Signatures Of Inhomogeneous Electronic State In Quantum Limit In Graphite

In-plane magnetoresistance (MR) measurements performed on highly oriented pyrolytic graphite (HOPG) in Corbino-disk geometry revealed signatures of the electronic inhomogeneous state. In particular, the obtained results showed that besides of the Shubnikov-de-Haas (SdH) effect, the magnetic field B > 4 T triggers MR oscillations of a different origin that are spatially asymmetric. The possible coexistence of different electronic states in quantized magnetic field is discussed. © 2009 World Scientific Publishing Company.23Dez/1327232726Iye, Y., (1982) Phys. Rev. B, 25, p. 5478(1984) Phys. Rev. B, 30, p. 7009Timp, G., Dresselhaus, P.D., Chieu, T.C., Dresselhaus, G., Iye, Y., (1983) Phys. Rev. B, 28, p. 7393Iye, Y., Dresselhaus, G., (1985) Phys. Rev. Lett, 54, p. 1182Fukuyama, H., Platzman, P.M., Anderson, P.W., (1979) Phys. Rev. B, 19, p. 5211Kopelevich, Y., Lemanov, V.V., Moehlecke, S., Torres, J.H.S., (1999) Phys. Solid State, 41, p. 1959Kopelevich, Y., Torres, J.H.S., da Silva, R.R., Mrowka, F., Kempa, H., Esquinazi, P., (2003) Phys. Rev. Lett, 90, p. 156402Tesanovic, Z., Rasolt, M., (1989) Phys. Rev. B, 39, p. 2718Akera, H., MacDonald, A.H., Girvin, S.M., Norman, M.R., (1991) Phys. Rev. Lett, 67, p. 2375Lukyanchuk and Y. Kopelevich, Phys. Rev. Lett. 93, 166402 (2004)Csathy, G.A., Tsui, D.C., Pfeiffer, L.N., West, K.W., (2004) Phys. Rev. Lett, 92, p. 25680