Surface state at theK¯point of the surface Brillouin zone on Cu{111}

We have investigated the electronic structure of the single-domain 3C–SiC(001)(2×1) using angle-resolved photoemission and synchrotron radiation. Two different surface-state bands are clearly identified within the bulk bandgap. The upper band has a binding energy of 1.4 eV at the center of the surface Brillouin zone (SBZ) and shows a weak dispersion of 0.3 eV in the [Formula: see text] direction, but is nondispersive in the perpendicular direction. It has a polarization dependence suggesting a pz character, as expected for a Si dangling-bond state. The second band is located at 2.4 eV binding energy and is nondispersive. The weak or nonexistent dispersions suggest very localized electronic states at the surface and show poor agreement with calculated dispersions for the proposed models for the 2×1 and c(4×2) reconstructions.

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Surface State at Kmacr- Point of Surface Brillouin Zone on Cu{111} Surface

Chinese Physics Letters ◽

10.1088/0256-307x/13/6/018 ◽

1996 ◽

Vol 13 (6) ◽

pp. 465-468

Author(s):

Yi Yang ◽

Feng-qin Liu ◽

Jin-feng Jia ◽

Yu-hui Dong ◽

Kurash Ibrahim ◽

...

Keyword(s):

Brillouin Zone ◽

Surface State ◽

Surface Brillouin Zone

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The $(\sqrt{3}\times\sqrt{3}){\rm R}30^{\circ}$-Reconstructed 6H–SiC(0001): A Semiconducting Surface

Surface Review and Letters ◽

10.1142/s0218625x98000360 ◽

1998 ◽

Vol 05 (01) ◽

pp. 193-197 ◽

Cited By ~ 17

Author(s):

I. Forbeaux ◽

J.-M. Themlin ◽

V. Langlais ◽

L. M. Yu ◽

H. Belkhir ◽

...

Keyword(s):

Charge Transfer ◽

Fermi Level ◽

Brillouin Zone ◽

Surface State ◽

Photoemission Spectroscopy ◽

Metallic Behavior ◽

Inverse Photoemission ◽

Surface Brillouin Zone ◽

Inverse Photoemission Spectroscopy ◽

Good Agreement

k//-resolved inverse-photoemission spectroscopy of the [Formula: see text] reconstruction of 6H–SiC(0001) reveals a sharp surface state U located 1.10±0.05 eV above the Fermi level at the center of the surface Brillouin zone with a total bandwidth of 0.34±0.05 eV. This value is in good agreement with recent LDA calculations which predict an adatom-induced surface state Σ1 which should be half-filled. In this model, the adatoms are Si atoms occupying the T 4 site above a compact SiC(0001) (Si) termination. In contrast to the predicted metallic behavior, the U state remains completely unoccupied throughout the whole Brillouin zone, and the surface is semiconducting. We propose that some charge transfer from the Si adatoms towards subsituted C atoms in the terminating bilayer stabilizes the reconstruction by moving up the Σ1 state away from the Fermi level.

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A NEGATIVE SPIN-POLARIZATION STRUCTURE OF Ni(110): PROBED BY SPIN- AND ANGLE-RESOLVED PHOTOELECTRON SPECTROSCOPY

Surface Review and Letters ◽

10.1142/s0218625x02003640 ◽

2002 ◽

Vol 09 (02) ◽

pp. 1287-1290

Author(s):

S. QIAO ◽

A. KIMURA ◽

H. NARITA ◽

K. YAJI ◽

E. KOTANI ◽

...

Keyword(s):

Binding Energy ◽

Spin Polarization ◽

Brillouin Zone ◽

Surface State ◽

Photoelectron Spectroscopy ◽

Text Line ◽

Negative Polarization ◽

Polarization Structure ◽

Surface Brillouin Zone

We already reported the spin- and angle-resolved photoelectron measurements of Ni(110), Ni (110)- p (2 × 1) O and Ni (110)- c (2 × 2) S along the [Formula: see text] line of the Ni(110) surface Brillouin zone using He I radiation. We found that the structure at about 1.3 eV binding energy showed unusual character near the [Formula: see text] point. The spin polarization of this structure was observed to be negative. After the adsorption of oxygen and sulfur on the Ni(110) surface, the degree of negative spin polarization was found to decrease. To study the property of this state, that it is a bulk or surface-related, and to clarify the origin of the negative polarization, we performed spin- and angle-resolved photoemission measurements for Ni(110) along the LW line of its bulk Brillouin zone. The results show that this negative polarization structure can be attributed to a surface state near the [Formula: see text] point.

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Flatness and boundness of photonic drumhead surface state in a metallic lattice

Scientific Reports ◽

10.1038/s41598-021-88004-1 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Yu Wang ◽

Xiaoxi Zhou ◽

Shanshan Li ◽

Wenya Zhang ◽

Chuandeng Hu ◽

...

Keyword(s):

Band Structure ◽

Brillouin Zone ◽

Surface State ◽

Bound State ◽

Experimental Investigations ◽

Far Field ◽

Reflection Measurement ◽

Potential Applications ◽

Surface Brillouin Zone ◽

Symmetry Protected

AbstractNodal chain (NC) semi-metals have the degeneracy of interlacing rings in their band structure in momentum space. With the projection of degenerate rings towards crystal boundaries, there is a special type of surface dispersion appearing at surface Brillouin zone and termed drumhead surface state (DSS). Previously, experimental investigations on photonic NC and DSS have been done on metallic photonic crystals at microwave frequencies. However, far-field detection of DSS and its coupling to radiative modes in free space have not been studied. In the work, we analyze the photonic DSS in a metallic lattice by angle-resolved far-field reflection measurement and numerical simulation at terahertz (THz) frequencies, and reveal its flatness and boundness in band structure, even in the radiation continuum. Particularly, the DSS band can be tuned being from negatively dispersive via flat to positively dispersive by a single surface parameter, and the DSS at Γ point in surface Brillouin zone is in fact a symmetry-protected bound state in the continuum. Our results might have some potential applications towards THz photonics.

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Fermi Surface-Brillouin Zone Interactions in 2/1-2/1-2/1 Bergman-Type Approximant Na27Au27Ga31

Acta Physica Polonica A ◽

10.12693/aphyspola.126.535 ◽

2014 ◽

Vol 126 (2) ◽

pp. 535-538 ◽

Cited By ~ 2

Author(s):

U. Mizutani ◽

H. Sato ◽

M. Inukai ◽

E.S. Zijlstra ◽

Q. Lin ◽

...

Keyword(s):

Fermi Surface ◽

Brillouin Zone ◽

Surface Brillouin Zone

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Relation Between Surface Crystallography and Surface Electron Structure of the Superlattice

Surface Review and Letters ◽

10.1142/s0218625x03004731 ◽

2003 ◽

Vol 10 (02n03) ◽

pp. 195-199 ◽

Cited By ~ 1

Author(s):

I. Bartoš ◽

T. Strasser ◽

W. Schattke

Keyword(s):

Energy Distribution ◽

Surface State ◽

Electron Structure ◽

Surface Electron ◽

One Dimensional ◽

One Step ◽

Surface Brillouin Zone ◽

Topmost Layer ◽

The One ◽

Periodic Crystal

Profound gradual changes of surface state energies were predicted for varying surface terminations of the periodic crystal potential in one-dimensional models.1 This situation can be realized in superlattices with different thicknesses of topmost layers. For the ideally terminated (100) surface of a very thin superlattice (GaAs)2(AlAs)2, the shift of the energy of the surface state over the whole minigap in the lower part of the valence band has been found for different terminations of the topmost layer. In the center of the surface Brillouin zone the surface state shift follows model trends. The changes of the energy distribution of photoemitted electrons as determined from the one-step photoemission calculation2 indicate that experimental observation by the surface-sensitive technique of angle-resolved photoemission should be feasible, and preliminary data indicate this. The results show a straigthforward tuning of surface electron structure by geometrical means.

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NEW ELECTRONIC STATES ON CLEAN Si(110)-“16×2” SURFACES

Surface Review and Letters ◽

10.1142/s0218625x95000546 ◽

1995 ◽

Vol 02 (05) ◽

pp. 573-577 ◽

Cited By ~ 5

Author(s):

A. CRICENTI ◽

B. NESTERENKO ◽

P. PERFETTI ◽

G. LE LAY ◽

C. SEBENNE

Keyword(s):

Electronic Properties ◽

Brillouin Zone ◽

Photoelectron Spectroscopy ◽

Structural Model ◽

Electronic States ◽

Surface States ◽

Ultraviolet Photoelectron Spectroscopy ◽

Surface Brillouin Zone ◽

Differential Reflectivity

The electronic properties of a clean Si (110)-“16×2” surface have been studied by angle-resolved ultraviolet photoelectron spectroscopy (ARUPS) and surface differential reflectivity (SDR). Four surface states have been recognized by ARUPS and their dispersions have been mapped along the main symmetry lines in the surface Brillouin zone. SDR experiments revealed transitions between filled and empty surface states at ~ 1.8, 2.4, and 2.9 eV. The results are explained on the basis of a new structural model of the Si (110)-“16×2” phase.

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