Anomalous Polar Textures in Quasi-1D Chalcogenides and Heterostructures – A DoD Multidisciplinary University Research Initiative (MURI) sponsored by ARO

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The goal of this MURI project is to marry the functionalities arising from dipolar textures to optically and electrically active electronic materials such as semiconductors and electronic phase change materials. This will be studied in two platforms: (a) artificial heterostructures of perovskite ferroelectric oxides and chalcogenide electronic materials (perovskite and layered), and (b) quasi-1D hexagonal chalcogenides with intrinsic polar textures. We anticipate that these unique textures and chiral properties can lead to emergent electronic and photonic properties for applications in sensing, communication, and computing.

Principal Investigator: Jayakanth Ravichandran (USC)

Co-Principal Investigators: Nuh Gedik (MIT), Rohan Mishra (WUStL), Abhay Pasupathy (Columbia), Han Wang (USC), and Di Xiao (UW)

Funding Agency: Army Research Office

Program Managers: Pani Varanasi (ARO), and Marc Ulrich (ARO)

10/21 Chong presented a talk on Electric Interfacial Dzyaloshinskii–Moriya interaction at the October MURI monthly meeting.

10/19 Nuh Gedik and Di Xiao are elected APS Fellows. Congratulations!

09/17 Nan presented a talk on electrical switching behavior of BaTiS₃ at the September MURI monthly meeting.

08/10 We had our first annual review of our MURI program at USC. The meeting was a great opportunity for the whole team and the program manager to get together in person for the first time since the kick-off and exchange the recent developments in the program!

07/15 Batyr presented a talk on experimental efforts of probing charity and Raman optical activity (ROA) in BaTiS₃ at the June MURI monthly meeting.

M. Surendran, B. Zhao, G. Ren, S. Singh, A. Avishai, H. Chen, J-K. Han, M. Kawasaki, R. Mishra and J. Ravichandran, “Quasi-epitaxial growth of BaTiS₃ films”, Journal of Materials Research (2022) DOI: 10.1557/s43578-022-00776-y.

K. Ye, B. Zhao, B. Diroll, J. Ravichandran and R. Jaramillo, “Time-Resolved Photoluminescence Studies of Perovskite Chalcogenides”, Faraday Discussions (2022) DOI: 10.1039/D2FD00047D.

B. Zhao, M. S. B. Hoque, G. W. Jung, H. Mei, S. Singh, G. Ren, M. Milich, Q. Zhao, N. Wang, H. Chen, S. Niu, S-J. Lee, C-T. Kuo, J-S. Lee, J. A. Tomko, H. Wang, M. Kats, R. Mishra, P. E. Hopkins, J. Ravichandran, “Orientation Controlled Anisotropy in Single Crystals of Quasi-1D BaTiS₃”, Chemistry of Materials, 34, 5680–5689 (2022).