Key to Understanding Interstitial<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>H</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>in Si

Chen, E. Elinor; Stavola, Michael; Fowler, W. Beall; Walters, Peter

doi:10.1103/physrevlett.88.105507

Cited by 68 publications

(95 citation statements)

References 21 publications

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“…IR spectra of such systems are usually broad because of inhomogeneities in the system or because of random molecular collisions. As an exception, narrow lines are observed in semiconductor crystals [77] and solid hydrogen [78].…”

Section: (B) Model Hamiltonian Of H 2 @C 70mentioning

confidence: 97%

Infrared spectroscopy of small-molecule endofullerenes

Rõõm

Peedu

et al. 2013

Phil. Trans. R. Soc. A.

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Hydrogen is one of the few molecules that has been incarcerated in the molecular cage of C 60 to form the endohedral supramolecular complex H 2 @C 60 . In this confinement, hydrogen acquires new properties. Its translation motion, within the C 60 cavity, becomes quantized, is correlated with its rotation and breaks inversion symmetry that induces infrared (IR) activity of H 2 . We apply IR spectroscopy to study the dynamics of hydrogen isotopologues H 2 , D 2 and HD incarcerated in C 60 . The translation and rotation modes appear as side bands to the hydrogen vibration mode in the mid-IR part of the absorption spectrum. Because of the large mass difference of hydrogen and C 60 and the high symmetry of C 60 the problem is almost identical to a vibrating rotor moving in a three-dimensional spherical potential. We derive potential, rotation, vibration and dipole moment parameters from the analysis of the IR absorption spectra. Our results were used to derive the parameters of a pairwise additive five-dimensional potential energy surface for H 2 @C 60 . The same parameters were used to predict H 2 energies inside C 70 . We compare the predicted energies and the low-temperature IR absorption spectra of H 2 @C 70 .

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Section: (B) Model Hamiltonian Of H 2 @C 70mentioning

confidence: 97%

Infrared spectroscopy of small-molecule endofullerenes

Rõõm

Peedu

et al. 2013

Phil. Trans. R. Soc. A.

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“…6 Hydrogen passivation of B in Si is very efficient because the Coulomb attraction between interstitial H + and B − results in a very large capture radius. 7 Thus, almost all B in Si can be passivated by H. 8,9 With increasing concentration of H, hydrogen molecules [10][11][12][13][14] and extended planar defects called platelets 9,15,16 are formed. Furthermore, additional H-͓or deuterium ͑D͔͒ related Raman peaks are observed in the range of 1900-2300 ͑1300-1700͒ cm −1 .…”

Section: Introductionmentioning

confidence: 99%

Formation of hydrogen-boron complexes in boron-doped silicon treated with a high concentration of hydrogen atoms

et al. 2005

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The formation of hydrogen ͑H͒ related complexes and their effect on boron ͑B͒ dopant were investigated in B-ion implanted and annealed silicon ͑Si͒ substrates treated with a high concentration of H. Isotope shifts by replacement of 10 B with 11 B were observed for some H-related Raman peaks, but not for other peaks. This shows proof of the formation of B-H complexes in which H directly bonds to B in Si. This is an experimental result concerning the formation of B-H complexes with H bonded primarily to B. Electrical resistivity measurements showed that the B acceptors are passivated via the formation of the observed B-H complexes, as well as the well-known passivation center in B-doped Si; namely, the H-B passivation center.

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“…• Silicon, which is known to incorporate hydrogen molecules 12 although only in low concentrations. A problem is its very low conductivity.…”

Section: Active Materials Requirementsmentioning

confidence: 99%

Triple Deuterium Fusion by Three Body Recombination Between Deuteron and the Nuclei of Lattice Trapped Deuterium Molecules

Engvild¹,

Kowalski²

2005

Condensed Matter Nuclear Science

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A hypothesis is proposed where low energy nuclear reactions involve three-body recombination of deuterons injected between the nuclei of D 2 molecules trapped in a dense lattice of a chemical compound of transition metal and impurity. Two D's fuse to 4 He, and the energy is converted by expulsion of the third deuteron. Measurable fusion occurs when two D's are confined within 0.1 angstrom of each other. Three boson (efimov) interactions can have longer range than two boson interactions. The best known example is triple alpha fusion to carbon-12 in stars. Triple deuterium interaction could perhaps be possible in the 0.5-1.0 angstrom range; the distance between D's in a D 2 molecule are 0.74 angstrom. The hypothesis accounts for the low reproducibility and short duration of the effect because of rapid destruction of the active structure by sputtering, radiation damage, bubble formation and chemical reduction of the impurities to compounds like D 2 O, ND 3 , CD 4 , or BD 3 . The hypothesis also accounts for the observed prevalence of 4 He >> tritium >> neutrons.

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Key to Understanding InterstitialH2in Si

Cited by 68 publications

References 21 publications

Infrared spectroscopy of small-molecule endofullerenes

Infrared spectroscopy of small-molecule endofullerenes

Formation of hydrogen-boron complexes in boron-doped silicon treated with a high concentration of hydrogen atoms

Triple Deuterium Fusion by Three Body Recombination Between Deuteron and the Nuclei of Lattice Trapped Deuterium Molecules

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