Effect of fluctuations on the forced motion and interactions of domain walls in one-dimensional magnetic systems

1986 ◽  
Vol 65 (2) ◽  
pp. 209-223 ◽  
Author(s):  
Yuri S. Kivshar ◽  
V. V. Konotop ◽  
Yuri A. Sinitsyn
Keyword(s):  
Domain Walls ◽  
Magnetic Systems ◽  
One Dimensional ◽  
Forced Motion

scholarly journals One-dimensional in-plane edge domain walls in ultrathin ferromagnetic films

Nonlinearity ◽  
2018 ◽  
Vol 31 (3) ◽  
pp. 728-754 ◽  
Author(s):  
Ross G Lund ◽  
Cyrill B Muratov ◽  
Valeriy V Slastikov
Keyword(s):  
Domain Walls ◽  
One Dimensional ◽  
Ferromagnetic Films

Domain walls in one-dimensional 3-periodic structure

1997 ◽  
Vol 203 (1) ◽  
pp. 335-347 ◽  
Author(s):  
Takeshi Shigenari ◽  
Aleksey A. Vasiliev ◽  
Sergey V. Dmitriev ◽  
Kohji Abe
Keyword(s):  
Periodic Structure ◽  
Domain Walls ◽  
One Dimensional

Ground state of one-dimension repulsing particles on disordered lattice

2014 ◽  
Vol 25 (08) ◽  
pp. 1450028 ◽  
Author(s):  
L. A. Pastur ◽  
V. V. Slavin ◽  
A. A. Krivchikov
Keyword(s):  
Ground State ◽  
Domain Walls ◽  
Host Lattice ◽  
One Dimension ◽  
Weak Disorder ◽  
Interacting Particles ◽  
One Dimensional ◽  
Lattice Disorder ◽  
Disordered Lattice ◽  
The Mean

The ground state (GS) of interacting particles on a disordered one-dimensional (1D) host-lattice is studied by a new numerical method. It is shown that if the concentration of particles is small, then even a weak disorder of the host-lattice breaks the long-range order of Generalized Wigner Crystal (GWC), replacing it by the sequence of blocks (domains) of particles with random lengths. The mean domains length as a function of the host-lattice disorder parameter is also found. It is shown that the domain structure can be detected by a weak random field, whose form is similar to that of the ground state but has fluctuating domain walls positions. This is because the generalized magnetization corresponding to the field has a sufficiently sharp peak as a function of the amplitude of fluctuations for small amplitudes.

scholarly journals Nanoscale strain engineering of giant pseudo-magnetic fields, valley polarization, and topological channels in graphene

2020 ◽  
Vol 6 (19) ◽  
pp. eaat9488 ◽  
Author(s):  
C.-C. Hsu ◽  
M. L. Teague ◽  
J.-Q. Wang ◽  
N.-C. Yeh
Keyword(s):  
Magnetic Fields ◽  
Domain Walls ◽  
Quantum Hall ◽  
Strain Engineering ◽  
Scanning Tunneling ◽  
Monolayer Graphene ◽  
Tunneling Microscopy ◽  
One Dimensional ◽  
Valley Polarization ◽  
Topological States

The existence of nontrivial Berry phases associated with two inequivalent valleys in graphene provides interesting opportunities for investigating the valley-projected topological states. Examples of such studies include observation of anomalous quantum Hall effect in monolayer graphene, demonstration of topological zero modes in “molecular graphene” assembled by scanning tunneling microscopy, and detection of topological valley transport either in graphene superlattices or at bilayer graphene domain walls. However, all aforementioned experiments involved nonscalable approaches of either mechanically exfoliated flakes or atom-by-atom constructions. Here, we report an approach to manipulating the topological states in monolayer graphene via nanoscale strain engineering at room temperature. By placing strain-free monolayer graphene on architected nanostructures to induce global inversion symmetry breaking, we demonstrate the development of giant pseudo-magnetic fields (up to ~800 T), valley polarization, and periodic one-dimensional topological channels for protected propagation of chiral modes in strained graphene, thus paving a pathway toward scalable graphene-based valleytronics.

scholarly journals FERROELECTRIC LIQUID CRYSTALS: FROM THE PLANE WAVE TO THE MULTISOLITON LIMIT

1995 ◽  
Vol 09 (18n19) ◽  
pp. 2321-2362 ◽  
Author(s):  
I. MUŠEVIČ ◽  
B. ŽEKŠ ◽  
R. BLINC ◽  
TH. RASING
Keyword(s):  
Plane Wave ◽  
Domain Walls ◽  
Soft Mode ◽  
Dynamic Properties ◽  
Band Gaps ◽  
Collective Excitations ◽  
Ferroelectric Liquid Crystals ◽  
One Dimensional ◽  
Photonic Band ◽  
Reentrant Phases

In the presence of external fields or in restricted geometries, the originally continuous helical symmetry of the Sm C* phase is broken by the appearence of field- or geometry-induced soliton-like domain walls. As a result of this symmetry breaking, a crossover between the plane-wave-like and soliton-like regime occurs in both static and dynamic properties which is responsible for some remarkable phenomena such as field-induced optical biaxiality or a field-induced band structure of collective excitations. Whereas we find in the plane-wave-like regime a degenerate soft mode which splits below the Sm A→Sm C* transition into a symmetry recovering Goldstone-phason-mode and an amplitudon mode, we find in the soliton regime a splitting of the phason mode into acoustic and optic-like branches separated by a band gap. Within the same framework we also discuss other remarkable and extraordinary properties such as reentrant phases, Lifshitz points, one dimensional photonic band gaps and thickness dependent phase diagrams.

Theory of Photoinduced Phase Transitions: From Semiclassical to Quantum Aspects

2006 ◽  
Vol 112 ◽  
pp. 21-38
Author(s):  
Tetsuo Ogawa
Keyword(s):  
Phase Transitions ◽  
Excited States ◽  
Domain Walls ◽  
Particle Density ◽  
Structural Phase ◽  
Electron Hole ◽  
One Dimensional ◽  
First Order Phase Transition ◽  
New Material ◽  
First Order Phase

We review recent progress of theoretical studies for the photoinduced phase tran- sitions (PIPTs) to clarify what the PIPTs are. There are two types of the PIPTs: (a) global change via optically excited states and (b) new material phase creation in optically excited states. First, concerning (a), photoinduced structural phase transitions via excited electronic states are discussed using a minimal one-dimensional model composed of localized electrons and lattices. We show that the global structural change by photoexcitation only at a single site is possible under the adiabatic or diabatic approximation. This dynamics of the domain bound- aries (domain walls) is called the “photoinduced domino process,” which is the photoinduced nucleation in nonequilibrium first-order phase transition. Second, concerning (b), we discuss quantum orders of electron-hole (e-h) systems, which are optically excited states of insulators consisting of many electrons and holes in two bands. In particular, the “exciton Mott transi- tion,” i.e., the “from-insulator-to-metal” transition of the e-h systems as the particle density increases is introduced. We stress that this transition depends strongly on dimensionality of the system.

Effect of Low-Symmetric Spin Distribution on EPR Lines in One-Dimensional Magnetic Systems

1979 ◽  
Vol 46 (6) ◽  
pp. 1949-1950 ◽  
Author(s):  
Yuhei Natsume ◽  
Fumiyoshi Sasagawa ◽  
Masaaki Toyoda ◽  
Isao Yamada
Keyword(s):  
Spin Distribution ◽  
Magnetic Systems ◽  
One Dimensional
Sign in / Sign up

Export Citation Format

Share Document