Entangled State Tunneling in Strongly Correlated Systems under Bias

Date

Aug 31, 2017

Time

10:00 AM - 11:00 AM

Speaker

Jongbae Hong

Affiliation

Seoul National University

Language

en

Main Topic

Physik

Other Topics

Physik

Description

This seminar shows that entangled state tunneling under bias can properly explain tunneling conductance line shapes of correlated systems such as cuprate and iron-based superconductors [1] as well as mesoscopic Kondo systems [2]. In the former, the density of states (DOS) is an important quantity unlike the latter. We obtain the DOS in the fitting process of theoretical tunneling conductance to the experimental data. The obtained density of states is consistent with the spectral function given by angle-resolved photoemission spectroscopy (ARPES). It has been known that an inconsistency for the superconducting gap always exists in comparison between ARPES and scanning tunneling spectroscopy. Removing the inconsistency is a long standing task in condensed matter physics. I show that entangled state tunneling may resolve this problem. In addition, the origin of two side peaks appearing in tunneling conductance of all correlated systems is clarified. I will show that the appearance of two side peaks is a generic feature of non-equilibrium coherent tunneling in strongly correlated systems. We use the Green’s function technique in operator space (Liouvillian approach) instead of Hamiltonian approach because the latter has difficulties in determining basis vectors.

Last modified: Aug 31, 2017, 9:48:24 AM