tag:blogger.com,1999:blog-5439168179960787195.post823413561502339056..comments2024-03-28T17:13:01.117+10:00Comments on Condensed concepts: A signature of a "two fluid" picture for a strongly correlated electron systemRoss H. McKenziehttp://www.blogger.com/profile/09950455939572097456noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-5439168179960787195.post-81493202409772599072012-01-06T08:12:39.730+10:002012-01-06T08:12:39.730+10:00The problem with this dissertation is that somethi...The problem with this dissertation is that something is fluctuating. That implies two phases or states at the very least. In this case, it is the bath coupled to the solute. A microscopic examination of the solute bath composite would reveal the details of the coupling, but certainly it must be there.<br /><br />In the case of the high temperature superconductors, at the very least there is a microscopic phase separation, which implies two microscopic competing domains, and percolative behavior. This has recently been demonstrated even for the doped bismuth oxides.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5439168179960787195.post-18884123299872536122012-01-03T07:05:29.532+10:002012-01-03T07:05:29.532+10:00While it is true that isosbestic points and accomp...While it is true that isosbestic points and accompanying van't Hoff scaling can be a marker of two state behavior, a much more general interpretation admits that any continuous equilibrium distribution might display this behavior (a result that I have found very interesting). <br /><br />This is written about from the perspective of a physical chemist here:<br />http://www.cchem.berkeley.edu/plggrp/papers/PLG2005f.pdfstat-mecherhttps://www.blogger.com/profile/09861599041903336895noreply@blogger.comtag:blogger.com,1999:blog-5439168179960787195.post-14316613283090973712011-12-24T08:26:06.292+10:002011-12-24T08:26:06.292+10:00Sure there is spectral weight transfer, but why sh...Sure there is spectral weight transfer, but why should there be an exact isobetic point? That seems to be what is implied in this work. If the crossing is not exact (or is becoming exact in the limit of zero temperature), then it is a bit of a red herring and of limited utility. Better to just talk of spectral weight transfer...Peter Armitagehttps://www.blogger.com/profile/11567089164372083820noreply@blogger.comtag:blogger.com,1999:blog-5439168179960787195.post-2011400279613612112011-12-22T00:26:37.793+10:002011-12-22T00:26:37.793+10:00With respect to high Tc superconductivity, this sh...With respect to high Tc superconductivity, this should give you some insight on how the enormous (optical) pairing energies are manifested (or alternatively - hidden) from the low energy excitations of the system as it undergoes a BCS to BEC transition (or alternatively a BEC to BCS transition). The specific mechanism of spectral weight transfer is the interesting question, one that Philips ascribes to 'Mottness', but there may be others.<br /><br />My pet theory is field induced superconductor to insulator transitions at half filling, something that most would claim doesn't exist.Anonymousnoreply@blogger.com