Browsing by Author "Dolgopolov, V. T."

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    Spin effect on the low-temperature resistivity maximum in a strongly interacting 2D electron system
    Shashkin, A. A.; Melnikov, M. Yu.; Dolgopolov, V. T.; Radonjić, M. M.; Dobrosavljević, V; Huang, S.-H.; Liu, C. W.; Zhu, Amy Y. X.; Kravchenko, S. V.
    The increase in the resistivity with decreasing temperature followed by a drop by more than one order of magnitude is observed on the metallic side near the zero-magnetic-field metal-insulator transition in a strongly interacting two-dimensional electron system in ultra-clean SiGe/Si/SiGe quantum wells. We find that the temperature T-max, at which the resistivity exhibits a maximum, is close to the renormalized Fermi temperature. However, rather than increasing along with the Fermi temperature, the value T-max decreases appreciably for spinless electrons in spin-polarizing (parallel) magnetic fields. The observed behaviour of T-max cannot be described by existing theories. The results indicate the spin-related origin of the effect.