Change search
ReferencesLink to record
Permanent link

Direct link
A universal explanation of tunneling conductance in exotic superconductors
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
Number of Authors: 2
2016 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 6, 31352Article in journal (Refereed) Published
Abstract [en]

A longstanding mystery in understanding cuprate superconductors is the inconsistency between the experimental data measured by scanning tunneling spectroscopy (STS) and angle-resolved photoemission spectroscopy (ARPES). In particular, the gap between prominent side peaks observed in STS is much bigger than the superconducting gap observed by ARPES measurements. Here, we reconcile the two experimental techniques by generalising a theory which was previously applied to zero-dimensional mesoscopic Kondo systems to strongly correlated two-dimensional (2D) exotic superconductors. We show that the side peaks observed in tunneling conductance measurements in all these materials have a universal origin: They are formed by coherence-mediated tunneling under bias and do not directly reflect the underlying density of states (DOS) of the sample. We obtain theoretical predictions of the tunneling conductance and the density of states of the sample simultaneously and show that for cuprate and pnictide superconductors, the extracted sample DOS is consistent with the superconducting gap measured by ARPES.

Place, publisher, year, edition, pages
2016. Vol. 6, 31352
National Category
Physical Sciences
URN: urn:nbn:se:su:diva-134434DOI: 10.1038/srep31352ISI: 000381183600001PubMedID: 27511315OAI: diva2:1034091
Available from: 2016-10-11 Created: 2016-10-06 Last updated: 2016-10-11Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textPubMed

Search in DiVA

By author/editor
Abergel, David S. L.
By organisation
Nordic Institute for Theoretical Physics (Nordita)
In the same journal
Scientific Reports
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

ReferencesLink to record
Permanent link

Direct link