Fermi-Surface Topology Changes in In Alloys Deduced from the Behavior ofTcunder Strain

1971 ◽  
Vol 3 (11) ◽  
pp. 3765-3768 ◽  
Author(s):  
D. R. Overcash ◽  
M. J. Skove ◽  
E. P. Stillwell
Keyword(s):  
Fermi Surface ◽  
Surface Topology ◽  
Topology Changes ◽  
Fermi Surface Topology

CARRIER-MEDIATED EXCHANGE COUPLING AND FERMI SURFACE TOPOLOGY

2008 ◽  
Vol 22 (01n02) ◽  
pp. 88-93 ◽  
Author(s):  
WEN-MIN HUANG ◽  
HSIN-HUA LAI ◽  
CHENG-HUNG CHANG ◽  
HSIU-HAU LIN
Keyword(s):  
Fermi Surface ◽  
Thin Layer ◽  
Exchange Coupling ◽  
Magnetic Interaction ◽  
Surface Topology ◽  
Rashba Interaction ◽  
Topology Changes ◽  
Potential Applications ◽  
Effective Exchange ◽  
Fermi Surface Topology

We investigate the carrier-mediated exchange coupling between two ferromagnets, sandwiching an intermediate thin layer with Rashba interaction. The effective exchange coupling is obtained by integrating out the itinerant carriers. It turns out that the magnetic trends depend sensitively upon the topology of the Fermi surface. As the topology changes from “wedding cake” to “donut”, the mediated exchange goes from the oscillatory Ruderman-Kittel-Kasuya-Yosida to the non-collinear spiral interactions accordingly. It is rather surprising that the Fermi surface topology determines which type of magnetic interaction becomes dominant. Finally, we also discuss potential applications for carrier-mediated exchange coupling across the junction.

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.

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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