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Spin-Orbital Liquid on a Triangular Lattice

100%

Oleś A., Chaloupka J.

Acta Physica Polonica A

2012

vol. 121

issue 5-6

1026-1028

Using Lanczos exact diagonalization of finite clusters we demonstrate that the spin-orbital d^1 model for triply degenerate t_{2g} orbitals on a triangular lattice provides an example of a spin-orbital liquid ground state. We also show that the spin-orbital liquid involves entangled valence bond states which violate the Goodenough-Kanamori rules, and modify effective spin exchange constants.

Electron Energy Spectra from the Strong-Field Double-Ionization of Xenon

61%

Chaloupka J., Lafon R., Rudati J., Sheehy B., Agostini P., Kulander K., DiMauro L.

Acta Physica Polonica A

2002

vol. 101

issue 3

337-346

The electron energy spectra correlated to the strong-field double-ionization of xenon are presented at three laser intensities. The double-ionization electrons are on average more energetic than those generated from single-ionization. This difference in energy is not manifested as a simple scaling to higher electron energies, but rather as a change in the shape of the spectra. This trend is observed at all intensities. Most notably, the comparison between single- and double-ionization spectra is very similar at low and high peak laser intensities. This could imply that a sequential double-ionization process dominates at all intensities, even where the double ion yield is enhanced.

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2 Acta Physica Polonica A

1 2012

1 2002

2 Chaloupka J.

1 Agostini P.

1 DiMauro L.

1 Kulander K.

1 Lafon R.

1 Oleś A.

1 Rudati J.

1 Sheehy B.

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Spin-Orbital Liquid on a Triangular Lattice

Electron Energy Spectra from the Strong-Field Double-Ionization of Xenon