Darwin and American public administration .

This research note addresses a gap in the public administration literature by arguing that a political Darwinism was present in the intellectual origins of American administrative theory. By examining the arguments of Woodrow Wilson, this article demonstrates that Darwinism complemented the German political thought that contributed to the establishment of America's administrative state. The application of Darwinian evolutionary biology to politics was a vital element of Wilson's reconceptualization of the state as a living organism.

Unconventional transformation of spin Dirac phase across a topological quantum phase transition.

The topology of a topological material can be encoded in its surface states. These surface states can only be removed by a bulk topological quantum phase transition into a trivial phase. Here we use photoemission spectroscopy to image the formation of protected surface states in a topological insulator as we chemically tune the system through a topological transition.

Angle-resolved synchrotron photoemission and density functional theory on the iridium modified Si(1 1 1) surface.

The physical and electronic properties of the Ir modified Si(1 1 1) surface have been investigated with the help of angle resolved photoemission spectroscopy and density functional theory. The surface consists of Ir-ring clusters that form a [Formula: see text]reconstruction. A comparison between the measured and calculated band structure of the system reveals that the dispersions of the projected bulk states and the states originating from [Formula: see text] domains are heavily modified due to Umklapp scattering from the surface Brillouin zone.

Spin-orbital entanglement and the breakdown of singlets and triplets in Sr2RuO4 revealed by spin- and angle-resolved photoemission spectroscopy.

Spin-orbit coupling has been conjectured to play a key role in the low-energy electronic structure of Sr2RuO4. By using circularly polarized light combined with spin- and angle-resolved photoemission spectroscopy, we directly measure the value of the effective spin-orbit coupling to be 130±30  meV. This is even larger than theoretically predicted and comparable to the energy splitting of the dxy and dxz,yz orbitals around the Fermi surface, resulting in a strongly momentum-dependent entanglement of spin and orbital character in the electronic wavefunction.