We are hiring!

The ACTAlab (www.actalab.com/) at SUTD seeks applicants for a full-time postdoctoral position in theoretical materials science. The successful candidate will apply Density Functional Theory (DFT) methods to study structural phase transitions. In particular, the aim will be to understand, design, and optimise phase change materials for electrical memory applications. The position involves collaborating work with experimentalists who are also studying these phase transitions. The ideal candidate will have:

  • a PhD in Physics, Material Science, or a related field.
  • knowledge and experience using density functional theory codes.
  • a thorough understanding of condensed matter science.
  • high level of motivation.
  • a positive personality.
  • a good level of written and verbal English communication.
  • a proven publication record.
  • experience with VASP and good programming skills will be an advantage.
  • he/she should also be willing to work in collaboration with experimentalists.

Apply here: https://people.sutd.edu.sg/~robert_simpson/?page_id=700

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.