Sequence of Quantum Phase Transitions in Bi2Sr2CaCu2O8+delta Cuprates Revealed by In Situ Electrical Doping of One and the Same Sample
Number of Authors: 5
2016 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 116, no 6, 067001Article in journal (Refereed) Published
Our recently discovered electrical doping technique allows a broad-range variation of carrier concentration without changing the chemical composition. We show that it is possible to induce superconductivity in a nondoped insulating sample and to tune it reversibly all the way to an overdoped metallic state. This way, we can investigate the whole doping diagram of one and the same sample. Our study reveals two distinct critical points. The one at the overdoped side is associated with the onset of the pseudogap and with the metal-to-insulator transition in the c-axis transport. The other at optimal doping is associated with the appearance of a dressed electron energy. Our study confirms the existence of multiple phase transitions under the superconducting dome in cuprates.
Place, publisher, year, edition, pages
2016. Vol. 116, no 6, 067001
IdentifiersURN: urn:nbn:se:su:diva-127346DOI: 10.1103/PhysRevLett.116.067001ISI: 000369737100007OAI: oai:DiVA.org:su-127346DiVA: diva2:911252