tag:blogger.com,1999:blog-34480619.post1028264239751142834..comments2024-03-11T13:47:03.621-05:00Comments on Physics and Physicists: High-Tc Superconductors Are Very KinkyZapperZhttp://www.blogger.com/profile/15861398273820851809noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-34480619.post-58859221418029681042008-12-24T07:39:00.000-06:002008-12-24T07:39:00.000-06:00Hi Zz,Just wanted to point out that optical spectr...Hi Zz,<BR/><BR/>Just wanted to point out that optical spectroscopy also has some things to say about this story. Of course, I am going to shamelessly advertise my own work here. I have a preprint out [1] (submitted to, but not yet accepted by, PRL) that analyzes optical spectra and finds evidence for coupling to bosonic modes at the same energies as the ARPES experiments. It may shed some new light (aha ha) on the controversy regarding phonon vs. magnetic origin. In fact it is my believe that the electrons couple strongly to phonons. If one further realizes that the spin fluctuations are essentially the same electrons, it seems natural to assume that the phonons and spin fluctuations also interact. Recently the Stanford group has started to look into this issue, and they claim that properties of strongly underdoped materials can be described by the so-called Holstein-tJ model [2]. In the coming week I will submit a new paper in which we analyze both ARPES and optical spectra obtained on the same crystals of Bi2201. We find very good agreement between the two techniques. <BR/><BR/>One thing most people probably do not realize is that all this is based around the notion of a Fermi liquid. It tells us something important: strong correlations may be less important than strong interactions in these materials. <BR/>This goes against the mainstream line of thought of the past 20 years.<BR/><BR/>Cheers, <BR/>Heumpje<BR/>[1] E. van Heumen et al. arxiv: 0807.1730 <BR/>[2] A.S. Mishchenko et al.arxiv: 0804.0479Heumpjehttps://www.blogger.com/profile/01993462463863993238noreply@blogger.com