X. Zhou publishes new paper on tuning the properties of GeTe with Oxygen

Today, Xilin Zhou’s paper, which discusses how oxygen doping influences the the local structure of GeTe, has been published in ACS Applied Materials and Interfaces.

Interestingly when oxygen is added into GeTe, the energy required to switch the material in a phase change random access memory cell is lowered, yet counter intuitively the crystallization temperature is increased by O doping. Previously we showed that there is zero change in density for O concentrations of about 5 at.%. We believe that this allows the material to be switched with a lower enthalpy change, hence explaining the energy efficient  memory switching.

The paper is available here: http://pubs.acs.org/doi/abs/10.1021/acsami.6b05071

 

 

EPCOS 2016 – 3 papers accepted

Weiling Dong, Jitendra Behera, and Rob Simpson will present three papers at EPCOS 2016 in Cambridge, UK. The conference will be held in September 2016.

The papers are:

  • Wideband visible absorbers by Ge2Sb2Te5 and Al nanogratings, Weiling Dong, Yimei Qiu, Joel K.W. Yang, Robert E. Simpson, and Tun Cao
  • Laser switching of nanostructured phase change materials, Jitendra K. Behera, Xilin Zhou, and Robert E. Simpson
  • Genetic algorithm inspired design of Ge2Sb2Te5 structures, Robert E Simpson, Janne Kalikka, Jitendra K Behera, Giacomo Nannicini and Xilin Zhou 

     

See you in Cambridge!

ACTAlab welcomes MISTI students

ACTAlab is hosting three visiting students from MIT through the MISTI program.

Kaitlyn Mullin will be researching self organised dispersions of micropartcicles

Kiara Cui will be researching methods to screen chalcogenides for applications in photonics

Nina Anwar will be investigating the threshold switching effect in amorphous chalcogenide thin films.

W. Dong publishes new paper on wide band absorbers in the visible spectrum

Weiling Dong et al. has publsihed a paper in the Journal of Physical Chemistry C which describes how plasmonic nanogratings can be combined with phase change materials to create strong absorption in the visible spectrum. Weiling explained that the simple design of her structure will enable mass production of these super absorbers.

The research was conducted in collaboration with Prof Tun Cao of Dalian University of Technology, China.

ACTAlab is developing tuneable optical filters based on chalcogenides for a wide range of applications from displays to pollution detectors.