here: https://www.azonano.com/article.aspx?ArticleID=4156
Deputy Prime Minister and Chairman of National Research Foundation (NRF), Mr. Teo Chee Hean, accompanied by NUS President, Prof. Tan Chorh Chuan, the Permanent Secretary of NRF and Public Service Division, Ms. Yong Ying-I, and the CEO of NRF, Prof. Low Teck Seng, visited our Centre on 26 September 2017.
During the visit, Prof Antonio Castro Neto, Director of CA2DM and Prof Barbaros Oezyilmaz, Deputy Director (Translation) of CA2DM’s Office for Industry and Innovation (OII), shared with DPM Teo on the achievements of the Centre and how we translate scientific research to industry applications by supporting researchers to validate and benchmark their technologies and working closely with industry partners to identify graphene’s unique properties relevant for their needs.
There was also a presentation and demonstration on CA2DM’s 2D materials-based magnetic sensor, which is developed and fabricated entirely within CA2DM’s Micro and Nano Fabrication Facility, using latest state-of-art tools such as Electron Beam Lithography. It is possibly the thinnest ever magnetic field sensor which allows it to be integrated effectively and customised into any industrial applications such as bio-medical fields, petroleum pipe-lines inspection gauges etc.
DPM shared the visit to CA2DM on his facebook page: https://www.facebook.com/MrTeoCheeHean/posts/1389607417784097
This is a 3U CubeSat Structure with experimental housing — The Centre for Advanced Two-Dimensional Materials (CA2DM) of the National University of Singapore (NUS) has partnered with US-based Boreal Space to test the properties of graphene material after it has been launched into the stratosphere.
During this launch, the graphene material will be subjected to rapid acceleration, vibration, acoustic shock, strong pressure, and a wide range in temperature fluctuations. The research team will retrieve the graphene material and will be testing its properties to see if it was able to resist the various challenges imposed by the launch environment. Technologies that push the limits in graphene research by demonstrating electro-magnetic shielding; efficient solar power generation; and excellent thermal protection.
Professor Barbaros Özyilmaz group is opening a Research Assistant position to support advanced electronics and spintronics research based on 2D materials. Our group is at the forefront of 2D materials-based spintronics research and we are exploring exotic Majorana bound states in van der Waals heterostructures for topological quantum computation.
Your role will be to fabricate van der Waals heterostructures devices by exfoliation, characterisation and transfer of 2D materials. You will also have the opportunity to develop new processes for more reliable exfoliation and optical determination of 2D materials thickness. You will be able to participate in authoring scientific manuscripts.
For a better understanding of our group, please visit: http://graphene.nus.edu.sg/barbaros.
Please send your application, CV and contact details to firstname.lastname@example.org
Prof Barbaros Özyilmaz’s group at the National University of Singapore (NUS) is looking for a Post-Doctoral researcher to explore Majorana Bound States (MBS) in van der Waals heterostructures consisting of 2D materials such as graphene, black phosphorus, boron nitride, 2D ferromagnetic insulators (Cr2Ge2Te6, CrI3, etc.) and 2D superconductors (NbSe2, BSCCO, etc.). Your role will be to investigate these building block materials, study the interfacial effects when these materials are brought into proximity and eventually assemble them together to realize MBS, the ingredient for topological qubits.
The realization of MBS in semiconductor-superconductor nanowire heterostructure was a breakthrough in the experimental implementation of topological quantum computation. However, braiding operation of MBS, which is the basic operation of a topological quantum computer, requires a branched junction that is extremely challenging to realize in nanowire-based devices. Extension to 2D semiconductor heterostructure (2DEG) is a natural direction. However, 2DEG is buried between buffer layers and as a result, proximity effect is very weak. Here, van der Waals heterostructures offer unique advantages. The interface between 2D materials in a van der Waals heterostructure can be atomically clean, leading to much stronger proximity effects. The recent emergence of 2D ferromagnetic insulators open new doors to engineer MBS without external magnetic field. This greatly relaxes the design constraints and vastly expands the choices of allowed material combinations. Ultimately, the combination of superior properties of 2D materials and strong interactions may enable the demonstration of braiding operation and stable topological qubits with long decoherence time.
Our related works in this area:
More information about the project, the lab and facilities can be found at the group website: https://graphene.nus.edu.sg/barbaros/
In this frame, we are looking for a highly motivated candidate holding (or about to hold) a PhD in Physics, Material Science, or related disciplines. The ideal candidate is expected to demonstrate:
Please send your Cover Letter, CV (with publication list) and contact details to email@example.com
High crystallinity combined with atomic thinness unlock some unique applications for two-dimensional (2D) materials in the field of human-machine interfaces and flexible electronics.
Although graphene is very promising for spin communication due to its extraordinary electron mobility, the lack of a bandgap restricts its prospects for semiconducting spin devices such as spin diodes and bipolar spin transistors. The recent emergence of black phosphorus, a high-mobility two-dimensional semiconductor, could help overcome this basic challenge. In this letter we report an important step towards making two-dimensional semiconductor spin devices. We have fabricated a spin valve based on ultrathin (~5 nm) semiconducting black phosphorus (bP), and established fundamental spin properties of this spin channel material, which supports all electrical spin injection, transport, precession and detection up to room temperature. In the non-local spin valve geometry we measure Hanle spin precession and observe spin relaxation times as high as 4 ns, with spin relaxation lengths exceeding 6 μm. Our experimental results are in a very good agreement with first-principles calculations and demonstrate that the Elliott–Yafet spin relaxation mechanism is dominant. We also show that spin transport in ultrathin bP depends strongly on the charge carrier concentration, and can be manipulated by the electric field effect.
Want to work on high-impact research with a team of dedicated and passionate scientists? Our group is currently looking for new Post-Doctoral Researchers and Research Assistant to join our team. The detailed descriptions are in the links below and if you think you are a good fit for the job, please send your CV to Prof. Barbaros at firstname.lastname@example.org.