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1. Low-complexity eigenstates of a ν = 1/3 fractional quantum Hall system

   https://doi.org/10.1088/1751-8121/abca73  

   Nachtergaele, Bruno; Warzel, Simone; Young, Amanda (January 2021, Journal of Physics A: Mathematical and Theoretical)

   null (Ed.)
2. Thermal Conductivity of β-Phase Ga ₂ O ₃ and (Al _x Ga _{1– x} ) ₂ O ₃ Heteroepitaxial Thin Films

   https://doi.org/10.1021/acsami.1c08506  

   Song, Yiwen; Ranga, Praneeth; Zhang, Yingying; Feng, Zixuan; Huang, Hsien-Lien; Santia, Marco D.; Badescu, Stefan C.; Gonzalez-Valle, C. Ulises; Perez, Carlos; Ferri, Kevin; et al (August 2021, ACS Applied Materials & Interfaces)
3. Hyperbolic phonon polaritons with positive and negative phase velocities in suspended α -MoO ₃

   https://doi.org/10.1063/5.0085224  

   Shen, Jialiang; Zheng, Zhiren; Dinh, Thao; Wang, Chuanyu; Chen, Mingyuan; Chen, Pengyu; Ma, Qiong; Jarillo-Herrero, Pablo; Kang, Lixing; Dai, Siyuan (March 2022, Applied Physics Letters)

   Sample suspension is a valuable method to improve the mechanical, thermal, electronic, and optical properties of low-dimensional materials. In terms of confined light-matter waves—the polaritons, sample suspension can elongate the wavelength of polaritons with a positive phase velocity. Previous work demonstrates a wavelength elongation of ∼10% for hyperbolic phonon polaritons (HPPs) in uniaxial crystals of hexagonal boron nitride (hBN). In this work, we report the alteration of HPPs in biaxial α-phase molybdenum trioxide (α-MoO₃) by sample suspension. Our combined infrared nano-imaging experiments and electromagnetic theory reveal a wavelength elongation > 60% and a propagation length increase > 140%, due to the simultaneous wavelength elongation and dissipation elimination in the suspended specimen. We have also examined HPPs in α-MoO₃with a negative phase velocity. The sample suspension shortens the HPP wavelength and simultaneously reduces the dissipation due to the unique permittivity tensor. The HPPs with improved figures of merits in the suspended specimen may be developed for nano-polaritonic circuits, biochemical sensing, emission engineering, and energy transfer. 

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4. Band offsets of (100) β -(Al _x Ga _1−x ) ₂ O ₃ / β -Ga ₂ O ₃ heterointerfaces grown via MOCVD

   https://doi.org/10.1063/5.0031584  

   Bhuiyan, A F; Feng, Zixuan; Johnson, Jared M.; Huang, Hsien-Lien; Hwang, Jinwoo; Zhao, Hongping (December 2020, Applied Physics Letters)

   null (Ed.)
5. Longitudinal phonon plasmon mode coupling in β -Ga ₂ O ₃

   https://doi.org/10.1063/1.5089145  

   Schubert, Mathias; Mock, Alyssa; Korlacki, Rafał; Knight, Sean; Galazka, Zbigniew; Wagner, Günther; Wheeler, Virginia; Tadjer, Marko; Goto, Ken; Darakchieva, Vanya (March 2019, Applied Physics Letters)