In order to enable an iCal export link, your account needs to have an API key created. This key enables other applications to access data from within Indico even when you are neither using nor logged into the Indico system yourself with the link provided. Once created, you can manage your key at any time by going to 'My Profile' and looking under the tab entitled 'HTTP API'. Further information about HTTP API keys can be found in the Indico documentation.
Additionally to having an API key associated with your account, exporting private event information requires the usage of a persistent signature. This enables API URLs which do not expire after a few minutes so while the setting is active, anyone in possession of the link provided can access the information. Due to this, it is extremely important that you keep these links private and for your use only. If you think someone else may have acquired access to a link using this key in the future, you must immediately create a new key pair on the 'My Profile' page under the 'HTTP API' and update the iCalendar links afterwards.
Permanent link for public information only:
Permanent link for all public and protected information:
Fluctuations versus preformed pairing in cuprate superconductors: How high is high temperature superconductivity.
112:028 (Nordita South) ()
112:028 (Nordita South)
How high can the superconducting transition temperature be? This principle question has been discussed for many decades. The debate is fueled by an obscure border between superconducting and normal states in cuprate superconductors, caused by the presence of a normal-state pseudogap. The pseudogap bears some similarities with the superconducting gap, which has led to a suggestion that the pseudogap is a precursor of superconductivity. In this view the onset of Cooper pairing occurs at a temperature Tc0, significantly higher than Tc, but the macroscopic phase coherence is suppressed by strong fluctuations of the phase, but not the amplitude, of the order parameter. Such precursor correlations are different from ordinary superconducting fluctuations in a sense that the locus of ordinary fluctuations coincides with Tc and both amplitude and phase fluctuations occur simultaneously at T >Tc . Thus, in order to answer on the question posted above it is necessary to distinguish superconducting and non-superconducting contributions to the pseudogap in cuprates. In this presentation I will review our recent development of a novel angular-dependent magnetotunneling technique, which facilitates unambiguous separation of superconducting (supporting circulating screening currents) and nonsuperconducting (not supporting screening currents) contributions to the pseudogap phenomenon in layered Bi2Sr2CaCu2O8 cuprates. Our data indicate persistence of superconducting correlations at temperatures up to 1.5Tc in a form of both phase and amplitude fluctuations of the superconducting order parameter. However, despite a profound fluctuations region, only a small fraction of the pseudogap spectrum is caused by superconducting correlations, while the dominating part comes from a competing nonsuperconducting order, which does not support circulating orbital currents.