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Tunneling conductance and local density of states in tight-binding junctions

Published in Physical Review. B, Condensed Matter. 2011, vol. 84, no. 15, p. 155414
Abstract We study the relationship between the differential conductance and the local density of states in tight-binding tunnel junctions where the junction geometry can be varied between the point-contact and the planar-contact limits. The conductances are found to differ significantly in these two limiting cases. We also examine how the matrix element influences the tunneling characteristics and produces contrast in a simple model of scanning tunneling microscope (STM). Some implications regarding the interpretation of STM spectroscopic data in the cuprates are discussed. The calculations are carried out within the real-space Keldysh formalism.
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BERTHOD, Christophe, GIAMARCHI, Thierry. Tunneling conductance and local density of states in tight-binding junctions. In: Physical Review. B, Condensed Matter, 2011, vol. 84, n° 15, p. 155414. doi: 10.1103/PhysRevB.84.155414 https://archive-ouverte.unige.ch/unige:23852

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Deposited on : 2012-11-07

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