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June 25, 2026
HSE Researchers Make Aldehydes Perform Dual Function
Chemists from HSE University have discovered a way to carry out a reductive addition reaction without using an external reducing agent. Instead, the required 'resource' is supplied by the aldehyde itself, one of the reaction participants. This approach helps prevent unwanted side reactions, reduces toxicity, and simplifies the production and synthesis of organic molecules, including those used in the manufacture of medicines. The study has been published in Journal of Catalysis.
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Electron pairing with gapless excitations in mixed double layers

Physical Review B: Condensed Matter and Materials Physics. 2021. Vol. 104. No. 24. Article 245124.
Sinner A., Lozovik Y., Ziegler K.

We study the interlayer pairing states in layered systems of two different 2d electronic subsystems, one with relativistic linear and the other with nonrelativistic parabolic spectrum. The complex order parameter of the paired state has a two-component structure. We investigate the pairing state formation on the mean-field level, determine the critical interaction strength and evaluate the effective potential. The anisotropic three-band spectrum of quasiparticles depends explicitly on the phase difference of the order parameter components, rotates in momentum space as it changes, and exhibits the strong band deformation due to the pairing. The pairing leads to the fusion and hybridization of initially decoupled bands. The quasiparticle spectrum has the shape of deformed Dirac cones in the vicinity of the two touching points between neighboring bands. The density of states exhibits a number of specific features due to band deformation, such as a van Hove singularity.

Research target: Physics
Language: English
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Keywords: grapheneграфенheterostructuresгетероструктурыelectron-hole pairingэлектрон-дырочное спаривание
Publication based on the results of:
Mathematical modeling of transfer processes in complex physical systems, including quantum ones (2021)
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