arXiv subjects

Gunnar Palsson

Publications and source records attributed to Gunnar Palsson.

3 recordsLinked to original sources

arXiv2018

The root cause of hydrogen induced changes in optical transmission of vanadium

The changes in the optical transmission of thin vanadium layers upon hydrogen absorption are found to be dominated by the volume changes of the layers and not directly linked to concentration. This effect is demonstrated by utilising the difference in the hydrogen induced expansion of V layers in Fe/V and Cr/V superlattices. Hydrogen resides solely in the vanadium layers in these superlattices, while occupying different sites, causing different lattice expansion. Quantitative agreement is obtained between the experimental results and first principle density functional calculations.

cond-mat.mes-hall↗

arXiv2000

Cellular Dynamical Mean Field Approach to Strongly Correlated Systems

We propose a cellular version of dynamical-mean field theory which gives a natural generalization of its original single-site construction and is formulated in different sets of variables. We show how non-orthogonality of the tight-binding basis sets enters the problem and prove that the resulting equations lead to manifestly causal self energies.

cond-mat.str-el↗

arXiv1999

Thermoelectric Response Near the Density Driven Mott Transition

We investigate the thermoelectric response of correlated electron systems near the density driven Mott transition using the dynamical mean field theory.

cond-mat.str-el↗