Abstract
Large positive magnetoresistance has been observed in parallel magnetic fields in a single 2D layer in a delta-doped GaAs/AlGaAs heterostructure with a variable-range-hopping (VRH) mechanism of conductivity. This implies that spins play an important role in 2D VRH conductivity. A possible explanation involves hopping via double occupied states in the upper Hubbard band, where the intra-state correlation of spins is important.
Original language | English |
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Pages (from-to) | 181-183 |
Number of pages | 3 |
Journal | Physica Status Solidi (B): Basic Research |
Volume | 218 |
Issue number | 1 |
DOIs | |
State | Published - Mar 2000 |