dc.creator | Bokacheva, L. | |
dc.creator | Teizer, Winfried | |
dc.creator | Hellman, F. | |
dc.creator | Dynes, RC. | |
dc.date.accessioned | 2012-09-19T20:05:34Z | |
dc.date.available | 2012-09-19T20:05:34Z | |
dc.date.issued | 2004 | |
dc.identifier.citation | L. Bokacheva, Winfried Teizer, F. Hellman and RC Dynes. Phys.Rev.B 69 235111 2004."Copyright (2004) by the American Physical Society." | en |
dc.identifier.uri | http://dx.doi.org/10.1103/PhysRevB.69.235111 | |
dc.identifier.uri | https://hdl.handle.net/1969.1/146800 | |
dc.description | Journals published by the American Physical Society can be found at http://journals.aps.org/ | en |
dc.description.abstract | We have performed detailed conductivity and tunneling measurements on the amorphous, magnetically doped material alpha-GdxSi1-x, which can be driven through the metal-insulator transition by the application of an external magnetic field. Low temperature conductivity increases linearly with field near the transition and slightly slower on the metallic side. The tunneling conductance, proportional to the density of states N(E), undergoes a gradual change with increasing field, from insulating, showing a soft gap at low bias, with a slightly slower than parabolic energy dependence, i.e., N(E)similar toE(c), cless than or similar to2, towards metallic behavior, with E-d, 0.5<d<1 energy dependence. The density of states at the Fermi level in a sample, which shows already a small, but metal-like conductivity, appears to be zero at low fields, as in an insulator. We speculate that this behavior is due to the microscopic percolation nature of transport near the transition. | en |
dc.language.iso | en | |
dc.publisher | American Physical Society | |
dc.rights | This work is archived in the Texas A&M Digital Repository with the express permission of the rights holder (commonly but not always the publisher). A copy of the permission document is on file with the Texas A&M University Libraries. | en |
dc.subject | GIANT NEGATIVE MAGNETORESISTANCE | en |
dc.subject | LOW-TEMPERATURE | en |
dc.subject | MAGNETIC-FIELD | en |
dc.subject | COULOMB GAP | en |
dc.subject | DOPED SILICON | en |
dc.subject | NB-SI | en |
dc.subject | CONDUCTIVITY | en |
dc.subject | ALLOYS | en |
dc.subject | SEMICONDUCTOR | en |
dc.subject | SYSTEMS | en |
dc.subject | Physics | en |
dc.title | Variation of the density of states in amorphous GdSi at the metal-insulator transition | en |
dc.type | Article | en |
local.department | Physics and Astronomy | en |