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1005751_Dobrosavljevic

Fingerprints of Intrinsic Phase Separation: Magnetically Doped Two-Dimensional Electron Gas Vladimir Dobrosavljevic, Florida State University, DMR 1005751.

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1005751_Dobrosavljevic

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  1. Fingerprints of Intrinsic Phase Separation: Magnetically Doped Two-Dimensional Electron GasVladimir Dobrosavljevic, Florida State University, DMR 1005751 In addition to Anderson and Mott localization, intrinsic phase separation (IPS) has long been advocated as the thirdfundamental mechanism controlling the doping-driven metal-insulator transitions (MITs). In electronic systems, where charge neutrality precludes global phase separation, it may lead to various inhomogeneous states and dramatically affect transport. Here we theoretically predict the precise experimental signatures of such phase separation-driven MITs. Our predictions find striking agreement with recent experiments on Mn-doped CdTe quantum wells, a system where we identify the microscopic origin for intrinsic phase separation. . In the presence of magnetically driven IPS, low-density carriers are trapped in ferromagnetic clusters from which they can escape by thermal activation. This results in resistivity which is a strong function of temperature and magnetic field but has a very weak density dependence. Figure from: Phys. Rev. Lett. 106, 186402 (2011).

  2. Fingerprints of Intrinsic Phase Separation: Magnetically Doped Two-Dimensional Electron GasVladimir Dobrosavljevic, Florida State University, DMR 1005751 “Quantum phase transitions describe the violent rearrangement of electrons or atoms as they evolve from well defined excitations in one phase to a completely different set of excitations in another. The problem necessarily involves many interacting particles and therein lies the challenge to develop a multi-faceted theory. Experiments probing microscopic structure, transport, charge and spin dynamics provide important clues. What sets this book apart is a strong dialog between experiment and theory that has the potential to solve some major issues in many-body physics.” (from book cover) The PI co-authored a monograph published by Oxford University Press (Aug. 2012), bringing the cutting-edge research in his field to the public at large.

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