scholarly journals Tunable Fermi surface topology and Lifshitz transition in bilayer graphene

2015 ◽  
Vol 210 ◽  
pp. 19-31 ◽  
Author(s):  
Anastasia Varlet ◽  
Marcin Mucha-Kruczyński ◽  
Dominik Bischoff ◽  
Pauline Simonet ◽  
Takashi Taniguchi ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Bilayer Graphene ◽  
Surface Topology ◽  
Lifshitz Transition ◽  
Fermi Surface Topology

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.

scholarly journals Controlling a Van Hove singularity and Fermi surface topology at a complex oxide heterostructure interface

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Ryo Mori ◽  
Patrick B. Marshall ◽  
Kaveh Ahadi ◽  
Jonathan D. Denlinger ◽  
Susanne Stemmer ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Quantum Confinement ◽  
Complex Oxide ◽  
Surface Topology ◽  
Chemical Doping ◽  
Lifshitz Transition ◽  
Band Insulator ◽  
Fine Control ◽  
Fermi Surface Topology ◽  
Oxide Heterostructure

AbstractThe emergence of saddle-point Van Hove singularities (VHSs) in the density of states, accompanied by a change in Fermi surface topology, Lifshitz transition, constitutes an ideal ground for the emergence of different electronic phenomena, such as superconductivity, pseudo-gap, magnetism, and density waves. However, in most materials the Fermi level, $${E}_{{\rm{F}}}$$EF, is too far from the VHS where the change of electronic topology takes place, making it difficult to reach with standard chemical doping or gating techniques. Here, we demonstrate that this scenario can be realized at the interface between a Mott insulator and a band insulator as a result of quantum confinement and correlation enhancement, and easily tuned by fine control of layer thickness and orbital occupancy. These results provide a tunable pathway for Fermi surface topology and VHS engineering of electronic phases.

Pressure-induced change of the Fermi surface topology in Al-based solid solutions

2003 ◽  
Vol 45 (12) ◽  
pp. 2213-2217 ◽  
Author(s):  
A. S. Mikhailushkin ◽  
É. I. Isaev ◽  
Yu. Kh. Vekilov ◽  
S. I. Simak
Keyword(s):  
Fermi Surface ◽  
Solid Solutions ◽  
Surface Topology ◽  
Fermi Surface Topology

scholarly journals Fermi surface topology and large magnetoresistance in the topological semimetal candidate PrBi

2019 ◽  
Vol 99 (24) ◽  
Author(s):  
Amit Vashist ◽  
R. K. Gopal ◽  
Divya Srivastava ◽  
M. Karppinen ◽  
Yogesh Singh
Keyword(s):  
Fermi Surface ◽  
Surface Topology ◽  
Topological Semimetal ◽  
Fermi Surface Topology

scholarly journals Transport signatures of Fermi surface topology change in BiTeI

2015 ◽  
Vol 91 (20) ◽  
Author(s):  
Linda Ye ◽  
Joseph G. Checkelsky ◽  
Fumitaka Kagawa ◽  
Yoshinori Tokura
Keyword(s):  
Fermi Surface ◽  
Surface Topology ◽  
Topology Change ◽  
Fermi Surface Topology

scholarly journals Fermi-surface topology of the heavy-fermion system Ce2PtIn8

2018 ◽  
Vol 97 (16) ◽  
Author(s):  
J. Klotz ◽  
K. Götze ◽  
E. L. Green ◽  
A. Demuer ◽  
H. Shishido ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Heavy Fermion ◽  
Surface Topology ◽  
Fermion System ◽  
Heavy Fermion System ◽  
Fermi Surface Topology

scholarly journals Large magnetoresistance and Fermi surface topology of PrSb

2017 ◽  
Vol 96 (12) ◽  
Author(s):  
F. Wu ◽  
C. Y. Guo ◽  
M. Smidman ◽  
J. L. Zhang ◽  
H. Q. Yuan
Keyword(s):  
Fermi Surface ◽  
Surface Topology ◽  
Fermi Surface Topology
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