scholarly journals Fine structure of the spectra of the Kondo lattice model: Two-site cellular dynamical mean-field theory study

2017 ◽  
Vol 95 (3) ◽  
Author(s):  
Žiga Osolin ◽  
Rok Žitko
Keyword(s):  
Field Theory ◽  
Fine Structure ◽  
Lattice Model ◽  
Mean Field Theory ◽  
Mean Field ◽  
Kondo Lattice ◽  
Dynamical Mean Field Theory ◽  
Kondo Lattice Model

scholarly journals Schwinger boson approach for the dynamical mean-field theory of the Kondo lattice

2021 ◽  
Vol 104 (24) ◽  
Author(s):  
Rulei Han ◽  
Danqing Hu ◽  
Jiangfan Wang ◽  
Yi-feng Yang
Keyword(s):  
Field Theory ◽  
Mean Field Theory ◽  
Mean Field ◽  
Kondo Lattice ◽  
Dynamical Mean Field Theory

Magnetic Response of Itinerant Spin Ice

SPIN ◽  
2015 ◽  
Vol 05 (02) ◽  
pp. 1540004 ◽  
Author(s):  
Masafumi Udagawa
Keyword(s):  
Low Temperatures ◽  
Magnetic Field Dependence ◽  
Mean Field Theory ◽  
Mean Field ◽  
Kondo Lattice ◽  
Dynamical Mean Field Theory ◽  
Magnetic Response ◽  
Magnetization Process ◽  
Spin Ice ◽  
Kondo Lattice Model

We have studied the magnetic response of itinerant spin ice, by applying the cluster dynamical mean field theory (CDMFT) to the Ising Kondo lattice model on a pyrochlore lattice. As a result, we found a characteristic interplay between magnetization curve and spin ice correlation developed at low temperatures. The magnetization develops a kink-like structure at the 2/3 of its saturation value, reminiscent of kagome ice plateau. Accompanied with the magnetization process, the monopole density shows nonmonotonic magnetic field dependence with a clear minimum, reflecting a subtle energetics of spin configurations. The spin ice correlation also affects the transport properties of the system, and brings about negative magnetoresistivity with its slope strongly dependent on the magnitude of spin ice correlation. We discuss these behaviors in comparison with the magnetic response observed in Pr 2 Ir 2 O 7.

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