Structural and vibrational study of cubic Sb<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>2</mml:mn></mml:msub></mml:math>O<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>3</mml:mn></mml:msub></mml:math>under high pressure

Pereira, Aledir Silveira; Gracia, Lourdes; Santamarı́a-Pérez, D.; Vilaplana, R.; Manjón, F. J.; Errandonea, Daniel; Nalin, Marcelo; Beltrán, Armando

doi:10.1103/physrevb.85.174108

Cited by 76 publications

(35 citation statements)

References 51 publications

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“…At ambient pressure, the unit cell volume we measured was 1383.5(1)Å 3 , agreeing well with previous data 7,20 . The volume as a function of pressure is presented in Fig.…”

Section: Resultssupporting

confidence: 81%

“…The different enthalpies from experimental volumes and theoretical volumes may explain why the first-order structural transition occurred at a lower pressure experimentally (15 to 20 GPa) than predicted (i.e. above 25 GPa) 20 . Also, there may lies a region where phase I and phase II coexist.…”

Section: Resultsmentioning

confidence: 99%

“…For phase I, we fit our data to a third-order BirchMurnaghan equation of state (BM-EOS) with fixed experimental V 0 = 86.47(1)Å 3 per formula, and obtained B 0 = 27.4 (7) GPa and B' = 7.7 (3), though the lack of data points in phase I may prevent the EOS determination of the three isostructural phases shown by the previous study 20 . The relatively large B' value indicates a large change in compressibility with pressure.…”

Section: Resultsmentioning

confidence: 99%

“…For α-Sb 2 O 3 , a high pressure study combing X-ray Diffraction (XRD) and Raman experiments with ab-initio calculations 20 reported several interesting results on it. It demonstrated two iso-structural transitions occurred at 3.5 GPa and 10 GPa.…”

Section: Introductionmentioning

confidence: 99%

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Structural transition and amorphization in compressedα−Sb2O3

et al. 2015

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Sb2O3-based materials are of broad interest in materials science and industry. High pressure study using diamond anvil cells shows promise in obtaining new crystal and electronic structures different from their pristine states. Here, we conducted in-situ angle dispersive synchrotron Xray diffraction and Raman spectroscopy experiments on α-Sb2O3 up to 50 GPa with neon as the pressure transmitting medium. A first-order structural transition was observed in between 15 to 20 GPa, where the cubic phase I gradually transformed into a layered tetragonal phase II through structural distortion and symmetry breaking. To explain the dramatic changes in sample color and transparency, we performed first-principles calculations to track the evolution of its density of states and electronic structure under pressure. At higher pressure, a sluggish amorphization was observed. Our results highlight the structural connections among the sesquioxides, where the lone electron pair plays an important role in determining the local structures.

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“…At ambient pressure, the unit cell volume we measured was 1383.5(1)Å 3 , agreeing well with previous data 7,20 . The volume as a function of pressure is presented in Fig.…”

Section: Resultssupporting

confidence: 81%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Structural transition and amorphization in compressedα−Sb2O3

et al. 2015

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“…For comparison purposes, the EOS parameters for isostructural In 2 O 3 are also included in Table II. [41][42][43] 45 and monoclinic a-Bi 2 O 3 (S.G.: P2 1 /c, No. 14, Z ¼ 4).…”

Section: Resultsmentioning

confidence: 99%

High-pressure structural and elastic properties of Tl2O3

Gomis

Santamarı́a-Pérez

Ruiz‐Fuertes

et al. 2014

Journal of Applied Physics

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High pressure transport, structural, and first principles investigations on the fluorite structured intermetallic, PtAl2 J. Appl. Phys. 111, 013507 (2012) The structural properties of Thallium (III) oxide (Tl 2 O 3 ) have been studied both experimentally and theoretically under compression at room temperature. X-ray powder diffraction measurements up to 37.7 GPa have been complemented with ab initio total-energy calculations. The equation of state of Tl 2 O 3 has been determined and compared to related compounds. It has been found experimentally that Tl 2 O 3 remains in its initial cubic bixbyite-type structure up to 22.0 GPa. At this pressure, the onset of amorphization is observed, being the sample fully amorphous at 25.2 GPa. The sample retains the amorphous state after pressure release. To understand the pressure-induced amorphization process, we have studied theoretically the possible high-pressure phases of Tl 2 O 3 . Although a phase transition is theoretically predicted at 5.8 GPa to the orthorhombic Rh 2 O 3 -II-type structure and at 24.2 GPa to the orthorhombic a-Gd 2 S 3 -type structure, neither of these phases were observed experimentally, probably due to the hindrance of the pressure-driven phase transitions at room temperature. The theoretical study of the elastic behavior of the cubic bixbyite-type structure at high-pressure shows that amorphization above 22 GPa at room temperature might be caused by the mechanical instability of the cubic bixbyite-type structure which is theoretically predicted above 23.5 GPa. V C 2014 AIP Publishing LLC. [http://dx

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Scalable Van der Waals Encapsulation by Inorganic Molecular Crystals

et al. 2022

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Encapsulation is critical for devices to guarantee their stability and reliability. It becomes an even more essential requirement for devices based on 2D materials with atomic thinness and far inferior stability compared to their bulk counterparts. Here a general van der Waals (vdW) encapsulation method for 2D materials using Sb2O3 layer of inorganic molecular crystal fabricated via thermal evaporation deposition is reported. It is demonstrated that such a scalable encapsulation method not only maintains the intrinsic properties of typical air‐susceptible 2D materials due to their vdW interactions but also remarkably improves their environmental stability. Specifically, the encapsulated black phosphorus (BP) exhibits greatly enhanced structural stability of over 80 days and more sustaining‐electrical properties of 19 days, while the bare BP undergoes degradation within hours. Moreover, the encapsulation layer can be facilely removed by sublimation in vacuum without damaging the underlying materials. This scalable encapsulation method shows a promising pathway to effectively enhance the environmental stability of 2D materials, which may further boost their practical application in novel (opto)electronic devices.

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Structural and vibrational study of cubic Sb2O3under high pressure

Cited by 76 publications

References 51 publications

Structural transition and amorphization in compressedα−Sb2O3

Structural transition and amorphization in compressedα−Sb2O3

High-pressure structural and elastic properties of Tl2O3

Scalable Van der Waals Encapsulation by Inorganic Molecular Crystals

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