scholarly journals Wigner Crystal and Colossal Magnetoresistance in InSb Doped with Mn

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
S. A. Obukhov ◽  
S. W. Tozer ◽  
W. A. Coniglio
Keyword(s):  
Colossal Magnetoresistance ◽  
Wigner Crystal

Pressure-tuned colossal magnetoresistance effect in n-type CdCr2Se4

2021 ◽  
Vol 118 (26) ◽  
pp. 262407
Author(s):  
Bowen Zhang ◽  
Chuanchuan Gu ◽  
Chao An ◽  
Xuliang Chen ◽  
Yonghui Zhou ◽  
...  
Keyword(s):  
Colossal Magnetoresistance ◽  
Magnetoresistance Effect ◽  
Colossal Magnetoresistance Effect

scholarly journals Interaction-driven transition between the Wigner crystal and the fractional Chern insulator in topological flat bands

2021 ◽  
Vol 104 (8) ◽  
Author(s):  
Michał Kupczyński ◽  
Błażej Jaworowski ◽  
Arkadiusz Wójs
Keyword(s):  
Wigner Crystal ◽  
Flat Bands

scholarly journals The quantum Hall effect in the absence of disorder

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Kyung-Su Kim ◽  
Steven A. Kivelson
Keyword(s):  
Magnetic Field ◽  
Hall Effect ◽  
Quantum Hall Effect ◽  
Finite Interval ◽  
Quantum Hall ◽  
Wigner Crystal ◽  
Quasi Particle ◽  
Hall Conductance ◽  
Finite Extent

AbstractIt is widely held that disorder is essential to the existence of a finite interval of magnetic field in which the Hall conductance is quantized, i.e., for the existence of “plateaus” in the quantum Hall effect. Here, we show that the existence of a quasi-particle Wigner crystal (QPWC) results in the persistence of plateaus of finite extent even in the limit of vanishing disorder. Several experimentally detectable features that characterize the behavior in the zero disorder limit are also explored.

scholarly journals Ultrafast dynamical Lifshitz transition

2021 ◽  
Vol 7 (17) ◽  
pp. eabd9275
Author(s):  
Samuel Beaulieu ◽  
Shuo Dong ◽  
Nicolas Tancogne-Dejean ◽  
Maciej Dendzik ◽  
Tommaso Pincelli ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Colossal Magnetoresistance ◽  
Surface Topology ◽  
Strongly Correlated ◽  
Many Body ◽  
Time Resolved ◽  
Weyl Semimetal ◽  
Lifshitz Transition ◽  
Fermi Surface Topology ◽  
Many Body Systems

Fermi surface is at the heart of our understanding of metals and strongly correlated many-body systems. An abrupt change in the Fermi surface topology, also called Lifshitz transition, can lead to the emergence of fascinating phenomena like colossal magnetoresistance and superconductivity. While Lifshitz transitions have been demonstrated for a broad range of materials by equilibrium tuning of macroscopic parameters such as strain, doping, pressure, and temperature, a nonequilibrium dynamical route toward ultrafast modification of the Fermi surface topology has not been experimentally demonstrated. Combining time-resolved multidimensional photoemission spectroscopy with state-of-the-art TDDFT+U simulations, we introduce a scheme for driving an ultrafast Lifshitz transition in the correlated type-II Weyl semimetal Td-MoTe2. We demonstrate that this nonequilibrium topological electronic transition finds its microscopic origin in the dynamical modification of the effective electronic correlations. These results shed light on a previously unexplored ultrafast scheme for controlling the Fermi surface topology in correlated quantum materials.

Sign in / Sign up

Export Citation Format

Share Document