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Structural, electronic, optical, and mechanical properties of cubic SnZrO3 and SnHfO3 have been studied under different hydrostatic pressures within the framework of density functional theory. A strong atomic interaction resulting from a considerable drop in the lattice parameter and bond length was observed. The Sn–O and Hf/Zr–O showed strong ionic and weak covalent characteristics, respectively, and the bond strengths are found to enhance under the applied pressure. Poisson’s ratio of these compounds also supports the bonding nature. The external pressure remarkably changed the optical absorption and conductivity of the materials to a higher value in the UV region of the solar spectrum and the direct bandgap of Sn(Zr/Hf)O3 significantly reduced, thereby enhancing the conductivity. Likewise, in other optical parameters, the elastic properties exhibited some noticeable changes: the stiffness, ductility, anisotropy, hardness, and machinability of these materials were significantly increased due to external pressure. All the findings indicate the high potentiality of these compounds to be used in optoelectronics and photovoltaic applications in the UV spectrum under hydrostatic pressure.

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Molecular-type QQsss¯ pentaquarks predicted by an extended hidden gauge symmetry approach

Wang,

Xiao,

Sun

et al. 2024

Phys. Rev. D

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In this work, we investigate the double-heavy molecular pentaquark states with the quark contents ccsss¯, bbsss¯, and bcsss¯ by using the coupled channel approach. The extended local hidden gauge Lagrangians are used to obtain the meson-baryon interactions by exchanging the vector mesons. We predict some candidates for the molecular states with the quantum numbers I(JP)=0(1/2−,3/2−,5/2−), whose binding energies are of the order of 20–30 MeV and whose widths are all less than 8 MeV. These predicted exotic double-heavy molecular pentaquark states may be accessible in future experiments such as LHCb. Published by the American Physical Society 2024

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Molecular Ωcc , Ωbb , and

Cited by 9 publications

References 109 publications

Three ways to decipher the nature of exotic hadrons: Multiplets, three-body hadronic molecules, and correlation functions

Three ways to decipher the nature of exotic hadrons: Multiplets, three-body hadronic molecules, and correlation functions

Pressure induced tuning of the physical properties of SnZrO3 and SnHfO3: A first principle study

Molecular-type QQsss¯ pentaquarks predicted by an extended hidden gauge symmetry approach

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