tag:blogger.com,1999:blog-5439168179960787195.post4836982593147426884..comments2024-03-28T17:13:01.117+10:00Comments on Condensed concepts: Deconstructing the metal-insulator transition in 2DEGsRoss H. McKenziehttp://www.blogger.com/profile/09950455939572097456noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-5439168179960787195.post-45786877532029101612013-07-17T18:27:25.106+10:002013-07-17T18:27:25.106+10:00Today I talked to Kravchenko about measuring the f...Today I talked to Kravchenko about measuring the full temperature dependence of the thermopower, to test my claim that it should saturate with a value of order <br />k_B/e ~ 40 microvolt/K<br />at a temperature of the order of the coherence temperature [which should scale inversely with the effective mass].<br />This saturation corresponds to the entropy per electron being of order k_B ln(2), i.e. as expected for a bad metal.<br /><br />He said the problem is that his cryostat is a dilution refrigerator and so only works up to one Kelvin. Thus a different apparatus will be needed. <br />I still think it is worth the effort.Ross H. McKenziehttps://www.blogger.com/profile/09950455939572097456noreply@blogger.comtag:blogger.com,1999:blog-5439168179960787195.post-51428060230307222852012-04-27T10:24:58.301+10:002012-04-27T10:24:58.301+10:00This paper is not published in Phys. Rev. B 85, 08...This paper is not published in Phys. Rev. B 85, 085133 (2012).Vlad Dobrosavljevichttps://www.blogger.com/profile/07405260417982480876noreply@blogger.comtag:blogger.com,1999:blog-5439168179960787195.post-15186944820223716692012-01-14T04:53:30.630+10:002012-01-14T04:53:30.630+10:00Thanks for the kind words Ross. As to thermopower,...Thanks for the kind words Ross. As to thermopower, very recent data by A. Mokashi, S. Li, Bo Wen, S. V. Kravchenko, A. A. Shashkin, V. T. Dolgopolov, M. P. Sarachik, in the preprint entitled "Divergence of the effective mass in a strongly-interacting 2D electron system" (arXiv:1111.7238v1) indeed shows results consistent with what we proposed.Vlad Dobrosavljevichttps://www.blogger.com/profile/07405260417982480876noreply@blogger.com