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Steric quenching of the switchable mirror effect Phys. Rev. B 75, 104109 (2007) | | Troy C. Messina
; Casey W. Miller
; John T. Markert
; | | Date: |
20 Mar 2007 | | Journal: | Phys. Rev. B 75, 104109 (2007) | | Subject: | Materials Science | | Abstract: | Scandium was substituted for yttrium to observe the effect of unit cell size on the optical metal-to-insulator (MIT) transition in the Y_(1-z)Sc_(z)H_(x) alloy system. The optical transmittance decreases significantly for z>0.10. Simultaneous electrical resistivity measurements confirm the transition from trihydride to dihydride behavior with increasing z. These observations imply a quenching of the MIT when the unit cell volume falls below a critical level that is consistent with the boundary between trihydride and non-trihydride forming rare-earth elements. A combinatoric model reveals this formation boundary corresponds to two or more Sc per unit cell. | | Source: | arXiv, cond-mat/0703521 | | Services: | Forum | Review | PDF | Favorites | |
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