Artículos de revistas
Extraordinary Magnetoresistance In Graphite: Experimental Evidence For The Time-reversal Symmetry Breaking
Registro en:
Journal Of Physics Condensed Matter. , v. 25, n. 46, p. - , 2013.
9538984
10.1088/0953-8984/25/46/466004
2-s2.0-84887005803
Autor
Kopelevich Y.
Da Silva R.R.
Camargo B.C.
Alexandrov A.S.
Institución
Resumen
We report a highly anisotropic in-plane magnetoresistance (MR) in graphite that possesses in-plane parallel line-like structural defects. In a current direction perpendicular to the line defects (LD), MR is negative and linear in low fields with a crossover to a positive MR at higher fields, while in a current direction parallel to LD, we observed a giant super-linear positive MR. These extraordinary MRs are respectively explained by a hopping magnetoresistance via non-zero angular momentum orbitals, and by the magnetoresistance of inhomogeneous media. The linear negative orbital MR is a unique signature of the broken time-reversal symmetry (TRS). We discuss the origin of the disorder-induced TRS-breaking in graphite. © 2013 IOP Publishing Ltd. 25 46
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