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Role of the changing sign of effective electron–electron correlation energy for information recording in PCM
Author(s) -
Bogoslovskiy Nikita,
Tsendin Konstantin
Publication year - 2015
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201451613
Subject(s) - electron , chalcogenide , electronic correlation , condensed matter physics , fermi energy , sign (mathematics) , physics , correlation , conductivity , mathematics , quantum mechanics , optoelectronics , mathematical analysis , geometry
We consider the centers with negative electron–electron correlation energy. It is shown that in strong electric field the effective electron–electron correlation energy can become positive. As a result the Fermi level shifts and the conductivity increases sharply which we call the conductivity transition. This transition may cause the nonlinearity and a sufficient increase of the current density while data recording in chalcogenide‐based phase‐change memory (PCM).