Energy levels and classifications of triply excited states of N4+, O5+, F6+, and Ne7+

Understanding of the Switching Mechanism of a Pt/Ni-Doped SrTiO3 Junction via Current–Voltage and Capacitance–Voltage Measurements

“…We have chosen these three ions partly because the work-function results have been previously reported (albeit within a different numerical procedure) for the even-Z series as well as for He − and Li [36]; so we do not repeat them. Besides in the literature, relatively less results are available for the odd-Z series [27,28,31,74] than the even-Z series [19-21, 27, 28, 31, 74]. Therefore it may be useful to have the results for the odd-Z series, which will complete the work-function results for the isoelectronic series up to Z = 10.…”

“…a Rayleigh-Ritz variational principle [74]. Recently, the position of all these states for these ions have been calculated by Safronova and Bruch [31] on the basis of a perturbation theory method (1/Z expansion) as well as by Conneely et al [27,28] following the TDM. It is evident that the current positions of these states for all the three ions follow the same rank orderings of [31] and [27,28].…”

“…Recently, the position of all these states for these ions have been calculated by Safronova and Bruch [31] on the basis of a perturbation theory method (1/Z expansion) as well as by Conneely et al [27,28] following the TDM. It is evident that the current positions of these states for all the three ions follow the same rank orderings of [31] and [27,28]. For all these states, excellent agreement with the literature data is noted with the largest absolute discrepancy of 0.125% (the deviation ranges are 0.0005-0.125%, 0.007-0.049% and 0.044-0.099% for the three ions, respectively).…”

“…Although remarkable progress has been achieved lately for similar resonances of some systems including highly charged ions as already mentioned, such resonances are yet to be observed for the Li-isoelectronic sequence, which would greatly enhance our understandings on these systems. Almost all the publications on these ions have dealt exclusively only with the 2l2l 2l intrashell states; the only reported results on the 2l2l nl (n > 2) resonance series, such as those considered in this work, are due to the recent TDM tabulations of Conneely et al [27,28]. Besides, to the best of my knowledge, we are not aware of any density-based results so far for the hollow resonances of these three-electron ions.…”

“…In a later work, Safronova and Senashenko [16] performed a detailed and systematic study on the n = 2 intrashell states of the Li-isoelectronic series employing a 1/Z expansion approach for a wide range of Z. Thereafter, a multitude of theoretical methodologies have been proposed which provide results in fairly good agreement with the experimental works, namely, the joint saddle point (SP) and complex coordinate rotation (CCR) method [17][18][19][20], the state-specific theory [21,22], the space partition and stabilization approach [23], the R-matrix theory along with many of its variants [24,25], the truncated diagonalization method (TDM) [26][27][28], the hyperspherical coordinate formalism [29,30], etc.…”