Wafer-scale MOCVD growth of monolayer MoS2 on sapphire and SiO2

Strongly Correlated Electron Systems

Electronic correlations, namely electron-electron interactions and electron-lattice interactions lead to exotic phenomena in solid state mater. In our lab our focus is on various aspects of strongly correlated materials. Our research begins from investigation of high quality novel materials synthesis and spans investigation of low temperature electronics and optoelectronics of novel devices.

Atomically Thin And A Few Nm Thick Transition Metal Compounds

SCMLab research begins at the synthesis level. Our main focus lies compounds of transition metals with group 6a elements. In particular we are interested in understanding the synthesis routes that lead to atomically thin transition metal dichalcogenides and VO2 nanocrystals. In our most recent effort we developed a chemical vapour deposition synthesis chamber that allows real time optical observation and control of the synthesis.

The video shows real time formation of atomically thin WSe₂ crystals. This is a first ever demonstration of monolayer TMDC crystals forming in real time.  Taken from our recent pre-print “Real time optical observation and control of atomically thin transition metal dichalcogenide synthesis”.

Funding: TUBİTAK 1001 #116M226

Relevant Publications:
Synthesis of V₂O₃ nanoplates for exploring correlated supercritical state
Physical Review B (Rapid Communications), 100, 161107(R), 2019.

Hamid Reza Rasouli, Naveed Mehmood, Onur Çakıroğlu, Engin Can Sürmeli, T. Serkan Kasırga

[doi] [arXiv]

Real time optical observation and control of atomically thin transition metal dichalcogenide synthesis.
Nanoscale (2019).
Hamid Reza Rasouli, Naveed Mehmood, Onur Çakıroğlu and T. Serkan Kasırga.
[doi]

Chemical vapor transport synthesis of a selenium-based two-dimensional material.
Turkish Journal of Physics, 42(3):293-301, 2018.
T. Serkan Kasırga.
[doi]

Optoelectronics Of Strongly Correlated Materials

Using scanning photocurrent microscopy method, we investigate optoelectronics of strongly correlated materials. Recently, we started working on low temperature optoelectronics of layered transition metal dichalcogenides.

Funding: TUBİTAK 1001 #214M109 & #118F061

Relevant Publications:

Thermal Conductivity Measurements in Nanosheets via Bolometric Effect
2D Materials, Accepted, 2020

Onur Çakıroğlu, Naveed Mehmood, Mert Miraç Çiçek, Aizimaiti Aikebaier, Hamid Reza Rasouli, Engin Durgun, T. Serkan Kasırga

[doi][arXiv]

Photocurrent generation in a metallic transition-metal dichalcogenide.
Phys. Rev. B, 97(19):195412, 2018.
Naveed Mehmood, Hamid Reza Rasouli, Onur Çakıroğlu and T. Serkan Kasırga.
[doi][BibTeX]

Photoresponse of a strongly correlated material determined by scanning photocurrent microscopy.
Nature Nanotechnology, 7:723-, 2012.
T. Serkan Kasırga, Dong Sun, Jae H. Park, Jim M. Coy, Zaiyao Fei, Xiaodong Xu and David H. Cobden.
[doi][BibTeX]