TY - JOUR
T1 - Calculation of Optical Conductivity of Anderson Impurity Model for Various Model Parameters
AU - Hadad Halim, Sion
AU - Pundi Syaina, Lentara
AU - Majidi, Muhammad Aziz
N1 - Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2019/1/1
Y1 - 2019/1/1
N2 - Materials classified as strongly-correlated systems often exhibit complex and fascinating properties due to interactions among electrons as well as between electrons and other constituents of the material. A common model to describe electronic system with strong on-site Coulomb interaction is Hubbard model. One very powerful approximation method for solving Hubbard model having been widely used over the last few decades is dynamical mean-field theory (DMFT). This method maps the original lattice problem into an impurity problem embedded in a self-consistent bath. Apart from the many variants of implementation of DMFT, it relies on using an impurity solver as part of its algorithm. In this work, rather than solving a Hubbard model, we propose to explore the impurity solver itself for solving a problem of metallic host doped with correlated elements, commonly referred to as Anderson impurity model (AIM). We solve the model using the distributional exact diagonalisation method. Our particular aim is to show how the metal-insulator transition (MIT) occurs in the system and how the phenomenon reflects in its optical conductivity for various model parameters.
AB - Materials classified as strongly-correlated systems often exhibit complex and fascinating properties due to interactions among electrons as well as between electrons and other constituents of the material. A common model to describe electronic system with strong on-site Coulomb interaction is Hubbard model. One very powerful approximation method for solving Hubbard model having been widely used over the last few decades is dynamical mean-field theory (DMFT). This method maps the original lattice problem into an impurity problem embedded in a self-consistent bath. Apart from the many variants of implementation of DMFT, it relies on using an impurity solver as part of its algorithm. In this work, rather than solving a Hubbard model, we propose to explore the impurity solver itself for solving a problem of metallic host doped with correlated elements, commonly referred to as Anderson impurity model (AIM). We solve the model using the distributional exact diagonalisation method. Our particular aim is to show how the metal-insulator transition (MIT) occurs in the system and how the phenomenon reflects in its optical conductivity for various model parameters.
UR - http://www.scopus.com/inward/record.url?scp=85065657663&partnerID=8YFLogxK
U2 - 10.1088/1757-899X/515/1/012071
DO - 10.1088/1757-899X/515/1/012071
M3 - Conference article
AN - SCOPUS:85065657663
SN - 1757-8981
VL - 515
JO - IOP Conference Series: Materials Science and Engineering
JF - IOP Conference Series: Materials Science and Engineering
IS - 1
M1 - 012071
T2 - International Conference on Condensed Matters and Advanced Materials 2018, IC2MAM 2018
Y2 - 5 September 2018
ER -