Metal-insulator transition in amorphous alloys
| dc.creator | Mobius, A. | |
| dc.creator | Adkins, C. J. | |
| dc.date | 2001-11-01 | |
| dc.date.accessioned | 2026-07-07T02:43:22Z | |
| dc.date.available | 2026-07-07T02:43:22Z | |
| dc.description | We focus on the central problem of discriminating between metallic and insulating behaviour in amorphous alloys formed between a semiconductor and a metal. For this, the logarithmic temperature derivative of the conductivity, w = d ln sigma / d ln T, has proved over recent years to be very helpful in determining the critical value x_c of the metal content x for the metal-insulator transition (MIT). We show that, for various amorphous alloys, recent experimental results on w(T,x) are qualitatively inconsistent with the usual assumptions of continuity of the MIT at T = 0 and of sigma(T,x_c) being proportional to a power of T. These results suggest that w(T,x_c) tends to 0 as T -> 0, in which case the MIT should be discontinuous at T = 0 (but only there), in agreement with Mott's hypothesis of a finite minimum metallic conductivity. | |
| dc.description | 20 pages (RevTex), 11 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0111017 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0111017 | |
| dc.identifier | Current Opinion in Solid State and Materials Science 4, 303 (1999) | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/18470 | |
| dc.subject | Disordered Systems and Neural Networks | |
| dc.subject | Materials Science | |
| dc.title | Metal-insulator transition in amorphous alloys | |
| dc.type | text |