Time-dependent density-functional-theory study of the suppressed tunneling ionization of vanadium

Xi Chu and Gerrit C. Groenenboom
Phys. Rev. A 94, 053417 – Published 21 November 2016

Abstract

Using a time-dependent density-functional-theory (TDDFT) method that incorporates the exact exchange, we reproduce the measured ionization suppression for vanadium in 1500-nm lasers of 1.4 to 2.8×1013W/cm2. The calculated ionization yields are 0.07 to 0.5 in 100 fs sin2 pulses. For weaker laser intensities a method with more configurations is needed to properly describe the multiphoton, rather than tunneling, ionization of a transition-metal atom. Our calculations show that the isotropic component of the induced potential increases the binding energy of the electron while the dipole component elevates the potential barrier of tunneling ionization. Both effects suppress the tunneling ionization.

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  • Received 26 August 2016

DOI:https://doi.org/10.1103/PhysRevA.94.053417

©2016 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Xi Chu

  • Department of Chemistry and Biochemistry, University of Montana, Missoula, Montana 59812, USA

Gerrit C. Groenenboom

  • Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands

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Issue

Vol. 94, Iss. 5 — November 2016

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