Persistent electrical doping of Bi2Sr2CaCu2O8+x mesa structures

Details Persistent electrical doping of Bi2Sr2CaCu2O8+x mesa structures Persistent electrical doping of Bi2Sr2CaCu2O8+x mesa structures

2012-02-08

arxiv.org/abs/1202.1665v1

Physics

Condensed Matter

Superconductivity

Scientific paper

Application of a significantly large bias voltage to small Bi2Sr2CaCu2O8+x mesa structures leads to persistent doping of the mesas. Here we employ this effect for analysis of the doping dependence of the electronic spectra of Bi-2212 single crystals by means of intrinsic tunneling spectroscopy. We are able to controllably and reversibly change the doping state of the same single crystal from underdoped to overdoped state, without changing its chemical composition. It is observed that such physical doping is affecting superconductivity in Bi-2212 similar to chemical doping by oxygen impurities: with overdoping the critical temperature and the superconducting gap decrease, with underdoping the c-axis critical current rapidly decreases due to progressively more incoherent interlayer tunneling and the pseudogap rapidly increases, indicative for the presence of the critical doping point. We distinguish two main mechanisms of persistent electric doping: (i) even in voltage contribution, attributed to a charge transfer effect, and (ii) odd in voltage contribution, attributed to reordering of oxygen impurities.

Affiliated with

Also associated with

No associations

Rating

Persistent electrical doping of Bi2Sr2CaCu2O8+x mesa structures does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Persistent electrical doping of Bi2Sr2CaCu2O8+x mesa structures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Persistent electrical doping of Bi2Sr2CaCu2O8+x mesa structures will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-64455