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

Article

关键词: TRANSFER-HAMILTONIAN FORMALISM;    MANY-PARTICLE POINT;    VORTEX CORE STATES;    OF-STATES;    QUANTUM TRANSPORT;    IMPURITY ATOMS;    SHOT-NOISE;    SUPERCONDUCTIVITY;    SPECTROSCOPY;    MICROSCOPE;   

DOI  :  10.1103/PhysRevB.84.155414

来源: SCIE

【 摘 要 】

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.

【 授权许可】

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