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2001


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Polymer depletion interaction between two parallel repulsive walls

Schlesener, F., Hanke, A., Klimpel, R., Dietrich, S.

Physical Review E, 63, 2001 (article)

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[BibTex]

2001


[BibTex]


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Positron annihilation studies on the migration of deformation induced vacancies in stainless steel AISI 316 L

Holzwarth, U., Barbieri, A., Hansen-Ilzhofer, S., Schaaff, P., Haaks, M.

Applied Physics A-Materials Science \& Processing, 73(4):467-475, 2001 (article)

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[BibTex]

[BibTex]


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Self-diffusion of 71Ge in Si-Ge

Strohm, A., Voss, T., Frank, W., Raisanen, J., Dietrich, M.

Physica B, 308, pages: 542-545, 2001 (article)

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[BibTex]

[BibTex]


Isotropic second-order nonlinear optical susceptibilities
Isotropic second-order nonlinear optical susceptibilities

Fischer, P., Buckingham, A., Albrecht, A.

PHYSICAL REVIEW A, 64(5), 2001 (article)

Abstract
The second-order nonlinear optical susceptibility, in the electric dipole approximation, is only nonvanishing for materials that are noncentrosymmetric. Should the medium be isotropic, then only a chiral system. such as an optically active liquid, satisfies this symmetry requirement. We derive the quantum-mechanical form of the isotropic component of the sum- and difference-frequency susceptibility and discuss its unusual spectral properties. We show that any coherent second-order nonlinear optical process in a system of randomly oriented molecules requires the medium to be chiral. and the incident frequencies to be different and nonzero. Furthermore, a minimum of two nondegenerate excited molecular states are needed for the isotropic part of the susceptibility to be nonvanishing. The rotationally invariant susceptibility is zero in the static field limit and shows exceptionally sensitive resonance and dephasing effects that are particular to chiral centers.

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DOI [BibTex]

DOI [BibTex]


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Crystal structures and freezing of dipolar fluids

Groh, B., Dietrich, S.

Physical Review E, 63(02), 2001 (article)

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[BibTex]

[BibTex]


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Non-Gaussian morphology on large scales: Minkowski functionals of the REFLEX cluster catalogue

Kerscher, M., Mecke, K., Schuecker, P., Böhringer, H., Guzzo, L., Collins, C. A., Schindler, S., De Grandi, S., Cruddace, R.

Astronomy & Astrophysics, 377(1):1-16, 2001 (article)

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[BibTex]

[BibTex]


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Adsorption isotherms of hydrogen: The role of thermal fluctuations

Vorberg, J., Herminghaus, S., Mecke, K.

Physical Review Letters, 87(19), 2001 (article)

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[BibTex]

[BibTex]


Reply to ``Comment on `Phenomenological damping in optical response tensors'{''}
Reply to “Comment on ‘Phenomenological damping in optical response tensors’”

Buckingham, A., Fischer, P.

PHYSICAL REVIEW A, 63(4), 2001 (article)

Abstract
We show that damping factors must not be incorporated in the perturbation of the ground state by a static electric field. If they are included, as in the theory of Stedman et al. {[}preceding Comment. Phys. Rev. A 63, 047801 (2001)], then there would be an electric dipole in the y direction induced in a hydrogen atom in the M-s = + 1/2 state by a static electric field in the x direction. Such a dipole is excluded by symmetry.

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DOI [BibTex]


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Morphological fluctuations of large-scale structure: The PSCz survey

Kerscher, M., Mecke, K., Schmalzing, J., Beisbart, C., Buchert, T., Wagner, H.

Astronomy \& Astrophysics, 373(1):1-11, 2001 (article)

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[BibTex]

[BibTex]


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Polydisperse fluid in contact with a semipermeable membrane

Bryk, P., Patrykiejew, A., Sokolowski, S.

Molecular Physics, 99(20):1709-1717, 2001 (article)

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[BibTex]

[BibTex]


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Diffusion of 195Au in amorphous Si3N4 and Si4N3

Voss, T., Matics, S., Strohm, A., Frank, W., Bilger, G.

Physica B, 308, pages: 431-433, 2001 (article)

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[BibTex]

[BibTex]