scholarly journals Strongly Correlated Materials from a Numerical Renormalization Group Perspective: How the Fermi-Liquid State of Sr2RuO4 Emerges

2020 ◽  
Vol 124 (1) ◽  
Author(s):  
Fabian B. Kugler ◽  
Manuel Zingl ◽  
Hugo U. R. Strand ◽  
Seung-Sup B. Lee ◽  
Jan von Delft ◽  
...  
Keyword(s):  
Renormalization Group ◽  
Liquid State ◽  
Fermi Liquid ◽  
Strongly Correlated ◽  
Numerical Renormalization Group ◽  
Strongly Correlated Materials

scholarly journals Tuning bad metal and non-Fermi liquid behavior in a Mott material: Rare-earth nickelate thin films

2015 ◽  
Vol 1 (10) ◽  
pp. e1500797 ◽  
Author(s):  
Evgeny Mikheev ◽  
Adam J. Hauser ◽  
Burak Himmetoglu ◽  
Nelson E. Moreno ◽  
Anderson Janotti ◽  
...  
Keyword(s):  
Fermi Liquid ◽  
Epitaxial Films ◽  
Strongly Correlated ◽  
Complex Phase ◽  
Strongly Correlated Materials ◽  
Liquid Phases ◽  
Liquid Behavior ◽  
Novel Devices ◽  
Shed Light ◽  
Fermi Liquid Behavior

Resistances that exceed the Mott-Ioffe-Regel limit (known as bad metal behavior) and non-Fermi liquid behavior are ubiquitous features of the normal state of many strongly correlated materials. We establish the conditions that lead to bad metal and non-Fermi liquid phases in NdNiO3, which exhibits a prototype bandwidth-controlled metal-insulator transition. We show that resistance saturation is determined by the magnitude of Ni egorbital splitting, which can be tuned by strain in epitaxial films, causing the appearance of bad metal behavior under certain conditions. The results shed light on the nature of a crossover to a non-Fermi liquid metal phase and provide a predictive criterion for Anderson localization. They elucidate a seemingly complex phase behavior as a function of film strain and confinement and provide guidelines for orbital engineering and novel devices.

RECENT PROGRESS IN THE DENSITY-MATRIX RENORMALIZATION GROUP

2007 ◽  
Vol 21 (13n14) ◽  
pp. 2564-2575 ◽  
Author(s):  
ULRICH SCHOLLWÖCK
Keyword(s):  
Renormalization Group ◽  
Density Matrix ◽  
Quantum Systems ◽  
Density Matrix Renormalization Group ◽  
Strongly Correlated ◽  
Powerful Method ◽  
Numerical Renormalization Group ◽  
One Dimensional ◽  
Density Matrix Renormalization ◽  
Quantum Impurity

Over the last decade, the density-matrix renormalization group (DMRG) has emerged as the most powerful method for the simulation of strongly correlated one-dimensional (1D) quantum systems. Input from quantum information has allowed to trace the method's performance to the entanglement properties of quantum states, revealing why it works so well in 1D and not so well in 2D; it has allowed to devise algorithms for time-dependent quantum systems and, by clarifying the link between DMRG and Wilson's numerical renormalization group (NRG), for quantum impurity systems.

scholarly journals Construction and solution of a Wannier-functions based Hamiltonian in the pseudopotential plane-wave framework for strongly correlated materials

2008 ◽  
Vol 65 (1) ◽  
pp. 91-98 ◽  
Author(s):  
Dm. Korotin ◽  
A. V. Kozhevnikov ◽  
S. L. Skornyakov ◽  
I. Leonov ◽  
N. Binggeli ◽  
...  
Keyword(s):  
Plane Wave ◽  
Strongly Correlated ◽  
Wannier Functions ◽  
Strongly Correlated Materials
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