نتایج جستجو برای: landau
تعداد نتایج: 13220 فیلتر نتایج به سال:
We consider magnetic oscillations due to Landau quantization in the mixed state of type-II superconductors. Our work is based on a previously developed formalism which allows the mean-field gap equations of the Abrikosov state to be conveniently solved in a Landau level representation. We find that the quasiparticle band structure changes qualitatively when the pairing selfenergy becomes compar...
The theories of Lev Davidovich Landau built the backbone of 20th-century condensed-matter physics. They described superfluidity, tenets of superconductivity, and diverse corners of astrophysics, particle physics and many other disciplines. To this day, Landau levels, Landau diamagnetism, Landau spectrum, Landau-Ginzburg theory and other Landau discoveries remain essential tools. His texts taugh...
We consider a quantum Hall system of electrons confined to the uppermost Landau level and assume that the lower Landau levels are full and inert causing no Landau level mixing. While it is known that the problem of electrons interacting with the Coulomb interaction in a higher Landau level is mathematically equivalent to the problem of electrons in the lowest Landau level interacting with an ef...
دراین مقاله با اعمال آزمون های گوناگون مبتنی بر نظریه کنترل و نیز آزمون های landauبر پایه نظریه معیار کنترل به بررسی ساخت های کنترلی می پردازیم. داده های زبان فارسی حاکی از آن است که آزمون های کنترل Landau با زبان فارسی سازگار است ولی آزمون های HornStein چنین سازگاری را نشان نمی دهد. به دیگر سخن، نظریه اخیر در زبان فارسی تایید نمیشود.
The London free-energy is regeneralized by the Ginsburg-Landau free-energy density in the presence of both d and s order parameters. We have shown that the strength of the s-d coupling, makes an important rule to determine the form of the lattice vortex. Appearance of the ratios of the coherence length to penetration depth in the higher order corrections of the free-energy density will trunca...
Considering a temperature dependent two-level quantum system, we have numerically solved the Landau-Zener transition problem. The method includes the incorporation of temperature effect as a thermal noise added Schrödinger equation for the construction of the Hamiltonian. Here, the obtained results which describe the changes in the system including the quantum states and the transition pro...
The fractional quantum Hall effect is a canonical example of electron-electron interactions producing new ground states in many-body systems. Most fractional quantum Hall studies have focussed on the lowest Landau level, whose fractional states are successfully explained by the composite fermion model. In the widely studied GaAs-based system, the composite fermion picture is thought to become u...
The microwave-photoexcited high mobility GaAs/AlGaAs two-dimensional electron system exhibits an oscillatory-magnetoresistance with vanishing resistance in the vicinity of magnetic fields B = [4/(4j + 1)]Bf , where Bf = 2πfm ∗/e, m∗ is an the effective mass, e is the charge, f is the microwave frequency, and j =1,2,3... Here, we report transport with well-resolved Landau levels, and some transm...
دراین مقاله با اعمال آزمون های گوناگون مبتنی بر نظریه کنترل و نیز آزمون های landauبر پایه نظریه معیار کنترل به بررسی ساخت های کنترلی می پردازیم. داده های زبان فارسی حاکی از آن است که آزمون های کنترل landau با زبان فارسی سازگار است ولی آزمون های hornstein چنین سازگاری را نشان نمی دهد. به دیگر سخن، نظریه اخیر در زبان فارسی تایید نمیشود.
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