scholarly journals Two-dimensional Fermi surfaces in Kondo insulator SmB6

Science ◽  
2014 ◽  
Vol 346 (6214) ◽  
pp. 1208-1212 ◽  
Author(s):  
G. Li ◽  
Z. Xiang ◽  
F. Yu ◽  
T. Asaba ◽  
B. Lawson ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Cross Sections ◽  
Surface Topology ◽  
Surface Conductance ◽  
Two Dimensional ◽  
Kondo Insulator ◽  
Fermi Surfaces ◽  
Samarium Hexaboride ◽  
Surface Plane ◽  
The Magnetic Field

In the Kondo insulator samarium hexaboride (SmB6), strong correlation and band hybridization lead to an insulating gap and a diverging resistance at low temperature. The resistance divergence ends at about 3 kelvin, a behavior that may arise from surface conductance. We used torque magnetometry to resolve the Fermi surface topology in this material. The observed oscillation patterns reveal two Fermi surfaces on the (100) surface plane and one Fermi surface on the (101) surface plane. The measured Fermi surface cross sections scale as the inverse cosine function of the magnetic field tilt angles, which demonstrates the two-dimensional nature of the conducting electronic states of SmB6.

ELECTRON MAGNETIC RESONANCE FERMI SURFACE IMAGING: APPLICATIONS TO ORGANIC CONDUCTORS AND Sr2RuO4

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3109-3112
Author(s):  
S. HILL ◽  
A. KOVALEV ◽  
M. M. MOLA ◽  
C. PALASSIS ◽  
Z. Q. MAO ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Cyclotron Resonance ◽  
Charge Density Wave ◽  
Density Wave ◽  
Organic Conductors ◽  
Metallic State ◽  
Surface Imaging ◽  
Two Dimensional ◽  
Fermi Surfaces ◽  
Fermi Surface Nesting

We report detailed angle dependent studies of the metallic state microwave (40 to 200 GHz) magneto-conductivity of single crystal samples of the α- (BEDT-TTF) 2 KHg(SCN) 4 organic charge density wave conductor, and the perovskite superconductor Sr 2 RuO 4. We observe series' of resonant absorptions which we attribute to periodic orbit resonances - a phenomenon closely related to cyclotron resonance. By performing measurements on several samples, and in different electromagnetic field configurations, we are able to couple to different orbital modes (+ harmonics), which derive from deformations (warpings) of the quasi-one and quasi-two-dimensional Fermi surfaces of these compounds. These studies provide vital information concerning interlayer dispersion which, in turn, affects the Fermi surface nesting characteristics which are believed to play a crucial role in the low temperature physics of these exotic materials.

scholarly journals Characteristic two-dimensional Fermi surface topology of high-Tc iron-based superconductors

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Masanori Sunagawa ◽  
Toshihiko Ishiga ◽  
Koji Tsubota ◽  
Taihei Jabuchi ◽  
Junki Sonoyama ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Surface Topology ◽  
Two Dimensional ◽  
Iron Based Superconductors ◽  
High Tc ◽  
Fermi Surface Topology ◽  
Characteristic Two ◽  
Iron Based

A computer calculation of Fermi surface cross sections using the empty lattice model

1968 ◽  
Vol 46 (12) ◽  
pp. 1403-1412 ◽  
Author(s):  
Roger Taylor
Keyword(s):  
Fermi Surface ◽  
Computer Program ◽  
Cross Sections ◽  
Lattice Model ◽  
Computer Calculation ◽  
Correct Interpretation ◽  
Fermi Surfaces ◽  
The One ◽  
Computer Output

A computer program has been written in Fortran IV to calculate the areas of Fermi surface cross sections using the empty lattice model often referred to as the one-OPW model. The program employs the Harrison (1960) construction and will work for any structure with any Fermi radius. For hexagonal structures both the single and double zone schemes may be employed. Any plane may be selected by the user. This plane may be rotated a specified number of times about two axes and also shifted along one of the axes in order to search for extremal orbits along this axis. In applying the program to complicated Fermi surfaces a qualitative sketch of the surface may be necessary for the correct interpretation of the computer output. A copy of the deck of cards comprising the program may be obtained from the Depository of Unpublished Data.

FERMI SURFACE TOPOLOGY BY THE TWO DIMENSIONAL ANGULAR CORRELATION OF ANNIHILATION RADIATION : COPPER, A TEST CASE

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-1084-C6-1085 ◽  
Author(s):  
A. A. Manuel ◽  
S. Samoilov ◽  
Ø. Fischer ◽  
M. Peter ◽  
A. P. Jeavons
Keyword(s):  
Fermi Surface ◽  
Angular Correlation ◽  
Surface Topology ◽  
Test Case ◽  
Annihilation Radiation ◽  
Two Dimensional ◽  
Fermi Surface Topology

scholarly journals Pseudogap and Fermi-Surface Topology in the Two-Dimensional Hubbard Model

2018 ◽  
Vol 8 (2) ◽  
Author(s):  
Wei Wu ◽  
Mathias S. Scheurer ◽  
Shubhayu Chatterjee ◽  
Subir Sachdev ◽  
Antoine Georges ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Hubbard Model ◽  
Surface Topology ◽  
Two Dimensional ◽  
Fermi Surface Topology

Fermi Surface Topology and Electronic Structures of Two- Dimensional Organic Conductors Based on Bedt-TTF and Mdt-TTF

1992 ◽  
Vol 67 (1-4) ◽  
pp. 377-382 ◽  
Author(s):  
Toshikazu Nakamura ◽  
Gunzi Saito ◽  
Noboru Miura ◽  
Toshihito Osada ◽  
Seiichi Kagoshima ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Electronic Structures ◽  
Organic Conductors ◽  
Surface Topology ◽  
Two Dimensional ◽  
Fermi Surface Topology
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