We report a study of the structural phase transitions induced by pressure in bulk black phosphorus by using both synchrotron x-ray diffraction for pressures up to 12.2 GPa and Raman spectroscopy up to 18.2 GPa. Very recently black phosphorus attracted large attention because of the unique properties of few-layers samples (phosphorene), but some basic questions are still open in the case of the bulk system. As concerning the presence of a Raman spectrum above 10 GPa, which should not be observed in an elemental simple cubic system, we propose a new explanation by attributing a key role to the non-hydrostatic conditions occurring in Raman experiments. Finally, a combined analysis of Raman and XRD data allowed us to obtain quantitative information on presence and extent of coexistences between different structural phases from similar to 5 up to similar to 15 GPa. This information can have an important role in theoretical studies on pressure-induced structural and electronic phase transitions in black phosphorus.

Coexistence of pressure-induced structural phases in bulk black phosphorus: a combined x-ray diffraction and Raman study up to 18 GPa / Joseph, B; Caramazza, S; Capitani, F; Clarté, T; Ripanti, F; Lotti, P; Lausi, A; Di Castro, D; Postorino, P; Dore, P. - In: JOURNAL OF PHYSICS. CONDENSED MATTER. - ISSN 0953-8984. - 30:49(2018), p. 494002. [10.1088/1361-648X/aaebe5]

Coexistence of pressure-induced structural phases in bulk black phosphorus: a combined x-ray diffraction and Raman study up to 18 GPa

Caramazza, S;Ripanti, F;Postorino, P;Dore, P
2018

Abstract

We report a study of the structural phase transitions induced by pressure in bulk black phosphorus by using both synchrotron x-ray diffraction for pressures up to 12.2 GPa and Raman spectroscopy up to 18.2 GPa. Very recently black phosphorus attracted large attention because of the unique properties of few-layers samples (phosphorene), but some basic questions are still open in the case of the bulk system. As concerning the presence of a Raman spectrum above 10 GPa, which should not be observed in an elemental simple cubic system, we propose a new explanation by attributing a key role to the non-hydrostatic conditions occurring in Raman experiments. Finally, a combined analysis of Raman and XRD data allowed us to obtain quantitative information on presence and extent of coexistences between different structural phases from similar to 5 up to similar to 15 GPa. This information can have an important role in theoretical studies on pressure-induced structural and electronic phase transitions in black phosphorus.
black phosphorus; high pressure; phase transitions; Raman spectroscopy; x-ray diffraction
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Coexistence of pressure-induced structural phases in bulk black phosphorus: a combined x-ray diffraction and Raman study up to 18 GPa / Joseph, B; Caramazza, S; Capitani, F; Clarté, T; Ripanti, F; Lotti, P; Lausi, A; Di Castro, D; Postorino, P; Dore, P. - In: JOURNAL OF PHYSICS. CONDENSED MATTER. - ISSN 0953-8984. - 30:49(2018), p. 494002. [10.1088/1361-648X/aaebe5]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1277578
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