scholarly journals Properties of the nearly free electron superconductor Ag5Pb2O6 inferred from Fermi surface measurements

2007 ◽  
Vol 460-462 ◽  
pp. 538-539 ◽  
Author(s):  
P.D.A. Mann ◽  
M. Sutherland ◽  
C. Bergemann ◽  
S. Yonezawa ◽  
Y. Maeno
Keyword(s):  
Fermi Surface ◽  
Free Electron ◽  
Surface Measurements

Fermi surface measurements in 2H-TaSe2

1977 ◽  
Vol 21 (4) ◽  
pp. 353-356 ◽  
Author(s):  
John E. Graebner
Keyword(s):  
Fermi Surface ◽  
Surface Measurements

scholarly journals Fermi-surface measurements on the low-carrier density ferromagnetCa1−xLaxB6andSrB6

2001 ◽  
Vol 64 (23) ◽  
Author(s):  
Donavan Hall ◽  
D. P. Young ◽  
Z. Fisk ◽  
T. P. Murphy ◽  
E. C. Palm ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Carrier Density ◽  
Surface Measurements

Fermi-Surface Measurements in Normal and Superconducting2H-NbSe2

1976 ◽  
Vol 36 (8) ◽  
pp. 422-425 ◽  
Author(s):  
John E. Graebner ◽  
M. Robbins
Keyword(s):  
Fermi Surface ◽  
Surface Measurements

Fermi surface measurements in YBa2Cu3O7−x and La1.874Sr.126CuO4

1991 ◽  
Vol 185-189 ◽  
pp. 735-736 ◽  
Author(s):  
R.H. Howell ◽  
P.A. Sterne ◽  
F. Solal ◽  
M.J. Fluss ◽  
H. Haghight ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Surface Measurements

scholarly journals Fermi surface measurements in actinide metals and compounds

1979 ◽  
Vol 40 (C4) ◽  
pp. C4-9-C4-14
Author(s):  
A. J. Arko ◽  
J. E. Schirber
Keyword(s):  
Fermi Surface ◽  
Surface Measurements

scholarly journals Emergent gauge fields and the high-temperature superconductors

2016 ◽  
Vol 374 (2075) ◽  
pp. 20150248 ◽  
Author(s):  
Subir Sachdev
Keyword(s):  
Fermi Surface ◽  
Free Electron ◽  
Fermi Liquid ◽  
Degrees Of Freedom ◽  
Electron State ◽  
Cuprate Superconductors ◽  
High Temperature Superconductors ◽  
Gauge Fields ◽  
Total Density ◽  
Density Of Electrons

The quantum entanglement of many states of matter can be represented by electric and magnetic fields, much like those found in Maxwell’s theory. These fields ‘emerge’ from the quantum structure of the many-electron state, rather than being fundamental degrees of freedom of the vacuum. I review basic aspects of the theory of emergent gauge fields in insulators in an intuitive manner. In metals, Fermi liquid (FL) theory relies on adiabatic continuity from the free electron state, and its central consequence is the existence of long-lived electron-like quasi-particles around a Fermi surface enclosing a volume determined by the total density of electrons, via the Luttinger theorem. However, long-range entanglement and emergent gauge fields can also be present in metals. I focus on the ‘fractionalized Fermi liquid’ (FL*) state, which also has long-lived electron-like quasi-particles around a Fermi surface; however, the Luttinger theorem on the Fermi volume is violated, and this requires the presence of emergent gauge fields, and the associated loss of adiabatic continuity with the free electron state. Finally, I present a brief survey of some recent experiments in the hole-doped cuprate superconductors, and interpret the properties of the pseudogap regime in the framework of the FL* theory. This article is part of the themed issue ‘Unifying physics and technology in light of Maxwell's equations’.

Fermi surface measurements in layer chalcogenide crystals

Physica B+C ◽  
1981 ◽  
Vol 105 (1-3) ◽  
pp. 123-126 ◽  
Author(s):  
S.J. Hillenius ◽  
L.E. Delong ◽  
R.V. Coleman
Keyword(s):  
Fermi Surface ◽  
Surface Measurements

Fermi-Surface Measurements of Mixed-Valence CeSn3

1981 ◽  
Vol 46 (7) ◽  
pp. 504-507 ◽  
Author(s):  
W. R. Johanson ◽  
G. W. Crabtree ◽  
A. S. Edelstein ◽  
O. D. McMasters
Keyword(s):  
Fermi Surface ◽  
Mixed Valence ◽  
Surface Measurements

Electronic Structure Under Extreme Uniaxial Strains: Conductance in Metallic Nanocontacts.

1997 ◽  
Vol 499 ◽  
Author(s):  
Daniel Sánchez-Portal ◽  
Carlos Untiedt ◽  
José M. Soler ◽  
Juan J. Sáenz ◽  
Nicolas Agraït
Keyword(s):  
Electronic Structure ◽  
Fermi Surface ◽  
First Principles ◽  
Free Electron ◽  
Electron Gas ◽  
Uniaxial Stress ◽  
First Principles Calculations

ABSTRACTIn this work we address the behaviour of electronic structure under uniaxial stress, by first-principles calculations and experiments of conductance in nanometer-sized metallic contactes of Au and Al. These contacts are shown to be specially suitable for this purpose. The conductance behaviour is related to the change with strain of Fermi surface. Both experimental and theoretically Au behaves like the free electron gas but Al has the opposite behaviour.

Quantum-Well Contributions to the RKKY Coupling in Magnetic Multilayers

1993 ◽  
Vol 313 ◽  
Author(s):  
B. A. Jones ◽  
C. B. Hanna
Keyword(s):  
Quantum Well ◽  
Fermi Surface ◽  
Free Electron ◽  
Bound States ◽  
Finite Size ◽  
Oscillation Period ◽  
Magnetic Multilayers ◽  
Potential Well ◽  
Experimental Systems ◽  
Quantum Well States

ABSTRACTWe study the effects of quantum-well states on the calculated RKKY coupling. We find that the bound states of a finite-size potential well of depth V give an added oscillation period of size For the simplest case of a spherical free-electron Fermi surface, thus two periods appear: the original, “fast,” π/kf oscillation, and the quantum-well one The quantum-well contributions have larger amplitude, and are in fact the predominant oscillation. For physically reasonable V (tenths of an eV) this period is around 8–10Å. We discuss evidence for these effects in experimental systems.

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