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Chiral-induced unidirectional spin-to-charge conversion.
Sci Adv
January 2025
Institute of Physics, Johannes Gutenberg University Mainz, Mainz 55128, Germany.
The observation of spin-dependent transmission of electrons through chiral molecules has led to the discovery of chiral-induced spin selectivity (CISS). The remarkably high efficiency of the spin polarizing effect has recently gained substantial interest due to the high potential for future sustainable hybrid chiral molecule magnetic applications. However, the fundamental mechanisms underlying the chiral-induced phenomena remain to be understood fully.
View Article and Find Full Text PDFWhy Mixed Halides in 2D Chiral Perovskites Weaken Chirality-Induced Spin Selectivity.
ACS Nano
December 2024
School of Physical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India.
2D Ruddlesden-Popper (RP) perovskites, upon inclusion of a chiral amine, exhibit chirality-induced spin selectivity (CISS). Although alloying at the halogen site in MBA-based RPs (MBA: methylbenzylammonium) is one of the suitable routes to tune the CISS effect, the mixed-halide RP perovskites exhibited complete suppression of chirality when probed through circular dichroism (CD). Here, we present the CISS effect in a series of mixed-halide RP perovskites.
View Article and Find Full Text PDFUnveiling the impact of Ni doping on the structural, electronic, and magnetic properties of nanocrystalline FeCoOspinel oxide: a combined experimental andinvestigations.
J Phys Condens Matter
December 2024
Department of Physics, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
Article Synopsis
- The study synthesizes nanocrystalline samples of NixFe1-xCo2O4 at varying nickel concentrations via co-precipitation and annealing at 900 °C, revealing different crystallization phases and decreased particle size with more nickel substitution.
- Magnetic properties were analyzed, showing metamagnetic transitions in certain samples and dynamic susceptibility dependent on both nickel content and temperature, indicating complex magnetic states like spin-glass freezing.
- First principles density functional theory calculates suggest these materials exhibit ferrimagnetic and insulating behaviors, with potential applications in spintronics due to their distinctive electronic structures and spin-dependent characteristics.
Experimental observation of spin Hall effect of light using compact weak measurements.
Nanophotonics
August 2024
School of Mechanical Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea.
The spin Hall effect of light, a phenomenon characterized by the transverse and spin dependent splitting of light at an optical interface, is highly promising for collecting precise quantitative data from interfaces and stands as an appealing option for improving precision metrology. This high level of precision is attributed to the principles of weak measurement. Since its conceptual introduction, the spin Hall effect of light has been empirically observed through weak measurement techniques, adhering closely to the initially proposed experimental configuration.
View Article and Find Full Text PDFSearches for exotic spin-dependent interactions with spin sensors.
Rep Prog Phys
December 2024
CAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
Numerous theories have postulated the existence of exotic spin-dependent interactions beyond the Standard Model of particle physics. Spin-based quantum sensors, which utilize the quantum properties of spins to enhance measurement precision, emerge as powerful tools for probing these exotic interactions. These sensors encompass a wide range of technologies, such as optically pumped magnetometers, atomic comagnetometers, spin masers, nuclear magnetic resonance, spin amplifiers, and nitrogen-vacancy centers.
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