Effective Hamiltonians for correlated narrow energy band systems and magnetic insulators: Role of spin-orbit interactions in metal-insulator transitions and magnetic phase transitions

2016 ◽  
Vol 144 (14) ◽  
pp. 144107 ◽  
Author(s):  
Subrata Chakraborty ◽  
Amrendra Vijay
Keyword(s):  
Phase Transitions ◽  
Energy Band ◽  
Magnetic Phase ◽  
Magnetic Phase Transitions ◽  
Spin Orbit ◽  
Metal Insulator ◽  
Magnetic Insulators ◽  
Spin Orbit Interactions ◽  
Effective Hamiltonians

scholarly journals Topological phase transition and charge-spin coupling in the kagome metal YMn6Sn6

2021 ◽  
Author(s):  
Peter Siegfried ◽  
Hari Bhandari ◽  
D Jones ◽  
Madhav Ghimire ◽  
Rebecca Dally ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Magnetic Phase ◽  
Spin Coupling ◽  
Magnetic Phase Transitions ◽  
Spin Orbit Coupling ◽  
Topological Phase ◽  
Spin Orbit ◽  
Topological Phase Transition ◽  
Lifshitz Transitions ◽  
Strong Spin

Abstract The Fermi surface (FS) is essential for understanding the properties of metals. It can change under both conventional symmetry-breaking phase transitions and Lifshitz transitions (LTs), where the FS, but not the crystal symmetry, changes abruptly. Magnetic phase transitions involving uniformly rotating spin textures are conventional in nature, requiring strong spin-orbit coupling (SOC) to influence the FS topology and generate measurable properties. LTs driven by a continuously varying magnetization are rarely discussed. Here we present two such manifestations in the magnetotransport of the kagome magnet YMn6Sn6; one caused by changes in the magnetic structure and another by a magnetization-driven LT. The former yields a 10% magnetoresistance enhancement without a strong SOC, while the latter a 45% reduction in the resistivity. These phenomena offer a unique view into the interplay of magnetism and electronic topology, crucial for understanding the rare-earth counterparts, such as TbMn6Sn6, recently shown to harbor novel correlated topological physics.

Metal-insulator and magnetic phase transitions: A thermodynamic model

1972 ◽  
Vol 10 (5) ◽  
pp. 455-458 ◽  
Author(s):  
L.M. Falicov ◽  
C.E.T. Gonçalves da Silva ◽  
B.A. Huberman
Keyword(s):  
Phase Transitions ◽  
Thermodynamic Model ◽  
Magnetic Phase ◽  
Magnetic Phase Transitions ◽  
Metal Insulator

Magnetic Phase Transitions in Nanosystems: Role of Size Effects, Intercluster Interactions and Defects

2003 ◽  
Vol 5 (5/6) ◽  
pp. 485-495 ◽  
Author(s):  
P. Suzdalev ◽  
V.N. Buravtsev ◽  
Yu.V. Maksimov ◽  
A.A. Zharov ◽  
V.K. Imshennik ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Size Effects ◽  
Magnetic Phase ◽  
Magnetic Phase Transitions
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