Structure and photoluminescence of helium-intercalated fullerite C₆₀

Structure and photoluminescence of helium-intercalated fullerite C₆₀

Legchenkova, I.V. ; Prokhvatilov, A.I. ; Stetsenko, Yu.E. ; Strzhemechny, M.A. ; Yagotintsev, K.A. ; Avdeenko, A.A. ; Eremenko, V.V. ; Zinoviev, P.V. ; Zoryansky, V.N. ; Silaeva, N.B. ; Ruoff, R.S.

Тема: Письма pедактоpу

Інший ID: PACS: 61.48.+c, 61.66.-f, 71.35.Aa, 78.55.-m

URI: http://dspace.nbuv.gov.ua/handle/123456789/128766

Посилання: Structure and photoluminescence of helium-intercalated fullerite C₆₀ / I.V. Legchenkova, A.I. Prokhvatilov, Yu. E. Stetsenko, M.A. Strzhemechny, K.A. Yagotintsev, A.A. Avdeenko, V.V. Eremenko, P.V. Zinoviev, V.N. Zoryansky, N.B. Silaeva, R.S. Ruoff // Физика низких температур. — 2002. — Т. 28, № 12. — С. 1320-1323. — Бібліогр.: 16. назв. — англ.

Дата: 2002

Завантажень: 424

Structure and photoluminescence of helium-intercalated fullerite C₆₀

Анотація:

Intercalation of C₆₀ single crystals with helium was studied by powder x-ray diffractometry. It was established that the intercalation is a two-stage process, octahedral cavities are filled first and then tetrahedral ones, the chemical pressure being negative during both stages. For the first time low-temperature (5 K) photoluminescence spectra of helium-intercalated fullerite C₆₀ were studied. The presence of helium in lattice voids was shown to reduce that part of the luminescent intensity which is due to the emission of covalently bound pairs of C₆₀ molecules, the socalled "deep traps" with the 0-0 transition energy close to 1.69 eV. The mechanism of the effect of the intercalation with helium on the pair formation in fullerite C₆₀ is discussed.

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