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Interplay between structure and superconductivity: Metastable phases of phosphorus under pressure

Flores-Livas, Jose A. and Sanna, Antonio and Drozdov, Alexander P. and Boeri, Lilia and Profeta, Gianni and Eremets, Mikhail and Goedecker, Stefan. (2017) Interplay between structure and superconductivity: Metastable phases of phosphorus under pressure. Physical Review Materials, 1 (2). 024802.

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Official URL: http://edoc.unibas.ch/58472/

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Abstract

Pressure-induced superconductivity and structural phase transitions in phosphorus (P) are studied by resistivity measurements under pressures up to 170 GPa and by fully ab initio crystal structure exploration and superconductivity calculations up to 350 GPa. Two distinct superconducting transition temperature (TC) vs pressure (P) trends at low pressure have been reported more than 30 years ago, and we are able to devise a consistent explanation founded on thermodynamically metastable phases of black phosphorus. Our experimental and theoretical results form a single, consistent picture which not only provides a clear understanding of elemental P under pressure but also sheds light on the longstanding and unsolved anomalous superconductivity trends. Moreover, at higher pressures we predict a similar scenario of multiple metastable structures which coexist beyond their thermodynamical stability range. We observe that all the metastable structures systematically exhibit larger transition temperatures than the ground-state structures, indicating that the exploration of metastable phases represents a promising route to design materials with improved superconducting properties.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Physik (Goedecker)
UniBasel Contributors:Goedecker, Stefan
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
e-ISSN:2475-9953
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
Identification Number:
Last Modified:25 Jan 2018 09:23
Deposited On:17 Jan 2018 11:04

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