0000000001302467
AUTHOR
Alejandro Gaita-ari��o
Ar:N$_2$ - a non-universal glass
The bias energies of various two-level systems (TLSs) and their strengths of interactions with the strain are calculated for Ar:N$_2$ glass. Unlike the case in KBr:CN, a distinct class of TLSs having weak interaction with the strain and untypically small bias energies is not found. The addition of CO molecules introduces CO flips which form such a class of weakly interacting TLSs, albeit at much lower coupling than are typically observed in solids. We conclude that because of the absence of a distinct class of weakly interacting TLSs, Ar:N$_2$ is a non-universal glass, the first such system in three dimensions and in ambient pressure. Our results further suggest that Ar:N$_2$:CO may show un…
Proposal for a dual spin filter based on [VO(C$_3$S$_4$O)$_2$]$^{2-}$
Polynuclear magnetic molecules often present dense transmission spectra with many overlapping conduction spin channels. Single-metal complexes display a sparser density of states, which in the presence of a fixed external magnetic field makes them interesting candidates for spin filtering. Here we perform a DFT study of a family of bis- and tris-dithiolate vanadium complexes sandwiched between Au(111) electrodes and demonstrate that [VO(C$_3$S$_4$O)$_2$]$^{2-}$ can behave as a dual spin filter. This means that an external stimulus can switch between the selective transmission of spin-up and spin-down carriers. By using an electrostatic gate as external stimulus we show that the onset for th…
CSD 2036360: Experimental Crystal Structure Determination
Related Article: Junjie Liu, Jakub Mrozek, Aman Ullah, Yan Duan, Jos�� J. Baldov��, Eugenio Coronado, Alejandro Gaita-Ari��o, Arzhang Ardavan|2021|Nat.Phys.|17|1205|doi:10.1038/s41567-021-01355-4
CSD 2036359: Experimental Crystal Structure Determination
Related Article: Junjie Liu, Jakub Mrozek, Aman Ullah, Yan Duan, Jos�� J. Baldov��, Eugenio Coronado, Alejandro Gaita-Ari��o, Arzhang Ardavan|2021|Nat.Phys.|17|1205|doi:10.1038/s41567-021-01355-4
CSD 2036358: Experimental Crystal Structure Determination
Related Article: Junjie Liu, Jakub Mrozek, Aman Ullah, Yan Duan, Jos�� J. Baldov��, Eugenio Coronado, Alejandro Gaita-Ari��o, Arzhang Ardavan|2021|Nat.Phys.|17|1205|doi:10.1038/s41567-021-01355-4