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Primeur weekly 2020-05-18

Focus

SiPearl's chip will be a platform open to other start-ups to develop accelerators for - An interview with Philippe Notton from SiPearl ...

Exascale supercomputing

Atos launches first supercomputer equipped with NVIDIA A100 GPU ...

Quantum computing

Start of the Fraunhofer Competence Center "Quantum Computing Baden-Württemberg" ...

ADVA brings post-quantum security to packet networks ...

Atos delivers its Quantum Learning Machine to Japan ...

Machine learning cracks quantum chemistry conundrum ...

Making quantum 'waves' in ultrathin materials ...

Seeqc UK awarded GBP 1,8 million in grants to advance quantum computing initiatives ...

Rising investments in quantum technology to boost market growth ...

Total is exploring quantum algorithms to improve CO2 capture ...

Middleware

Mentor Graphics and the University of Basel join the OpenMP effort ...

Hardware

NVIDIA's new Ampere data centre GPU in full production ...

Karlsruhe Institute of Technology procures new supercomputer ...

DDN announces A3I suppport for NVIDIA DGX A100 ...

Yvonne Walker recognized as one of CRN's 2020 Women of the Channel ...

Supermicro expands portfolio with fully integrated NVIDIA A100 GPU-powered systems delivering 5 Petaflop/s of AI performance in a single 4U server ...

Artificial synapses on design ...

Light, fantastic: the path ahead for faster, smaller computer processors ...

OpenFabrics Alliance (OFA) and Gen-Z Consortium announce MoU agreement ...

Tachyum achieves 90 percent of silicon laid for its Prodigy Universal Processor ...

Intel Capital invests $132 million in 11 disruptive technology start-ups ...

Inspur releases five new AI servers powered by NVIDIA A100 Tensor Core GPUs ...

Research and Markets issues Global High-Performance Computing as a Service Market Analysis and Industry Forecasts to 2026 ...

Asperitas and maincubes partner to deliver immersion cooling solutions in dedicated colocation suites ...

Delivery of supercomputer Fugaku completed ...

Applications

Supercomputer simulations help advance electrochemical reaction research ...

3D-printed nuclear reactor promises faster, more economical path to nuclear energy ...

GCS centres support research to mitigate impact of COVID-19 pandemic ...

NIST scientists create new recipe for single-atom transistors ...

ACM service awards recognize leaders who strengthen the computing community ...

New research launched on airborne virus transmission in buildings ...

Seeing the universe through new lenses ...

Liqid delivers industry's fastest single-socket server ...

National Science Foundation grant backs funcX: A smart, automated delegator for computational research ...

Educating the next generation of supercomputer users with Blue Waters ...

The Cloud

Innovium introduces TERALYNX 8, world's highest performance programmable switch for data centre networks with 25,6 Tbps throughput and support for 112 Gbps SerDes I/O ...

Wiwynn unveils standalone rack-level liquid cooling solution for OCP ORV3 at 2020 OCP Virtual Summit ...

Crowd Machine Platform is powered by Oracle Cloud and now available in the Oracle Cloud Marketplace ...

Making quantum 'waves' in ultrathin materials


Illustration of plasmon waves created by an ultrafast laser coupled to an atomic force microscopy tip. The plasmon waves are shown as concentric red and blue rings moving slowly across an atomically thin layer of tantalum disulfide. Credit: Felipe da Jornada/Berkeley Lab.
14 May 2020 Berkeley - Wavelike, collective oscillations of electrons known as "plasmons" are very important for determining the optical and electronic properties of metals.

In atomically thin 2D materials, plasmons have an energy that is more useful for applications, including sensors and communication devices, than plasmons found in bulk metals. But determining how long plasmons live and whether their energy and other properties can be controlled at the nanoscale (billionths of a meter) has eluded many.

Now, as reported in the journal Nature Communications , a team of researchers co-led by the Department of Energy's Lawrence Berkeley National Laboratory - with support from the Department of Energy's Center for Computational Study of Excited-State Phenomena in Energy Materials (C2SEPEM) - has observed long-lived plasmons in a new class of conducting transition metal dichalcogenide (TMD) called "quasi 2D crystals".

To understand how plasmons operate in quasi 2D crystals, the researchers characterized the properties of both non-conductive electrons as well as conductive electrons in a monolayer of the TMD tantalum disulfide. Previous studies only looked at conducting electrons. "We discovered that it was very important to carefully include all the interactions between both types of electrons", stated C2SEPEM Director Steven Louie, who led the study. Louie also holds titles as senior faculty scientist in the Materials Sciences Division at Berkeley Lab and professor of physics at UC Berkeley.

The researchers developed sophisticated new algorithms to compute the material's electronic properties, including plasmon oscillations with long wavelengths, "as this was a bottleneck with previous computational approaches", stated lead author Felipe da Jornada, who was a postdoctoral researcher in Berkeley Lab's Materials Sciences Division at the time of the study. Felipe da Jornada is currently an assistant professor in materials science and engineering at Stanford University.

To the researchers' surprise, the results from calculations performed by the Cori supercomputer at Berkeley Lab's National Energy Research Scientific Computing Center (NERSC) revealed that plasmons in quasi 2D TMDs are much more stable - for as long as approximately 2 picoseconds, or 2 trillionths of a second - than previously thought.

Their findings also suggest that plasmons generated by quasi 2D TMDs could enhance the intensity of light by more than 10 million times, opening the door for renewable chemistry - chemical reactions triggered by light, or the engineering of electronic materials that can be controlled by light.

In future studies, the researchers plan to investigate how to harness the highly energetic electrons released by such plasmons upon decay, and if they can be used to catalyze chemical reactions.

Lede Xian and Angel Rubio of the Max Planck Institute for the Structure and Dynamics of Matter in Hamburg, Germany, contributed to the study.

This study was supported by the Center for Computational Study of Excited-State Phenomena in Energy Materials (C2SEPEM) funded by the U.S. Department of Energy, Office of Basic Energy Sciences. Additional support was provided by the National Science Foundation and the European Research Council.
Source: DOE/Lawrence Berkeley National Laboratory

Back to Table of contents

Primeur weekly 2020-05-18

Focus

SiPearl's chip will be a platform open to other start-ups to develop accelerators for - An interview with Philippe Notton from SiPearl ...

Exascale supercomputing

Atos launches first supercomputer equipped with NVIDIA A100 GPU ...

Quantum computing

Start of the Fraunhofer Competence Center "Quantum Computing Baden-Württemberg" ...

ADVA brings post-quantum security to packet networks ...

Atos delivers its Quantum Learning Machine to Japan ...

Machine learning cracks quantum chemistry conundrum ...

Making quantum 'waves' in ultrathin materials ...

Seeqc UK awarded GBP 1,8 million in grants to advance quantum computing initiatives ...

Rising investments in quantum technology to boost market growth ...

Total is exploring quantum algorithms to improve CO2 capture ...

Middleware

Mentor Graphics and the University of Basel join the OpenMP effort ...

Hardware

NVIDIA's new Ampere data centre GPU in full production ...

Karlsruhe Institute of Technology procures new supercomputer ...

DDN announces A3I suppport for NVIDIA DGX A100 ...

Yvonne Walker recognized as one of CRN's 2020 Women of the Channel ...

Supermicro expands portfolio with fully integrated NVIDIA A100 GPU-powered systems delivering 5 Petaflop/s of AI performance in a single 4U server ...

Artificial synapses on design ...

Light, fantastic: the path ahead for faster, smaller computer processors ...

OpenFabrics Alliance (OFA) and Gen-Z Consortium announce MoU agreement ...

Tachyum achieves 90 percent of silicon laid for its Prodigy Universal Processor ...

Intel Capital invests $132 million in 11 disruptive technology start-ups ...

Inspur releases five new AI servers powered by NVIDIA A100 Tensor Core GPUs ...

Research and Markets issues Global High-Performance Computing as a Service Market Analysis and Industry Forecasts to 2026 ...

Asperitas and maincubes partner to deliver immersion cooling solutions in dedicated colocation suites ...

Delivery of supercomputer Fugaku completed ...

Applications

Supercomputer simulations help advance electrochemical reaction research ...

3D-printed nuclear reactor promises faster, more economical path to nuclear energy ...

GCS centres support research to mitigate impact of COVID-19 pandemic ...

NIST scientists create new recipe for single-atom transistors ...

ACM service awards recognize leaders who strengthen the computing community ...

New research launched on airborne virus transmission in buildings ...

Seeing the universe through new lenses ...

Liqid delivers industry's fastest single-socket server ...

National Science Foundation grant backs funcX: A smart, automated delegator for computational research ...

Educating the next generation of supercomputer users with Blue Waters ...

The Cloud

Innovium introduces TERALYNX 8, world's highest performance programmable switch for data centre networks with 25,6 Tbps throughput and support for 112 Gbps SerDes I/O ...

Wiwynn unveils standalone rack-level liquid cooling solution for OCP ORV3 at 2020 OCP Virtual Summit ...

Crowd Machine Platform is powered by Oracle Cloud and now available in the Oracle Cloud Marketplace ...