scholarly journals Aspects of metallic low-temperature transport in Mott-insulator/band-insulator superlattices: Optical conductivity and thermoelectricity

2008 ◽  
Vol 77 (24) ◽  
Author(s):  
Andreas Rüegg ◽  
Sebastian Pilgram ◽  
Manfred Sigrist
Keyword(s):  
Low Temperature ◽  
Optical Conductivity ◽  
Mott Insulator ◽  
Band Insulator

scholarly journals Band-insulator–metal–Mott-insulator transition in the half-filledt−t′ionic Hubbard chain

2007 ◽  
Vol 75 (24) ◽  
Author(s):  
G. I. Japaridze ◽  
R. Hayn ◽  
P. Lombardo ◽  
E. Müller-Hartmann
Keyword(s):  
Mott Insulator ◽  
Insulator Transition ◽  
Band Insulator

scholarly journals Optical conductivity of one-dimensional doped Hubbard-Mott insulator

2002 ◽  
Vol 66 (7) ◽  
Author(s):  
D. N. Aristov ◽  
Vadim V. Cheianov ◽  
A. Luther
Keyword(s):  
Optical Conductivity ◽  
Mott Insulator ◽  
One Dimensional

Band and Percolation Approaches to Low Temperature Properties of Manganites

1998 ◽  
Vol 12 (29n31) ◽  
pp. 3349-3354
Author(s):  
Lev P. Gor'kov ◽  
Vladimir Z. Kresin
Keyword(s):  
Low Temperature ◽  
Parent Compound ◽  
Ferromagnetic Metal ◽  
Teller Effect ◽  
Antiferromagnetic Ordering ◽  
Ferromagnetic Layers ◽  
Band Insulator ◽  
Jahn Teller ◽  
Jahn Teller Effect

Properties of the parent compound, LaMnO3 are greatly affected by strong Hund's coupling. Assuming the antiferromagnetic ordering (with a low Neel temperture) along one of the cubic axes, this coupling would result in formation of disconnected ferromagnetic layers. Furthermore, in the presence of the cooperative Jahn–Teller effect the compound becomes a band insulator. At small doping ( La 1-x Ca x MnO 3, x ≪ 1) the band insulator phase coexists with the presence of localized holes. An insulator-ferromagnetic metal transition occurs at the percolation point x c =0.16.

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