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The Center for Materials Research

Welcome to the web sites of the Center for Materials Research

Welcome to the web sites of the Center for Materials Research!

The Center for Materials Research is an interdisciplinary university research center at JLU.
It is dedicated to the implementation of joint research projects, the support of the study courses in materials science and it promotes scientific qualification in materials research.

An overview of our scientific team is available under 
Team & Topics.

The center provides the participating research groups with central experimental resources in its
Method Platforms.

The ZfM coordinates the JLU research profile area ("area of
Material and Energy (focus: storage materials). 

Further information on our tasks can be found under
About us.


Picture of the Month - September 2023

MBE growth of cubic InxGa1-xN over the entire GaN/InN composition range

The increasing demand for efficient lighting sources and higher bandwidth communication mandates developing robust and reliable semiconductor materials suitable for large-scale industrial fabrication. Cubic InxGa1-xN are prime candidate materials for such optoelectronic applications. They promise to cover a vast range of emission wavelengths yet lack the internal piezoelectric fields native to the hexagonal nitrides. However, the large discrepancy in interatomic spacing and growth temperatures of GaN and InN hinder the heteroepitaxial growth of the intrinsically metastable c-InxGa1-xN over the whole composition range.

The perceived miscibility gap of c-GaN and c-InN is overcome by sophisticated strain management in the MBE growth of cubic c-InxGa1−xN films on c-GaN/AlN/3C-SiC/Si templates. Thorough characterization using HRXRD, Raman spectroscopy, and EDX confirms a singular, partially strained, cubic crystal phase. HR-STEM images reveal a modified CuPt-type ordering in c-InxGa1−xN when x ≈ 0.5, which is further supported by the FWHM of the emission line width. Low-temperature photoluminescence demonstrates the tunability of the emission energy from the near-ultraviolet to the near-infrared with a bowing coefficient of 2.4 eV.

Publication: Mario F. Zscherp, Silas A. Jentsch, Marius J. Müller, Vitalii Lider, Celina Becker, Limei Chen, Mario Littmann, Falco Meier, Andreas Beyer, Detlev M. Hofmann, Donat J. As, Peter J. Klar, Kerstin Volz, Sangam Chatterjee, Jörg Schörmann “Overcoming the Miscibility Gap of GaN/InN in MBE Growth of Cubic InxGa1−xN”, ACS Appl. Mater. Interfaces, 15, 33, 39513-39522 (2023). DOI: 10.1021/acsami.3c06319

This picture was submitted by Mario Zscherp, group of Prof. Dr. Sangam Chatterjee.

Further insights into the research activities of the ZfM groups can be found in the Gallery.


Bericht 2020-2021