Ultraviolet laser photoemission spectroscopy of FeSi: Observation of a gap opening in density of states

2005 ◽  
Vol 72 (23) ◽  
Author(s):  
K. Ishizaka ◽  
T. Kiss ◽  
T. Shimojima ◽  
T. Yokoya ◽  
T. Togashi ◽  
...  
Keyword(s):  
Density Of States ◽  
Photoemission Spectroscopy ◽  
Ultraviolet Laser ◽  
Laser Photoemission ◽  
Gap Opening

scholarly journals Investigation of single-domain Au silicide nanowires on Si(110) formed for Au coverages in the monolayer regime

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Stephan Appelfeller
Keyword(s):  
Fermi Level ◽  
Surface Structure ◽  
Density Of States ◽  
The Self ◽  
Single Domain ◽  
Photoemission Spectroscopy ◽  
Annealing Temperatures ◽  
Self Organized ◽  
Scanning Tunnelling ◽  
Tunnelling Microscopy

AbstractThe self-organized formation of single domain Au silicide nanowires is observed on Si(110). These nanowires are analysed using scanning tunnelling microscopy (STM) and spectroscopy (STS) as well as photoemission spectroscopy (PES). Core-level PES is utilised to confirm the formation of Au silicide and establish its presence as the top most surface structure, i.e., the nanowires. The growth of the Au silicide nanowires and their dimensions are studied by STM. They form for Au coverages of about 1 monolayer and are characterized by widths of about 2 to 3 nm and heights below 1 nm while reaching lengths exceeding 500 nm when choosing appropriate annealing temperatures. Valence band PES and STS indicate a small but finite density of states at the Fermi level typical for compound metals.

scholarly journals Tunable vacuum ultraviolet laser based spectrometer for angle resolved photoemission spectroscopy

2014 ◽  
Vol 85 (3) ◽  
pp. 033902 ◽  
Author(s):  
Rui Jiang ◽  
Daixiang Mou ◽  
Yun Wu ◽  
Lunan Huang ◽  
Colin D. McMillen ◽  
...  
Keyword(s):  
Vacuum Ultraviolet ◽  
Photoemission Spectroscopy ◽  
Ultraviolet Laser ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Vacuum Ultraviolet Laser

A Polarization-Adjustable Picosecond Deep-Ultraviolet Laser for Spin- and Angle-Resolved Photoemission Spectroscopy

2012 ◽  
Vol 29 (6) ◽  
pp. 064206 ◽  
Author(s):  
Feng-Feng Zhang ◽  
Feng Yang ◽  
Shen-Jin Zhang ◽  
Zhi-Min Wang ◽  
Feng-Liang Xu ◽  
...  
Keyword(s):  
Photoemission Spectroscopy ◽  
Ultraviolet Laser ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Deep Ultraviolet

ARPES study of LSCO and PBCO: Electronic structure of the stripe phase and the 1/4-filled Cu-O chains

2000 ◽  
Vol 14 (29n31) ◽  
pp. 3602-3609
Author(s):  
T. Mizokawa ◽  
A. Ino ◽  
T. Yoshida ◽  
A. Fujimori ◽  
C. Kim ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Spectral Feature ◽  
Spectral Weight ◽  
Charge Ordering ◽  
Photoemission Spectroscopy ◽  
Stripe Phase ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Weight Suppression ◽  
Gap Opening ◽  
The Difference

We have studied the electronic structure of the stripe phase in La 2-x Sr x CuO 4 (LSCO) and the Cu-O chains in PrBa 2 Cu 3 O 7 (Pr123) and PrBa 2 Cu 4 O 8 (Pr124) using angle-resolved photoemission spectroscopy (ARPES). In LSCO with x=0.12, the spectral feature near the Fermi level (EF) is almost flat from (π, 0) to (π, π/4), namely, along the stripe direction in LSCO. While the 1/4-filled chain in Pr123 has a band gap because of charge ordering, the metallic chain in Pr124 shows a dispersive feature which reaches EF at ~(π, π/4) and a flat feature near EF which is similar to that observed in the stripe phase of LSCO. Although Pr124 shows spectral-weight suppression near EF due to the instability toward charge ordering, the suppression is imperfect and Pr124 has a substantial spectral weight at EF probably due to the chain-chain coupling. This is in sharp contrast to LSCO with the perfect gap opening near (π, π/4). The difference between the stripe phase in LSCO and the coupled chains of Pr124 would be derived from the interaction between the stripe and the neighboring Cu spins which suppresses the charge ordering along the stripe.

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