Accessing Surface Brillouin Zone and Band Structure of Picene Single Crystals

AbstractAngle-resolved photoemission was used to study the surface electronic band structure of ferromagnetic CoS2(below 120K) in high-quality single crystal samples. Strongly dispersing Co t2g bands are identified along the <100> k// direction. Fermi level crossings are identified along this Γ - X line (of the surface Brillouin zone) in higher resolution photoemission spectra, suggesting that the overall polarization may be controlled by the details of the band structure, particularly the surface band structure, rather than by exchange splitting on the Co atoms.

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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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Electronic band structure of gallium nitride: a comparative angle-resolved photoemission study of single crystals and thin films

Surface Science ◽

10.1016/s0039-6028(02)01216-5 ◽

2002 ◽

Vol 507-510 ◽

pp. 223-228 ◽

Cited By ~ 13

Author(s):

L. Plucinski ◽

T. Strasser ◽

B.J. Kowalski ◽

K. Rossnagel ◽

T. Boetcher ◽

...

Keyword(s):

Thin Films ◽

Gallium Nitride ◽

Band Structure ◽

Single Crystals ◽

Electronic Band Structure ◽

Electronic Band ◽

Photoemission Study

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Electrical properties and valence band structure of GeSexTe1?x single crystals

Zeitschrift für anorganische und allgemeine Chemie ◽

10.1002/zaac.19936190128 ◽

1993 ◽

Vol 619 (1) ◽

pp. 168-173 ◽

Cited By ~ 1

Author(s):

Y. R. Ge ◽

H. Wiedemeier

Keyword(s):

Electrical Properties ◽

Band Structure ◽

Single Crystals ◽

Valence Band ◽

Valence Band Structure

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Photonic Band Structure of Nanochannel Glass Materials

MRS Proceedings ◽

10.1557/proc-431-449 ◽

1996 ◽

Vol 431 ◽

Author(s):

A. Rosenberg ◽

R. J. Tonucci ◽

H.-B. Lin

Keyword(s):

Band Structure ◽

Brillouin Zone ◽

Near Infrared ◽

Nearest Neighbor ◽

Dielectric Structure ◽

Zone Boundary ◽

Photonic Band Structure ◽

Brillouin Zone Boundary ◽

Photonic Band ◽

Good Agreement

AbstractWe demonstrate that nanochannel glass (NCG) materials are ideal for investigating twodimensional (2D) photonic band-structure effects. The NCG materials we have studied consist of triangular arrays of glass cylinders embedded in a glass matrix, having center-tocenter nearest-neighbor separations from 0.54 to 1.08 μm. The indices of refraction of the two glasses differ by less than 0.02 in the relevant spectral region. Narrow attenuation features occur whenever the dispersion relation for light propagating within such a periodic dielectric structure crosses a Brillouin zone boundary. The attenuations corresponding to the first Brillouin zone appear in the near-infrared (IR), at wavelengths between 1 and 3 μm, in good agreement with calculations.

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Evolution to an anisotropic band structure caused by Sn doping in Bi1.995Sn0.005Te3 single crystals

Journal of Physics Condensed Matter ◽

10.1088/1361-648x/abbf2c ◽

2020 ◽

Vol 33 (3) ◽

pp. 035705

Author(s):

Yusuff Adeyemi Salawu ◽

Minoru Sasaki ◽

Vladimir Anatol’evich Kulbachinskii ◽

Akimasa Ohnishi ◽

Heon-Jung Kim

Keyword(s):

Band Structure ◽

Single Crystals ◽

Sn Doping

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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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Band structure and optical constants of SnS2 single crystals

Materials Research Express ◽

10.1088/2053-1591/aafb25 ◽

2019 ◽

Vol 6 (4) ◽

pp. 046203 ◽

Cited By ~ 3

Author(s):

E V Rusu ◽

N N Syrbu ◽

A V Tiron ◽

V V Zalamai

Keyword(s):

Band Structure ◽

Single Crystals ◽

Optical Constants

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Phonon Dispersion in ZnSe

Canadian Journal of Physics ◽

10.1139/p72-346 ◽

1972 ◽

Vol 50 (21) ◽

pp. 2596-2604 ◽

Cited By ~ 57

Author(s):

J. C. Irwin ◽

J. LaCombe

Keyword(s):

Experimental Data ◽

Theoretical Model ◽

Specific Heat ◽

Single Crystals ◽

Raman Spectra ◽

Density Of States ◽

Brillouin Zone ◽

Critical Points ◽

Phonon Dispersion ◽

Zone Boundary

Second-order Raman spectra have been obtained from oriented single crystals of ZnSe. The spectra have been interpreted and the results have been used to determine the zone boundary frequencies at the critical points X, L, and W. The resulting set of frequencies are consistent with known polarization selection rules and with a theoretical model. The frequencies in turn serve to determine the parameters in the theoretical model and the resulting model has been used to calculate the phonon dispersion throughout the Brillouin zone, the density of states, and the specific heat. The results are compared to the small amount of experimental data that is available.

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