Intermediate phase at the metal-insulator boundary in a magnetically doped two-dimensional electron system

J. Jaroszyński, T. Andrearczyk, G. Karczewski, J. Wróbel, T. Wojtowicz, Dragana Popović, and T. Dietl
Phys. Rev. B 76, 045322 – Published 19 July 2007

Abstract

A magnetotransport study in magnetically doped (Cd,Mn)Te two-dimensional quantum wells reveals an apparent metal-insulator transition as well as an anomalous intermediate phase just on its metallic side. This phase is characterized by colossal magnetoresistancelike phenomena, which may be due to the phase separation of the electron fluid and the associated emergence of ferromagnetic bubbles.

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  • Received 7 April 2007

DOI:https://doi.org/10.1103/PhysRevB.76.045322

©2007 American Physical Society

Authors & Affiliations

J. Jaroszyński1,*, T. Andrearczyk1,2, G. Karczewski2, J. Wróbel2, T. Wojtowicz2, Dragana Popović1, and T. Dietl2,3,4

  • 1National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA
  • 2Institute of Physics, Polish Academy of Sciences, 02-668 Warszawa, Poland
  • 3Institute of Theoretical Physics, Warsaw University, 00-681 Warszawa, Poland
  • 4ERATO Semiconductor Spintronics Project, Japan Science and Technology Agency, 02-668 Warszawa, Poland

  • *jaroszy@magnet.fsu.edu

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Issue

Vol. 76, Iss. 4 — 15 July 2007

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