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Pressure-induced superconductivity in the giant Rashba system BiTeI.
- Source :
-
Journal of physics. Condensed matter : an Institute of Physics journal [J Phys Condens Matter] 2017 Mar 08; Vol. 29 (9), pp. 09LT02. Date of Electronic Publication: 2016 Dec 22. - Publication Year :
- 2017
-
Abstract
- At ambient pressure, BiTeI exhibits a giant Rashba splitting of the bulk electronic bands. At low pressures, BiTeI undergoes a transition from trivial insulator to topological insulator. At still higher pressures, two structural transitions are known to occur. We have carried out a series of electrical resistivity and AC magnetic susceptibility measurements on BiTeI at pressure up to ∼40 GPa in an effort to characterize the properties of the high-pressure phases. A previous calculation found that the high-pressure orthorhombic P4/nmm structure BiTeI is a metal. We find that this structure is superconducting with T <subscript>c</subscript> values as high as 6 K. AC magnetic susceptibility measurements support the bulk nature of the superconductivity. Using electronic structure and phonon calculations, we compute T <subscript>c</subscript> and find that our data is consistent with phonon-mediated superconductivity.
Details
- Language :
- English
- ISSN :
- 1361-648X
- Volume :
- 29
- Issue :
- 9
- Database :
- MEDLINE
- Journal :
- Journal of physics. Condensed matter : an Institute of Physics journal
- Publication Type :
- Academic Journal
- Accession number :
- 28004645
- Full Text :
- https://doi.org/10.1088/1361-648X/aa5567