Odd-even binding effect from random two-body interactions

Details Odd-even binding effect from random two-body interactions Odd-even binding effect from random two-body interactions

2002-02-27

arxiv.org/abs/cond-mat/0202493v1

Phys.Rev. B65 (2002) 235120

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 4 eps figures

Scientific paper

10.1103/PhysRevB.65.235120

Systematic odd-even binding energy differences in finite metallic particles are usually attributed to mean-field orbital energy effects or to a coherent pairing interaction. We show analytically and numerically that a purely random two-body Hamiltonian can also give rise to an odd-even staggering. We explore the characteristics of this chaotic mechanism and discuss distinguishing features with respect to the other causes of staggering. In particular, randomness-induced staggering is found to be a smooth function of particle number, and the mechanism is seen to be largely insensitive to the presence of a magnetic field.

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