Observation of Hidden Fermi Surface Nesting in a Two Dimensional Conductor

1996 ◽  
Vol 76 (17) ◽  
pp. 3172-3175 ◽  
Author(s):  
Klaus Breuer ◽  
Cristian Stagarescu ◽  
Kevin E. Smith ◽  
Martha Greenblatt ◽  
Kandalam Ramanujachary
Keyword(s):  
Fermi Surface ◽  
Two Dimensional ◽  
Fermi Surface Nesting

TWO-DIMENSIONAL HUME-ROTHERY PHASES

1990 ◽  
Vol 04 (13) ◽  
pp. 1983-1992
Author(s):  
R. S. MARKIEWICZ
Keyword(s):  
Phase Transitions ◽  
Fermi Surface ◽  
Three Dimensional ◽  
Organic Superconductors ◽  
Intercalation Compounds ◽  
Oxide Superconductors ◽  
Two Dimensional ◽  
Graphite Intercalation ◽  
Fermi Surface Nesting ◽  
The Individual

The traditional Hume-Rothery phases are Cu-bronzes or other (three-dimensional) alloys, which show a series of phase transitions at fixed electron-per-atom ratios, independent of the particular atomic constituents. The transitions are driven by Fermi surface nesting within the individual phases. It is shown that similar transitions appear to be a pervasive feature of two-dimensional systems. Examples are given involving graphite intercalation compounds, organic superconductors, and the new high T c oxide superconductors.

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 Deformation of the Fermi surface of a spinless two-dimensional electron gas in presence of an anisotropic Coulomb interaction potential

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Orion Ciftja
Keyword(s):  
Fermi Surface ◽  
Coulomb Interaction ◽  
Interaction Potential ◽  
Fermi Liquid ◽  
Energy State ◽  
Electron Gas ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Dimensional Electron Gas

AbstractWe consider the stability of the circular Fermi surface of a two-dimensional electron gas system against an elliptical deformation induced by an anisotropic Coulomb interaction potential. We use the jellium approximation for the neutralizing background and treat the electrons as fully spin-polarized (spinless) particles with a constant isotropic (effective) mass. The anisotropic Coulomb interaction potential considered in this work is inspired from studies of two-dimensional electron gas systems in the quantum Hall regime. We use a Hartree–Fock procedure to obtain analytical results for two special Fermi liquid quantum electronic phases. The first one corresponds to a system with circular Fermi surface while the second one corresponds to a liquid anisotropic phase with a specific elliptical deformation of the Fermi surface that gives rise to the lowest possible potential energy of the system. The results obtained suggest that, for the most general situations, neither of these two Fermi liquid phases represent the lowest energy state of the system within the framework of the family of states considered in this work. The lowest energy phase is one with an optimal elliptical deformation whose specific value is determined by a complex interplay of many factors including the density of the system.

scholarly journals A Two Dimensional Fermi Liquid. Part 3: The Fermi Surface

2004 ◽  
Vol 247 (1) ◽  
pp. 113-177 ◽  
Author(s):  
Joel Feldman ◽  
Horst Kn�rrer ◽  
Eugene Trubowitz
Keyword(s):  
Fermi Surface ◽  
Fermi Liquid ◽  
Two Dimensional ◽  
Liquid Part

Large Intrinsic Resistivity of Monolayer Cu2Si and Fermi Surface Nesting

2021 ◽  
Vol 3 (3) ◽  
pp. 1279-1287
Author(s):  
Mingfeng Zhu ◽  
Haibo Yao ◽  
Liwei Jiang ◽  
Yisong Zheng
Keyword(s):  
Fermi Surface ◽  
Fermi Surface Nesting

scholarly journals Spin-valley half-metal in systems with Fermi surface nesting

2018 ◽  
Vol 98 (15) ◽  
Author(s):  
A. L. Rakhmanov ◽  
A. O. Sboychakov ◽  
K. I. Kugel ◽  
A. V. Rozhkov ◽  
Franco Nori
Keyword(s):  
Fermi Surface ◽  
Half Metal ◽  
Fermi Surface Nesting

Experimental band structure and Fermi surface of a two-dimensional Er silicide on Si(111)

1992 ◽  
Vol 82 (4) ◽  
pp. 235-238 ◽  
Author(s):  
P. Wetzel ◽  
C. Pirri ◽  
P. Paki ◽  
J.C. Peruchetti ◽  
D. Bolmont ◽  
...  
Keyword(s):  
Band Structure ◽  
Fermi Surface ◽  
Two Dimensional
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