Details

Autor(en) / Beteiligte

• Prakash, Om
• Kumar, Anil
• Thamizhavel, A.
• Ramakrishnan, S.

Titel

Evidence for bulk superconductivity in pure bismuth single crystals at ambient pressure

Ist Teil von

• Science (American Association for the Advancement of Science), 2017-01, Vol.355 (6320), p.52-55

Ort / Verlag

United States: American Association for the Advancement of Science

Erscheinungsjahr

2017

Link zum Volltext

Quelle

American Association for the Advancement of Science

Beschreibungen/Notizen

• At ambient pressure, bulk rhombohedral bismuth is a semimetal that remains in the normal state down to at least 10 millikelvin. Superconductivity in bulk bismuth is thought to be unlikely because of the extremely low carrier density. We observed bulk superconductivity in pure bismuth single crystals below 0.53 millikelvin at ambient pressure, with an estimated critical magnetic field of 5.2 microteslas at 0 kelvin. Superconductivity in bismuth cannot be explained by the conventional Bardeen-Cooper-Schrieffer theory because its adiabatic approximation does not hold true for bismuth. Future theoretical work will be needed to understand superconductivity in the nonadiabatic limit in systems with low carrier densities and unusual band structures, such as bismuth.