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Article
Open AccessNonlinear Optical Response of an Excited 1/3 Laughlin Liquid
An ensemble of neutral excitations in a 1/3 Laughlin liquid is studied experimentally. It has been found that excitations induce a nonlinear optical response in the form of a quadratic dependence of the reflec...
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Article
Open AccessGiant Spatial Redistribution of Electrons in a Wide Quantum Well Induced by Quantizing Magnetic Field
In samples of field-effect transistors based on GaAs/AlGaAs heterostructures with an electron system in a single 50-nm-wide GaAs quantum well, a transition stimulated by a quantizing magnetic field has been de...
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Article
Open AccessObservation of electronic modes in open cavity resonator
The resemblance between electrons and optical waves has strongly driven the advancement of mesoscopic physics, evidenced by the widespread use of terms such as fermion or electron optics. However, electron wav...
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Article
Open AccessUnconventional Fractional Quantum Hall States in a Wide Quantum Well
A bilayer electron system that is formed in a 60-nm-wide GaAs quantum well and has a large difference of the electron densities in the layers has been studied. It has been found that, when a magnetic field is ...
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Article
Absorption of Microwave Radiation by Two-Dimensional Electron Systems Associated with the Excitation of Dimensional Bernstein Mode Resonances
The magnetic field dependence of the amplitudes of Shubnikov–de Haas oscillations in GaAs/AlGaAs heterostructure samples with a two-dimensional electron system irradiated by microwave radiation in the range of...
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Article
Magneto-Oscillations of the Charge of a Field-Effect Transistor That Are due to a Microwave-Induced Nonequilibrium Electron Energy Distribution
The observation of microwave-induced changes in the charge of a field effect transistor with a channel formed by a bilayer electron system has confirmed that microwave radiation induces a nonequilibrium electr...
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Article
Open AccessInvestigation of spin stiffness in spin-depolarized states of two-dimensional electron systems with time-resolved Kerr rotation
An experimental technique based on time-resolved Kerr rotation allows a comparison of the spin stiffnesses of different spin-polarized and depolarized states in a two-dimensional electron system. With this tec...
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Article
Quantum Effects in the Capacitance of Field-Effect Transistors with a Double Quantum Well
The compressibility of electrons in a bilayer electron system implemented in a GaAs double quantum well is investigated. Manifestations of the negative compressibility of a low-density two-dimensional electron...
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Article
Temperature Dependence of the Amplitude of Minima of Absorption of Microwave Radiation at Cyclotron Resonance Harmonics
The temperature dependence of microwave absorption minima observed at cyclotron resonance harmonics in a two-dimensional electron system implemented in a GaAs/AlGaAs heterostructure has been studied. The coexi...
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Article
Effect of Microwave Radiation on Quantum Magnetocapacitance Oscillations
The effect of microwave radiation on the amplitudes of the quantum magnetocapacitance oscillations in field-effect transistors has been studied. It has been found that the microwave-induced variation of the os...
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Article
Freezing of the Dynamics of Spontaneous Electric Field Domains in Microwave-Induced States with a Low Dissipation
The temperature dependence of the microwave photovoltage has been studied in microwave-induced states of a two-dimensional electron system, which are characterized by an almost dissipationless flow of a low-fr...
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Article
Dynamics of Spontaneous Electric Field Domains in a Two-Dimensional Electron System Irradiated by Microwaves and the Conductance of a Donor Layer
The temperature dependence of the switching frequency of a microwave-induced spontaneous electric field forming a domain structure and the conductance of a do** layer that provides electrons to the two-dimen...
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Article
Negative permittivity in bubble and stripe phases
The physics of itinerant electrons in condensed matter is by and large governed by repulsive Coulomb forces. However, attractive interactions may emerge and prevail in determining the ground state despite the ...
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Article
Open AccessThe local nature of incompressibility of quantum Hall effect
Since the experimental realization of the integer quantum Hall effect in a two-dimensional electron system, the interrelation between the conductance quantization and the topological properties of the system h...
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Article
Observation of the variations of the domain structure of a spontaneous electric field in a two-dimensional electron system under microwave irradiation
It has been found on a sample of the GaAs/AlGaAs heterostructure with the two-dimensional electron system that different configurations of domains of a spontaneous electric field are possible within one microw...
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Article
Open AccessObservation of interaction-induced modulations of a quantum Hall liquid’s area
Studies of electronic interferometers, based on edge-channel transport in the quantum Hall effect regime, have been stimulated by the search for evidence of abelian and non-abelian anyonic statistics of fracti...
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Article
Universal Fermi liquid crossover and quantum criticality in a mesoscopic system
Zero-temperature quantum phase transitions and their associated quantum critical points are believed to underpin the exotic finite-temperature behaviours of many strongly correlated electronic systems, but ide...
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Article
Robust electron pairing in the integer quantum hall effect regime
Electron pairing is a rare phenomenon appearing only in a few unique physical systems; for example, superconductors and Kondo-correlated quantum dots. Here, we report on an unexpected electron pairing in the i...
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Article
Open AccessSuppressing qubit dephasing using real-time Hamiltonian estimation
Unwanted interaction between a quantum system and its fluctuating environment leads to decoherence and is the primary obstacle to establishing a scalable quantum information processing architecture. Strategies...
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Article
Open AccessMulti-Valued Logic Gates based on Ballistic Transport in Quantum Point Contacts
Multi-valued logic gates, which can handle quaternary numbers as inputs, are developed by exploiting the ballistic transport properties of quantum point contacts in series. The principle of a logic gate that f...
