tag:blogger.com,1999:blog-13869903.post5837219311165914313..comments2024-03-29T02:45:10.096-05:00Comments on nanoscale views: What is a "bad metal"? What is a "strange metal"?Douglas Natelsonhttp://www.blogger.com/profile/13340091255404229559noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-13869903.post-11104565469358673782023-08-31T17:25:35.357-05:002023-08-31T17:25:35.357-05:00anything to do with Rydberg atoms?anything to do with Rydberg atoms?alysdexiahttps://www.blogger.com/profile/00950245185187434585noreply@blogger.comtag:blogger.com,1999:blog-13869903.post-85976060247599519302018-01-26T05:06:46.308-06:002018-01-26T05:06:46.308-06:00Dear Douglas,
I very much enjoy reading your post...Dear Douglas,<br /><br />I very much enjoy reading your posts, please keep up the great work!<br />In colloquia I very often see a picture of the "hole-doped cuprate phase diagram" (e.g. google images first hit) pass by. This includes the strange metal phase. I am very happy to finally hear a clear explanation of you of what it means to be a strange metal. However, I have never really understood all the features and phases in the diagram and why it behaves in the way presented on the hole doping and temperature.<br /><br />Hence my question: do you know of any good sources where this phase diagram is explained extensively? Or perhaps you could have a go at it in a blog post?<br /><br />Regards,<br /><br />Erik [condensed-matter graduate student] Erikhttps://www.blogger.com/profile/14629571445007334997noreply@blogger.comtag:blogger.com,1999:blog-13869903.post-75499581094498582262015-09-23T00:52:52.933-05:002015-09-23T00:52:52.933-05:00Bad metal and strange metal concepts are explained...Bad metal and strange metal concepts are explained so well and such understandable way. The questions raised at the end of the post were really interesting. I would really like to seek answers for them.Hastelloy C22http://www.regentsteel.com/hastelloy-c22.htmlnoreply@blogger.comtag:blogger.com,1999:blog-13869903.post-14756355052098260002014-09-24T13:12:38.744-05:002014-09-24T13:12:38.744-05:00Hi, Ross - As you inferred, I've been thinking...Hi, Ross - As you inferred, I've been thinking about experiments in this area. I'll be in touch via email to discuss this, if you're interested.Douglas Natelsonhttps://www.blogger.com/profile/13340091255404229559noreply@blogger.comtag:blogger.com,1999:blog-13869903.post-41910087507516566932014-09-23T23:10:28.374-05:002014-09-23T23:10:28.374-05:00Hi Doug,
Thanks for the interest.
Your questions ...Hi Doug,<br /><br />Thanks for the interest.<br />Your questions are not dumb, but profound and difficult.<br />Calculating bulk equilibrium (including linear response) properties such as conductivity are "straight-forward" in DMFT. It involves a self-consistent solution of an Anderson impurity model, i.e. it is of comparable difficulty to the Kondo problem in a quantum dot.<br />I presume you want shot noise in an out-of-equilibrium problem (i.e. non-linear in voltage) and mesoscopic situation. This has not been explicitly been done before with DMFT, but is certainly not beyond the realm of possibility. People have done out of equilibrium DMFT and DMFT for nano structures.<br />Why do you ask? Are these experiments you or others may do soon?Ross H. McKenziehttps://www.blogger.com/profile/09950455939572097456noreply@blogger.comtag:blogger.com,1999:blog-13869903.post-28482834687845998942014-09-22T11:05:31.805-05:002014-09-22T11:05:31.805-05:00Thanks for the supportive words, everyone. Ross, ...Thanks for the supportive words, everyone. Ross, I had just seen the preprint on the arxiv and placed it in my queue to read. I'm curious about your DMFT approach in the single-band Hubbard model. Can you calculate other quantities, specifically the shot noise in some model configuration? Or the shot noise at the interface between a boring metal (nearly free electron gas) and such a Hubbard model? Please pardon if these are dumb questions, as I know little about how these calculations are performed numerically.Douglas Natelsonhttps://www.blogger.com/profile/13340091255404229559noreply@blogger.comtag:blogger.com,1999:blog-13869903.post-72529006835410903112014-09-22T03:24:01.117-05:002014-09-22T03:24:01.117-05:00Thanks for this post. Seems like there’s always so...Thanks for this post. Seems like there’s always something new I learn even after being in the field for 25 years...c.b.http://www.cocoon-bobbin-oil.comnoreply@blogger.comtag:blogger.com,1999:blog-13869903.post-20923039288588038422014-09-22T01:23:11.970-05:002014-09-22T01:23:11.970-05:00Hi Doug,
Thanks for posting about bad metals. The...Hi Doug,<br /><br />Thanks for posting about bad metals. They deserve more attention.<br /><br />This <a href="http://condensedconcepts.blogspot.com.au/2014/09/is-there-quantum-limit-to-diffusion-in.html" rel="nofollow">post</a> might be of interest. It references a recent preprint<br /><a href="http://arxiv.org/abs/1409.5662" rel="nofollow">Absence of a quantum limit to charge diffusion in bad metals</a><br />that shows results that are inconsistent with the proposals based on techniques from quantum gravity.Ross H. McKenziehttps://www.blogger.com/profile/09950455939572097456noreply@blogger.comtag:blogger.com,1999:blog-13869903.post-77210846087097410442014-09-20T14:42:00.800-05:002014-09-20T14:42:00.800-05:00Thank you for taking the time to put together this...Thank you for taking the time to put together this post, and many others like it. Condensed matter physics sorely needs such accessible expositions!Tedhttps://www.blogger.com/profile/05275875187607394614noreply@blogger.com