Quantum-Interference Effect on AC Transport of Electrons subject to Long-Range Random Magnetic Fields
スポンサーリンク
概要
- 論文の詳細を見る
We numerically study the spatial profiles of wavefunctions and the frequency dependences of the ac conductivity σ(ω) for two-dimensional electron systems subject to long-range random magnetic fields (RMF) with zero mean. It is found, for a weak RMF, that amplitudes of the wavefunction are almost uniformly distributed over the system, and the ac conductivity is described by the Drude theory. Under a strong RMF, quantum states corresponding to classical snake trajectories can be strongly localized, which implies that the quantum interference along zero magnetic field contours is crucial for understanding electron transport. In this case, the conductivity σ(ω) rapidly increases in the frequency regime lower than a crossover frequency ωc and decreases linearly for ω≫ωc. The crossover frequency is governed by the localization length of the electron eigenstate at the Fermi energy.
- Physical Society of Japanの論文
- 2001-09-15
著者
-
Yakubo Kousuke
Department Of Applied Physics Graduate School Of Engineering Hokkaido University
-
Nakayama Tsuneyoshi
Department Of Applied Phusics Faculty Of Engineering Hokkaido University
-
Shima Hiroyuki
Department Of Applied Physics Hokkaido University
-
Shima Hiroyuki
Department of Applied Physics, Hokkaido University, Sapporo 060-8628
-
Nakayama Tsuneyoshi
Department of Applied Physics, Hokkaido University, Sapporo 060-8628
関連論文
- Anomalous Size Dependence of Inverse Participation Ratio of Eigenfunctions in Graded Elastic Lattices(Condensed matter: structure and mechanical and thermal properties)
- Variety of Normal Modes and Their Transition Behaviors in Graded Elastic Networks : Square Networks with a Diagonal Gradient(Condensed matter: structure and mechanical and thermal properties)
- Fractons in Percolation Clusters : II. LOW TEMPERATURE PROPERTIES OF SOLIDS : Miscellaneous : Phonon, Structure etc.
- Numerical Achievement of Strong Localization of Light in Optical Waveguides with Aperiodic Grating
- Dynamic Structure Factor and Single-Length Scaling for Random Fractals
- Conductance Cusp of a Driven Mesoscopic Ring : Condensed Matter: Electronic Properties, etc.
- Kapitza Resistance between Sintered Metal Particles and ^3He-^4He Mixture : I. QUANTUM LIQUIDS AND SOLIDS : Interfaces of He
- Analysis of a New Method for Finding Eigenmodes of Very Large Lattice Systems
- Numerical Study of Electron Transport in Coherently Driven Double-Barrier Systems : Condensed Matter: Electronic Properties, etc.
- Finite-Time Scaling Approach for the ac Conductivity near the Anderson Transition
- Distribution of Fluctuating Fractal Dimensions of Finite Critical Systems
- Transfer Matrix Approach to Quantum Transport in a Driven Mesoscopic Ring
- Low-Temperature Anomalies of Crystalline Ge With O-Impurities(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
- Spin-Wave Dynamics of Percolating Heisenberg Antiferromagnets
- Spectral Dimension of Percolating Heisenberg Antiferromagnets
- Localization Exponents of Waves in Percolation Systems
- Two-Dimensional Electrons in a Random Magnetic Field with a Finite Mean Value
- Direct Observation of Localized Fractons Excited on Percolating Nets
- Crossover Behavior from Vector to Scalar Fractons in the Density of States of Percolating Networks
- Transfer Matrix Approach to Photon-Assisted Quantum Transport in Quantum Point Contacts
- Transfer-Matrix Formalism for 2D Quantum Transport in Long-Range Inhomogeneous Magnetic Fields
- Quantum-Interference Effect on AC Transport of Electrons subject to Long-Range Random Magnetic Fields
- Characteristics of Fractons: from Specific Realizatioons to Ensemble Averages
- A Valence Force-Field Treatment of the Lattice Dynamics of Tellurium
- Magnetic versus Nonmagnetic Mechanism for Thermal Boundary Conductances at Millikelvin Temperatures
- Molecular Dynamics Approach to the Mode Analysis of Optical Waveguides
- Molecular-Dynamics Calculations of Two-Dimensional Sine-Gordon Lattice
- Thermodynamic Properties of Anisotropic Two-Dimensional Sine-Gordon Lattice:Molecular-Dynamics Calculations
- A Modified Valence Force Field Approach to Lattice Dynamics of Trigonal Selenium
- Two-Dimensional Sine-Gordon Lattice with Fixed Winding Number:A Molecular-Dynamics Study
- Elastic Vibrations of Fractal Networks
- Effect of Oxygen Stoichiometry for Anisotropic Structural Change in Oriented YBa_2Cu_3O_x : Electrical Properties Condensed Matter
- Bond-Orientational Order of Two-Dimensional Colloidal Crystal
- Computer-Simulated Scattering of Lattice Solitons from Impurity at Free Boundary
- Reversible Cluster-Cluster Aggregation and Colloidal Gels
- Applicability of a Valence Force Field Model to the Lattice Vibrations of Trigonal Selenium
- The Forced Oscillator Method and the Kubo Formula
- Energy Relaxation in Damped Two-Dimensional Graded Elastic Lattices
- Bond-Orientational Order of Two-Dimensional Colloidal Crystal
- Anderson Transition in 3D Systems : The Finite-Time Scaling Approach to Dynamic Conductivity
- Microscopic Buckling and Low-Energy Dynamics in Glasses
- Quantification of Superiority of Broad-Buffer Diodes
- Testing the Order Parameter of the Anderson Transition
- Quantum-Interference Effect on AC Transport of Electrons subject to Long-Range Random Magnetic Fields
- Fluctuations of the Order Parameter in Critical Complex Networks
- Photon-Assisted ac Transport through Quantum Dots
- Sideband Quenching in a Driven Double-Barrier System —Scaling Behavior for Inhomogeneous Potentials—
- Transfer-Matrix Formalism for 2D Quantum Transport in Long-Range Inhomogeneous Magnetic Fields