Thermal Entanglement Entropy Signature of Spin-Peierls Transition in Dimerized Isotropic XY Chain with Multi-Spin Interactions

2014 ◽  
Vol 1021 ◽  
pp. 46-51
Author(s):  
Hai Lin Huang ◽  
Lin Jie Ding ◽  
Zhao Yu Sun
Keyword(s):  
Green's Function ◽  
Finite Temperature ◽  
Function Theory ◽  
Critical Phenomenon ◽  
Entanglement Entropy ◽  
Spin Interaction ◽  
Thermal Entanglement ◽  
Spin Interactions ◽  
Wigner Transformation ◽  
Peierls Transition

The finite-temperature entanglement entropy for an alternating spin-1/2 chain with multi-spin interactions is investigated by means of Green’s function theory combined with Jordan-Wigner transformation, to identify the spin-Peierls (SP) transition. It is found that the two-site thermal entanglement entropy is a useful tool to characterize theSPtransition. In addition, the competition between multi-spin interaction and Peierls-dimerization plays a central role in the critical phenomenon of the system.

scholarly journals Symmetry mediated tunable molecular magnetism on a 2D material

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Yuqi Wang ◽  
Soroush Arabi ◽  
Klaus Kern ◽  
Markus Ternes
Keyword(s):  
Single Molecule ◽  
Twist Angle ◽  
Layered Material ◽  
Spin Interaction ◽  
Transition Metal Dichalcogenide ◽  
Nanoscale Structures ◽  
Reduced Dimensions ◽  
Spin Interactions ◽  
Metal Organic ◽  
Probe Microscope

AbstractSymmetries in nanoscale structures can be decisive for their structural, electronic, and magnetic properties, particularly in systems with reduced dimensions. Here we show that the symmetries of a flat metal-organic molecule adsorbed on a transition metal dichalcogenide, a 2-dimensional layered material, have a dramatic effect on the total spin and the intramolecular spin-spin interactions. Using a scanning probe microscope, we find two different molecular spin states by modifying the symmetry of the molecules via the twist angle to the substrate. Additionally, we observe significant non-collinear Dzyaloshinskii–Moriya interaction between two electron spins on the molecule induced by the spin-orbit coupling of the van der Waals coupled layered material with broken inversion symmetry. Our work opens a path for modifying the spin by exploiting symmetries and for studying the nature of surface-induced non-collinear spin-spin interaction within a single molecule which might allow the realization of more complex topological spin structures.

scholarly journals Green's Function Theory of Magnetic Relaxation. II

1963 ◽  
Vol 29 (5) ◽  
pp. 651-674 ◽  
Author(s):  
Motoyuki Tanaka ◽  
Kazuhisa Tomita
Keyword(s):  
Green’S Function ◽  
Green's Function ◽  
Magnetic Relaxation ◽  
Function Theory
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