News

Yoon’s group is building on the dedication and efforts by highly motivated researchers. The work primarily led by three undergrad students (Eric Snyder, Dean Collett, Zijian Wang) has been accepted for the presentation at the MRS Spring meeting (April 17 -21, 2017; Phoenix, Arizona). For this work, Eric Snyder (ECE senior) has developed MATLAB programs to decouple the complicated electron beam signals on topological insulators.

The University of Utah provides UROP program for well-qualified students, and the MRSEC invites summer REU students.

Yoon’s Research Group is seeking for new group members (undergraduate, graduate, and post-doc). In particular, we have open RA position(s) for well-qualified Ph.D. students in Fall 2017. Please feel free to contact Prof. Yoon (heayoung.yoon@utah.edu) if you are interested in.

Hiring2017

Dr. Yoon presented her research work at the ECE Graduate Seminar on October 17. She also gave an invited talk in the Physics department on October 18.

Yoon’s Research group published a journal paper on EBIC (Electron Beam Induced Current) analysis in collaboration with researchers (Dr. Paul Haney, Dr. Benoit Gaury, Dr. Nikolai Zhitenev) in the CNST (Center for Nanoscale Science and Technology) at the National Institute of Standards and Technology.

Paper LINK

Dr. Yoon gave an invited seminar on August 31 at the Center for Integrated Nanotechnology in the Los Alamos National Laboratory (Title: Nanoscale EBIC Characterizations of Inhomogeneous Thin Film Solar Cells). Her group will be closely working with the CINT researchers on projects involving nanowires and quantum dots.

Congratulations to Dean Collett, Eric Snyder, and Zijian Wang, who won UROP Awards!

Students from various disciplines around the University of Utah campus write research proposals to compete for the funded research program. UROP (Undergraduate Research Opportunities Program) provides assistantships up to $1,200 for each awardee. More information: http://our.utah.edu/for-students/urop/

Austin Koch, an REU (Research Experience for Undergraduates) participant, gave a poster presentation on August 5 at the Chemistry Atrium in Henry Eyring Building. His work focused on the nanoscale compositional analysis of topological insulators and 3D Dirac semimetals.

The samples were provided by Prof. Taylor Sparks (MSE) and Prof. Vikram Deshpande (Physics). The high-resolution STEM/EDX measurements were performed in the Utah Nanofab. Thank for the great help from the TEM experts (Dr. Jeffery Aguiar, Dr. Brian Devener) and Yoon’s Research Group members (Eric Snyder, Alvaro Bonilla, Dean Collett, Zijian, Wang).

Abstract: Topological insulators are a new class of materials in which the surface has a high conductivity similar to graphene, while the interior bulk has an insulating property. In order to realize the high performance optoelectronic devices, homogeneous materials are required. In this work, we investigated the surface and interior bulk properties of two materials (Cd3As2 Dirac semimetal and BiSbTeSe2 topological insulator) to determine local structural, compositional or fabrication-based anomalies.