Pressure-induced phase transition of Bi<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>Te<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>to a bcc structure

Einaga, Mari; Ohmura, Ayako; Nakayama, Atsuko; Ishikawa, Fumihiro; Yamada, Yuh; Nakano, Satoshi

doi:10.1103/physrevb.83.092102

Cited by 83 publications

(65 citation statements)

References 28 publications

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“…The phase transition routines are in good accordance with the recent reports on the corresponding bulk Bi 2 Te 3 and Sb 2 Te 3 materials. 33,34,38 The ambient peak of (015) crystal plane centered at 2θ of ∼11.02°r emained up to 9.2 GPa and even existed as the pressure was further increased to 10.9 GPa, which is clearly marked with the arrow. However, new Bragg peaks denoted by open asterisks emerged as soon as the loading pressure reached 9.2 GPa, signifying the onset of initial structural phase transition to a monoclinic structured Bi 2 Te 3 (phase II).…”

Section: ■ Experimental Sectionmentioning

confidence: 93%

“…26,27 Despite the special interest in it, response of Bi 2 Te 3 to high pressure has been yet rarely explored. 28−32 Recently, Bi−Te subtutional nonmetallic alloy has been successfully achieved at pressure above 25 GPa, 33,34 making high pressure a highly attractive route to synthesize novel alloys. Otherwise, best endeavoring to satisfy energy conservation remains a major concern to date, hence encouraging us to seek how to lower the applied pressure for the preparation of nonmetallic element alloys.…”

Section: ■ Introductionmentioning

confidence: 99%

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Pressure-Induced Reversible Phase Transformation in Nanostructured Bi₂Te₃ with Reduced Transition Pressure

et al. 2015

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High-pressure research on nanostructured materials has been of considerable interest owing to the quantum confinement effect and intrinsic defects in the nanocrystals. Here, we report a pressure-induced reversible structural phase transition in nanostructured Bi 2 Te 3 hierarchical architectures (HAs) that were prepared via a facile solution-phase method. Therein, distinct phases I−IV by respectively adopting crystal structures of rhombohedral (I), monoclinic (II, III), and cubic (IV) were experimentally identified with increasing pressure up to 20.2 GPa in a diamond anvil cell (DAC). It is worthwhile to notice that nanostructured Bi 2 Te 3 HAs ultimately evolved into a fascinating Bi−Te substitutional nonmetallic alloy at pressure even as low as 15.0 GPa, approximately 10 GPa lower than that of the corresponding bulk counterpart. The synergistic effect involving large volume collapse and the unique one-dimensional nanostructures with intrinsic antisite defects was proposed to be responsible for the reduction of transition pressure that is contrary to the general model for most nanomaterials. Our findings may pave a potential pathway for developing future multifunctional nanoalloys that are composed of nonmetallic elements. ■ INTRODUCTIONAlloys have been anticipated to be widely utilized in engineering and industry owing to their extraordinary properties, such as much stronger hardness and toughness, depressed electric and thermal conductivity, and lower melting point than each separated constituent alone. 1,2 These unique characteristics of an alloy are able to render people manufacture the target material with desired properties for a given practical application. However, most alloys are composed of metal elements; thus, searching for other alternatives of new and enhanced functional alloys as well as their prepared strategy is of great interest and remains challenging.Applications of high pressure have proven to be a powerful tool in tailoring the material's properties, especially since the development in the 1950s of the diamond anvil cell (DAC), which made it possible to generate pressures even above 100 GPa. 3−6 Intriguingly, nanomaterials subjected to high-pressure conditions can greatly increase opportunities of exploring novel physical phenomena because of the quantum confinement effect and intrinsic defects yielded by the stark decrease in size. 7−13 In this respect, Tolbert and Alivisatos, as pioneers in 1994, systematically investigated in situ high-pressure structural phase transition of monodispersed CdSe nanoparticles by applying DAC apparatus. 14 Inspired by the size effect of nanomaterials, Wang et al. have recently reported a critical sizedependent amorphization of nanoscale Y 2 O 3 particles at high pressure. 15 Meanwhile, Fan's group further developed high pressure as a potential means for morphology regulation of noble metal nanocrystals. 16−18 Our group has also made a progress in high-pressure nanomaterial studies over the different stabilities and phase transition routines for nanosized YP...

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Section: ■ Experimental Sectionmentioning

confidence: 93%

Section: ■ Introductionmentioning

confidence: 99%

Pressure-Induced Reversible Phase Transformation in Nanostructured Bi₂Te₃ with Reduced Transition Pressure

et al. 2015

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“…12 The study of physical properties in these materials under compression is receiving increasing attention especially due to continuous experimental and theoretical developments. [13][14][15][16][17][18][19][20][21][22] The high-pressure phases II, III, and IV of Bi 2 Te 3 were recognized by x-ray diffraction experiments with the additional help from the particle swarm optimization algorithm. [13][14][15] The same type of phases was observed in Bi 2 Se 3 and Sb 2 Te 3 by the experiment group of Vilaplana et al 16,17 Here, the phase transition from the α phase I to the β phase II was between the rhombohedral R3m crystal structure to the monoclinic C2/m structure at 10 GPa for Bi 2 Se 3 , 7.4 GPa for Bi 2 Te 3 , and 7.7 GPa for Sb 2 Te 3 .…”

Section: Introductionmentioning

confidence: 99%

Lattice dynamics and chemical bonding in Sb2Te3 from first-principles calculations

Wang

Souvatzis

Eriksson

et al. 2015

The Journal of Chemical Physics

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Pressure effects on the lattice dynamics and the chemical bonding of the three-dimensional topological insulator, Sb2Te3, have been studied from a first-principles perspective in its rhombohedral phase. Where it is possible to compare, theory agrees with most of the measured phonon dispersions. We find that the inclusion of relativistic effects, in terms of the spin-orbit interaction, affects the vibrational features to some extend and creates large fluctuations on phonon density of state in high frequency zone. By investigations of structure and electronic structure, we analyze in detail the semiconductor to metal transition at ∼2 GPa followed by an electronic topological transition at a pressure of ∼4.25 GPa.

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“…The application of pressure has recently been reported to turn the topological insulator Bi 2 Te 3 into a superconducting state18. Isostructural to Bi 2 Te 3 and Bi 2 Se 3 19202122232425, Sb 2 Te 3 is another well-studied three-dimensional topological insulator. In this study, we report the discovery of superconductivity in Sb 2 Te 3 single crystals induced via pressure.…”

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confidence: 99%

Superconductivity in Topological Insulator Sb2Te3 Induced by Pressure

Zhang

Kong

Zhang

et al. 2013

Sci Rep

141

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Topological superconductivity is one of most fascinating properties of topological quantum matters that was theoretically proposed and can support Majorana Fermions at the edge state. Superconductivity was previously realized in a Cu-intercalated Bi2Se3 topological compound or a Bi2Te3 topological compound at high pressure. Here we report the discovery of superconductivity in the topological compound Sb2Te3 when pressure was applied. The crystal structure analysis results reveal that superconductivity at a low-pressure range occurs at the ambient phase. The Hall coefficient measurements indicate the change of p-type carriers at a low-pressure range within the ambient phase, into n-type at higher pressures, showing intimate relation to superconducting transition temperature. The first principle calculations based on experimental measurements of the crystal lattice show that Sb2Te3 retains its Dirac surface states within the low-pressure ambient phase where superconductivity was observed, which indicates a strong relationship between superconductivity and topology nature.

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Pressure-induced phase transition of Bi2Te3to a bcc structure

Cited by 83 publications

References 28 publications

Pressure-Induced Reversible Phase Transformation in Nanostructured Bi₂Te₃ with Reduced Transition Pressure

Pressure-Induced Reversible Phase Transformation in Nanostructured Bi₂Te₃ with Reduced Transition Pressure

Lattice dynamics and chemical bonding in Sb2Te3 from first-principles calculations

Superconductivity in Topological Insulator Sb2Te3 Induced by Pressure

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Pressure-induced phase transition of Bi2Te3to a bcc structure

Cited by 83 publications

References 28 publications

Pressure-Induced Reversible Phase Transformation in Nanostructured Bi2Te3 with Reduced Transition Pressure

Pressure-Induced Reversible Phase Transformation in Nanostructured Bi2Te3 with Reduced Transition Pressure

Lattice dynamics and chemical bonding in Sb2Te3 from first-principles calculations

Superconductivity in Topological Insulator Sb2Te3 Induced by Pressure

Contact Info

Product

Resources

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Pressure-Induced Reversible Phase Transformation in Nanostructured Bi₂Te₃ with Reduced Transition Pressure

Pressure-Induced Reversible Phase Transformation in Nanostructured Bi₂Te₃ with Reduced Transition Pressure