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   https://doi.org/10.1021/acsnano.1c03779  

   Zhang, Kunyan ; Guo, Yunfan ; Larson, Daniel T. ; Zhu, Ziyan ; Fang, Shiang ; Kaxiras, Efthimios ; Kong, Jing ; Huang, Shengxi ( September 2021 , ACS Nano)
2. Raman spectrum of Janus transition metal dichalcogenide monolayers WSSe and MoSSe

   https://doi.org/10.1103/PhysRevB.103.035414  

   Petrić, Marko M. ; Kremser, Malte ; Barbone, Matteo ; Qin, Ying ; Sayyad, Yasir ; Shen, Yuxia ; Tongay, Sefaattin ; Finley, Jonathan J. ; Botello-Méndez, Andrés R. ; Müller, Kai ( January 2021 , Physical Review B)

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3. Enhancement of van der Waals Interlayer Coupling through Polar Janus MoSSe

   https://doi.org/10.1021/jacs.0c07051  

   Zhang, Kunyan ; Guo, Yunfan ; Ji, Qingqing ; Lu, Ang-Yu ; Su, Cong ; Wang, Hua ; Puretzky, Alexander A. ; Geohegan, David B. ; Qian, Xiaofeng ; Fang, Shiang ; et al ( October 2020 , Journal of the American Chemical Society)

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4. Nonlinear Dispersion Relation and Out‐of‐Plane Second Harmonic Generation in MoSSe and WSSe Janus Monolayers

   https://doi.org/10.1002/adom.202300958  

   Petrić, Marko M. ; Villafañe, Viviana ; Herrmann, Paul ; Ben Mhenni, Amine ; Qin, Ying ; Sayyad, Yasir ; Shen, Yuxia ; Tongay, Sefaattin ; Müller, Kai ; Soavi, Giancarlo ; et al ( August 2023 , Advanced Optical Materials)

   Janus transition metal dichalcogenides are an emerging class of atomically thin materials with engineered broken mirror symmetry that gives rise to long‐lived dipolar excitons, Rashba splitting, and topologically protected solitons. They hold great promise as a versatile nonlinear optical platform due to their broadband harmonic generation tunability, ease of integration on photonic structures, and nonlinearities beyond the basal crystal plane. Here, second and third harmonic generation in MoSSe and WSSe Janus monolayers is studied. Polarization‐resolved spectroscopy is used to map the full second‐order susceptibility tensor of MoSSe, including its out‐of‐plane components. In addition, the effective third‐order susceptibility and the second‐order nonlinear dispersion close to exciton resonances for both MoSSe and WSSe are measured at room and cryogenic temperatures. This work sets a bedrock for understanding the nonlinear optical properties of Janus transition metal dichalcogenides and probing their use in the next‐generation on‐chip multifaceted photonic devices.

    

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   https://doi.org/10.1021/acs.inorgchem.1c03787  

   Ayer, Gyanendra B. ; Morrison, Gregory ; Smith, Mark D. ; Jacobsohn, Luiz G. ; zur Loye, Hans-Conrad ( February 2022 , Inorganic Chemistry)