Inversion of spin levels in exchange-coupled pairs under combined time reversal
Journal Title: Semiconductor Physics, Quantum Electronics and Optoelectronics - Year 2018, Vol 21, Issue 3
Abstract
The method for transforming antiferromagnetic exchange interaction into the ferromagnetic one has been proposed for binuclear coordination compounds, which contain dimers consisting of iron or rare earth ions with arbitrary spins and having identical electronic configurations. The method is based on the time-reversal symmetry violation at isomorphic substitution of one of dimer’s ions by a “time-reversed” ion, when the spin projection operators of only one of dimer’s ions are reversed. Restoration of broken symmetry accompanied by its transformation into combined time-reversal symmetry is caused by sign reversing of exchange interaction constant J at isomorphic substitution. Experimental data confirm the proposed way of inverting the sign of J. The method for controlled synthesis of binuclear coordination compounds using specific isomorphic substitutions with “time-reversed” ions allows extending the class of coordination compounds characterized by ferromagnetic exchange interaction.
Authors and Affiliations
I. I. Geru
Keywords
Related Articles
- EP ID EP416028
- DOI 10.15407/spqeo21.03.238
- Views 85
- Downloads 0
Preparation and study of porous Si surfaces obtained using the electrochemical method
Review of original results concerning electrochemical formation of porous Si layers and investigation of properties inherent to the formed layers has been presented. The results related with observation of changes in p...
Impact of semiconductor quantum dots bandgap on reabsorption in luminescent concentrator
We have investigated the influence of the average radius and its dispersion of the semiconductor quantum dots (QDs) used in luminescent solar concentrators (LSCs) on reabsorption. To minimize the detrimental reabsorption...
Low doses effect in GaP light-emitting diodes
The paper is devoted to the electrophysical characteristics study of serial red and green GaP light-emitting diodes (LEDs) irradiated with low α-particles doses (Φ ≤ 1012 cm–2). It was stated that radiation features of p...
Speckle pattern formation in spatially limited optical systems
The dependences of statistical parameters inherent to speckle patterns on the object roughness and aperture size have been investigated. The experimental results that confirm theoretical dependence quality within the lim...
Nanograin boundaries and silicon carbide photoluminescence
The luminescence spectra of SiC crystals and films with grain boundaries (GB) on the atomic level were observed. The GB spectra are associated with luminescence centers localized in areas of specific structural abnormali...