publication . Other literature type . Preprint . Article . 1992

Destructive quantum interference in spin tunneling problems.

Jan von Delft; Christopher L. Henley;
  • Published: 30 Nov 1992
  • Publisher: American Physical Society (APS)
Abstract
In some spin tunneling problems, there are several different but symmetry-related tunneling paths that connect the same initial and final configurations. The topological phase factors of the corresponding tunneling amplitudes can lead to destructive interference between the different paths, so that the total tunneling amplitude is zero. In the study of tunneling between different ground state configurations of the Kagom\'{e}-lattice quantum Heisenberg antiferromagnet, this occurs when the spin $s$ is half-odd-integer.
Subjects
arXiv: Condensed Matter::Strongly Correlated ElectronsCondensed Matter::Mesoscopic Systems and Quantum Hall EffectCondensed Matter::Superconductivity
free text keywords: Condensed Matter, Quantum system, Heisenberg model, Spin polarized scanning tunneling microscopy, Condensed matter physics, Quantum mechanics, Scanning tunneling spectroscopy, Physics, Quantum tunnelling, Spin-½, Quantum, Tunnel effect

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