2k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Russian Academy of SciencesRU151 papers
- University of TrentoIT90 papers
- National Research University Higher School of EconomicsRU47 papers
- Moscow Institute of Physics and TechnologyRU45 papers
- ETH ZurichCH32 papers
- Istituto Nazionale per la Fisica della MateriaIT27 papers
- Laboratory for Solid State PhysicsCH26 papers
- Institute of PhysicsPL22 papers
- Landau Institute for Theoretical PhysicsRU20 papers
- A.V. Shubnikov Institute of CrystallographyRU17 papers
- Technion – Israel Institute of TechnologyIL16 papers
- University of AugsburgDE16 papers
41 papers · 1 filter
Squeezed Vibrational States in Superfluid Helium
Lev A. Melnikovsky
Ultrafast birefringence oscillations observed in superfluid helium provide evidence for anisotropic quantum squeezing of quasiparticle pairs. The measured response is a superpositi…
Vortices in Andreev-Bashkin Superfluids
L. A. Melnikovsky
Andreev-Bashkin entrainment makes the hydrodynamics of the binary superfluid solution particularly interesting. We investigate stability and motion of quantum vortices in such syst…
Overcritical Fermi Superfluids
A. F. Andreev, L. A. Melnikovsky
Superfluidity in Fermi systems is not destroyed by a flow exceeding the Landau velocity threshold. The overcritical state acquires normal component even at zero temperature. We exp…
Transport of bound quasiparticle states in a two-dimensional boundary superfluid
S. Autti, R. P. Haley, A. Jennings +8
The B phase of superfluid 3He can be cooled into the pure superfluid regime, where the thermal quasiparticle density is negligible. The bulk superfluid is surrounded by a quantum w…
Observation of a Jump Like Transition from Fast to Normal Kinetics of Facets for Free Growing Helium Crystals
V. L. Tsymbalenko
The growth kinetics is studied of free-growing helium crystals within the temperature range 0.5-0.83 K and supersaturations to 10 mbar. For the pressure supersaturations above 0.5…
Oscillating nematic aerogel in superfluid 3He
V. V. Dmitriev, M. S. Kutuzov, A. A. Soldatov +2
We present experiments on nematic aerogel oscillating in superfluid He. This aerogel consists of nearly parallel mullite strands and is attached to a vibrating wire moving alon…
Observation of the "burst-like growth" regime for the He crystals nucleated in a metastable liquid
V. L. Tsymbalenko
The "burst-like growth" regime is observed for the He crystals with the growth defects. The observation has confirmed the hypothesis for the same physical mechanisms responsibl…
Dynamics of a He quantum crystal in the superfluid liquid
V. L. Tsymbalenko
The motion of helium crystals has been experimentally studied when the crystals fall in the superfluid liquid owing to gravity at temperatures above the roughening transitions wher…
Fundamental dissipation due to bound fermions in the zero-temperature limit
S. Autti, R. P. Haley, A. Jennings +7
The ground state of a fermionic condensate is well protected against perturbations in the presence of an isotropic gap. Regions of gap suppression, surfaces and vortex cores which…
Performance of adiabatic melting as a method to pursue the lowest possible temperature in He and He-He mixture at the He crystallization pressure
T. S. Riekki, A. P. Sebedash, J. T. Tuoriniemi
We studied a novel cooling method, in which He and He are mixed at the He crystallization pressure at temperatures below . We describe the experimenta…
Superfluid 3He in squeezed nematic aerogel
V. V. Dmitriev, M. S. Kutuzov, A. A. Soldatov +1
We present results of nuclear magnetic resonance (NMR) experiments in superfluid 3He in two samples of nematic aerogel consisting of nearly parallel mullite strands. The samples we…
Thermal conductivity of superfluid He-B in a tubular channel down to 0.1 at the He crystallization pressure
T. S. Riekki, J. T. Tuoriniemi, A. P. Sebedash
We studied the thermal conductivity of superfluid He in a 2.5 mm effective diameter and 0.15 m long channel connecting the two volumes of our experimental assembly. The main vo…
NMR shifts in He in aerogel induced by demagnetizing fields
V. V. Dmitriev, M. S. Kutuzov, A. A. Soldatov +1
Magnetic materials generate demagnetizing field that depends on geometry of the sample and results in a shift of magnetic resonance frequency. This phenomenon should occur in porou…
Spin diffusion in liquid He confined in planar aerogel
V. V. Dmitriev, M. S. Kutuzov, L. A. Melnikovsky +3
We report the results of theoretical and experimental investigation of spin diffusion in the normal phase of liquid He confined in planar aerogel: a material consisting of nano…
Effects of He film on quartz tuning forks in He at ultra-low temperatures
T. S. Riekki, J. Rysti, J. T. Mäkinen +3
In pure superfluid He-B at ultra-low temperatures, quartz tuning fork oscillator response is expected to saturate when the dissipation caused by the superfluid medium becomes s…
Half-quantum vortices and walls bounded by strings in the polar-distorted phases of topological superfluid He
J. T. Mäkinen, V. V. Dmitriev, J. Nissinen +5
Symmetries of the physical world have guided formulation of fundamental laws, including relativistic quantum field theory and understanding of possible states of matter. Topologica…
Bose-Einstein condensation of magnons and spin superfluidity in the polar phase of He
S. Autti, V. V. Dmitriev, J. T. Mäkinen +5
The polar phase of He, which is topological spin-triplet superfluid with the Dirac nodal line in the spectrum of Bogolubov quasiparticles, has been recently stabilized in a nan…
Interaction of two magnetic resonance modes in polar phase of superfluid 3He
V. V. Dmitriev, A. A. Soldatov, A. N. Yudin
We report results of low frequency nuclear magnetic resonance (NMR) experiments in the superfluid polar phase of 3He which is stabilized by a new type of "nematic" aerogel - nafen.…
Observation of half-quantum vortices in topological superfluid 3He
S. Autti, V. V. Dmitriev, J. T. Mäkinen +5
One of the most sought-after objects in topological quantum matter systems is a vortex carrying half a quantum of circulation. They were originally predicted to exist in superfluid…
Anomaly of the Internal Friction in the Helium Crystals Grown in the Burst-like Growth Mode
V. L. Tsymbalenko
The internal friction in the crystals grown in two modes, namely, slow and anomalously fast (burst-like growth) modes, is measured in the temperature range 0.49-0.75K at a frequenc…
Josephson Effect in Coherent Roton Aggregates
Lev A. Melnikovsky
A microwave electromagnetic field can excite a coherent roton aggregate in liquid helium around a dielectric resonator. We show that multiple coherent aggregates are excited simult…
Study of the 4He crystal surface
K. O. Keshishev, V. I. Marchenko, D. B. Shemyatikhin
The evolution of the meniscus of a helium crystal near the (0001) face is traced during a change in the boundary conditions at the chamber wall in the temperature range 0.5-0.9 K.…
Roton Parametric Resonance
L. A. Melnikovsky
Parametric excitation of rotons by oscillating electric field exhibits a narrow resonance at the roton minimum frequency. The resonance width is in good agreement with experimental…
Tunnelling defect nanoclusters in hcp 4He crystals: alternative to supersolidity
A. F. Andreev
A simple model based on the concept of resonant tunnelling clusters of lattice defects is used to explain the low temperature anomalies of hcp 4He crystals (mass decoupling from a…