scholarly journals Topology- and symmetry-protected domain wall conduction in quantum Hall nematics

2019 ◽  
Vol 100 (16) ◽  
Author(s):  
Kartiek Agarwal ◽  
Mallika T. Randeria ◽  
A. Yazdani ◽  
S. L. Sondhi ◽  
S. A. Parameswaran
Keyword(s):  
Domain Wall ◽  
Quantum Hall ◽  
Symmetry Protected ◽  
Protected Domain

scholarly journals Localized NMR Mediated by Electrical-Field-Induced Domain Wall Oscillation in Quantum-Hall-Ferromagnet Nanowire

Nano Letters ◽  
2016 ◽  
Vol 16 (3) ◽  
pp. 1596-1601 ◽  
Author(s):  
S. Miyamoto ◽  
T. Miura ◽  
S. Watanabe ◽  
K. Nagase ◽  
Y. Hirayama
Keyword(s):  
Domain Wall ◽  
Quantum Hall ◽  
Electrical Field ◽  
Wall Oscillation

scholarly journals Tunable Topological Surface States of Three-Dimensional Acoustic Crystals

2021 ◽  
Vol 9 ◽  
Author(s):  
Hua-Shan Lai ◽  
Yu-Li Xu ◽  
Bo He ◽  
Xiao-Chen Sun ◽  
Cheng He ◽  
...  
Keyword(s):  
Domain Wall ◽  
Mirror Symmetry ◽  
Three Dimensional ◽  
Surface States ◽  
Building Blocks ◽  
Quantum Spin ◽  
Quantum Spin Hall Effect ◽  
Breaking Mechanism ◽  
Symmetry Protected ◽  
Complete Bandgap

Topological design for band structures of artificial materials such as acoustic crystals provides a powerful tool to manipulate wave propagating in a robust and symmetry-protected way. In this paper, based on the band folding and breaking mechanism by building blocks with acoustic atoms, we construct a three-dimensional topological acoustic crystal with a large complete bandgap. At a mirror-symmetry domain wall, two gapped symmetry and anti-symmetry surface states can be found in the bandgap, originated from two opposite Su-Schrieffer-Heeger chains. Remarkably, by enforcing a glide symmetry on the domain wall, we can tune the original gapped surface states in a gapless fashion at the boundaries of surface Brillouin zone, acting as omnidirectional acoustic quantum spin Hall effect. Our tunable yet straightforward acoustic crystals offer promising potentials in realizing future topological acoustic devices.

scholarly journals Helicity-Protected Domain-Wall Magnetoresistance in Ferromagnetic Weyl Semimetal

2018 ◽  
Vol 87 (7) ◽  
pp. 073707 ◽  
Author(s):  
Koji Kobayashi ◽  
Yuya Ominato ◽  
Kentaro Nomura
Keyword(s):  
Domain Wall ◽  
Weyl Semimetal ◽  
Protected Domain

scholarly journals Wigner solids of domain wall skyrmions

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Kaifeng Yang ◽  
Katsumi Nagase ◽  
Yoshiro Hirayama ◽  
Tetsuya D. Mishima ◽  
Michael B. Santos ◽  
...  
Keyword(s):  
Domain Wall ◽  
Ground State ◽  
Particle Physics ◽  
Condensed Matter ◽  
Quantum Hall ◽  
Coulomb Interactions ◽  
Equilibrium Conditions ◽  
Topological Excitations ◽  
Alternative Approach

AbstractDetection and characterization of a different type of topological excitations, namely the domain wall (DW) skyrmion, has received increasing attention because the DW is ubiquitous from condensed matter to particle physics and cosmology. Here we present experimental evidence for the DW skyrmion as the ground state stabilized by long-range Coulomb interactions in a quantum Hall ferromagnet. We develop an alternative approach using nonlocal resistance measurements together with a local NMR probe to measure the effect of low current-induced dynamic nuclear polarization and thus to characterize the DW under equilibrium conditions. The dependence of nuclear spin relaxation in the DW on temperature, filling factor, quasiparticle localization, and effective magnetic fields allows us to interpret this ground state and its possible phase transitions in terms of Wigner solids of the DW skyrmion. These results demonstrate the importance of studying the intrinsic properties of quantum states that has been largely overlooked.

scholarly journals Manipulation of a Nuclear Spin by a Magnetic Domain Wall in a Quantum Hall Ferromagnet

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
M. Korkusinski ◽  
P. Hawrylak ◽  
H. W. Liu ◽  
Y. Hirayama
Keyword(s):  
Domain Wall ◽  
Nuclear Spin ◽  
Quantum Hall ◽  
Magnetic Domain ◽  
Magnetic Domain Wall
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