c-axis interaction and conductivity of a stage-2SbCl5-graphite compound

Abstract

de Haas -van Alphen (dHvA) experiments of a slowly cooled, stage-2 SbC15-graphite compound show splitting of the dHvA frequencies of the graphitic energy bands. The splitting is caused by the interaction between states separated by intercalate layers. The values of the interactions for the two graphitic bands are estimated to be 0.6 and 0.7 meV. X-ray diffraction shows a doubling of the caxis lattice vector which modifies the energy bands. With use of the estimated values of the c-axis interaction, it is shown that a band-conduction mechanism can account for the large anisotropy of the conductivity of stage-2 SbC1&-intercalated graphite.

Electrical Conductivity and Conduction ESR in Incommensurate Phase of Graphite Intercalation Compounds C5nHNO3

“…Then, inserting in Eq. (1) the following set of parameters: s c ¼1.9 W --1 cm --1 , s a ¼ 8 Â 10 5 W --1 cm --1 , V 0 ¼ (2-3) Â 10 --2 eV [11,13,14], N ¼ 1.02 Â 10 21 cm --3 [47] d I ¼ 7.80 A and m * ¼ (0.06-0.32)m 0 [48][49][50][51][52][53] (m 0 being the mass of free electron), we have found: N C ¼ (1.1-65) Â 10 --5 paths/unit cell. (Values of s c , s a and d I , utilized in calculation of N C , have been determined by us.…”

“…In the literature, for the explanation of the s c peculiarities, including the abovementioned ones, alternative models postulating its band [10][11][12][13][14] or non-band [6,[15][16][17][18][19][20] origin have been suggested. Therefore, search for and study of new properties of s c in acceptor GICs, which clarify its origin, are important steps towards creating a theory of the c-axis charge transport in these synthetic metals.…”