New Display-type Analyzer for Three-dimensional Fermi Surface Mapping and Atomic Orbital Analysis

2007 ◽  
Author(s):  
Nobuaki Takahashi ◽  
Fumihiko Matsui ◽  
Hiroyuki Matsuda ◽  
Shin Shigenai ◽  
Yoshiteru Hirama ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Atomic Orbital ◽  
Three Dimensional ◽  
Display Type ◽  
Surface Mapping ◽  
Orbital Analysis

Fermi Surface Mapping Using A Third Generation Light Source

1996 ◽  
Vol 437 ◽  
Author(s):  
Eli Rotenberg ◽  
J. D. Denlinger ◽  
S. D. Kevan ◽  
K. W. Goodman ◽  
J. G. Tobin ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Fermi Level ◽  
Light Source ◽  
Three Dimensional ◽  
Electronic States ◽  
Surface States ◽  
Surface Mapping ◽  
Uniform Sampling ◽  
Surface Brillouin Zone ◽  
Takeoff Angle

AbstractThe electronic states at the Fermi surface determine diverse properties such as magnetism, chemical bonding, and phonon-electron coupling. Using a conventional hemispherical analyzer at the ultraESCA beamline 7.0 of the Advanced Light Source, we have measured Fermi contours of the bulk and surface states of Cu(001) and Ag(001). For bulk states, we used uniform sampling in k-space by varying both the electron takeoff angle as well as the photon energy. Three-dimensional plots (in k-space) of bulk and surface states at the Fermi level can easily be achieved within one or two synchrotron shifts. Surface states, whose momentum is independent of k-perpendicular, are easily mapped if sufficiently dense angular sampling is performed. The states crossing the Fermi level at X in the surface Brillouin Zone of Cu(100) and Ag(100) are presented as examples.

Atomic-orbital analysis of the Cu Fermi surface by two-dimensional photoelectron spectroscopy

2005 ◽  
Vol 72 (19) ◽  
Author(s):  
Fumihiko Matsui ◽  
Hiroaki Miyata ◽  
Oliver Rader ◽  
Yohji Hamada ◽  
Youjiro Nakamura ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Photoelectron Spectroscopy ◽  
Atomic Orbital ◽  
Two Dimensional ◽  
Orbital Analysis

The structure of the π -band of graphite

1955 ◽  
Vol 227 (1170) ◽  
pp. 349-358 ◽  
Keyword(s):  
Fermi Surface ◽  
Atomic Orbital ◽  
Reciprocal Lattice ◽  
Tight Binding ◽  
Three Dimensional ◽  
Subsequent Paper ◽  
Free Electrons ◽  
Binding Model ◽  
The Third ◽  
Explicit Formulae

A three-dimensional tight-binding model of graphite, based on the 2 p z atomic orbital of carbon, is used to calculate the energy of the π conduction states near the Fermi surface. The results of a group-theoretical analysis of the problem are used to simplify the calculation. The energy is obtained as a four-valued function of the k-vector within a primitive unit cell in the reciprocal lattice. It is found that the first and second of these bands of states are almost fully occupied, while the third and fourth are almost empty. The lowest energy of the third band is about 4 x 10 -3 eV below the highest energy of the second band, so there are ‘free’ electrons even at absolute zero. Explicit formulae are given for the energy of the states within the region occupied by the Fermi surface at temperatures below 100° K . For temperatures above 100° K , or if electron traps are present, the energy distribution within the region occupied by the Fermi surface is tabulated in detail. This knowledge of the conduction states of graphite is used in a subsequent paper to calculate the Hall coefficient of a single crystal of graphite and is found to give good agreement with experiment.

scholarly journals Fermi surface tomography

2021 ◽  
Author(s):  
Sergey Borisenko ◽  
Alexander Fedorov ◽  
Kuibarov Andrii ◽  
Marco Bianchi ◽  
Volodymyr Bezguba ◽  
...  
Keyword(s):  
High Resolution ◽  
Fermi Surface ◽  
Monochromatic Light ◽  
Three Dimensional ◽  
Detailed Comparison ◽  
Time Interval ◽  
Short Time Interval ◽  
Light Sources ◽  
Surface Mapping ◽  
Fermi Surfaces

Abstract Fermi surfaces, three-dimensional (3D) abstract interfaces that define the occupied energies of electrons in a solid, are important for characterizing and predicting the thermal, electrical, magnetic, and optical properties of crystalline metals and semiconductors [1]. Angle-resolved photoemission spectroscopy (ARPES) is the only technique directly probing the Fermi surface by measuring the Fermi momenta ( kF ) from energy- and angular distribution of photoelectrons dislodged by monochromatic light [2]. Existing electron analyzers are able to determine a number of kF -vectors simultaneously, but current technical limitations prohibit a direct high-resolution 3D Fermi surface mapping. As a result, no such datasets exist, strongly limiting our knowledge about the Fermi surfaces and restricting a detailed comparison with the widely available nowadays calculated 3D Fermi surfaces. Here we show that using a simpler instrumentation, based on the Fourier electron optics combined with a retardation field of the detector, it is possible to perform 3D-mapping within a very short time interval and with very high resolution. We present the first detailed experimental 3D Fermi surface recorded in the full Brillouin zone along the kz-direction as well as other experimental results featuring multiple advantages of our technique. In combination with various light sources, including synchrotron radiation, our methodology and instrumentation offer new opportunities for high-resolution ARPES in the physical and life sciences.

Mapping the fermi surface of graphite with a display-type photoelectron spectrometer

1991 ◽  
Vol 52 (5) ◽  
pp. 299-301 ◽  
Author(s):  
A. Santoni ◽  
L. J. Terminello ◽  
F. J. Himpsel ◽  
T Takahashi
Keyword(s):  
Fermi Surface ◽  
Display Type

Wear and Corrosion Behaviours of FeCrNiSi Alloy Coatings by Laser Cladding

2017 ◽  
Vol 898 ◽  
pp. 1406-1413
Author(s):  
Yu Long Qi ◽  
Hai Yan Chen ◽  
Chen Yang Shu ◽  
Xuan Zhao ◽  
Li Hua Dong ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Abrasive Wear ◽  
Laser Cladding ◽  
Wear Behavior ◽  
Testing Machine ◽  
Three Dimensional ◽  
Xrd Analysis ◽  
Hard Coating ◽  
Wear Testing ◽  
Surface Mapping

Soft and hard FeCrNiSi alloy coatings were obtained on 30CrMo alloy steel surface by laser cladding. The phase constitution, microstructure, frictional wear behavior and corrosion resistance of the composite coating were analyzed using X-ray diffraction (XRD), scanning electron microscope (SEM), three-dimensional non-contact surface mapping, friction and wear testing machine and electrochemical workstation, separately. XRD analysis showed that the cladding layer was mainly composed of Fe-based alloy composition, accompanied by a small amount of cobalt nickel alloy. There were massive protrusions in the interface of the soft sample, and the coating was regularly dendritic. Hard sample coating lines were cluttered, and there was no bulk deposition. Under the same wear condition, the soft coating exhibited serious abrasive wear, while the hard coating had slight abrasive wear behavior. The polarization curves in 3%NaCl solution revealed that the self-corrosion potential of the soft coating was positive shifted more than that the hard coating. The soft coating has better corrosion resistance than the hard coating.

scholarly journals Angular-dependent oscillations of the magnetoresistance inBi2Se3due to the three-dimensional bulk Fermi surface

2010 ◽  
Vol 81 (19) ◽  
Author(s):  
Kazuma Eto ◽  
Zhi Ren ◽  
A. A. Taskin ◽  
Kouji Segawa ◽  
Yoichi Ando
Keyword(s):  
Fermi Surface ◽  
Three Dimensional
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