Resonant photoelectron spectroscopy at the Mo 4 p r arrow 4 d absorption edge in MoS sub 2

Journal Article · Thu Feb 14 23:00:00 EST 1991 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.43.4641· OSTI ID:5548233

Lince, J R; Didziulis, S V ^[1]; Yarmoff, J A ^[2]

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1. Chemistry and Physics Laboratory, The Aerospace Corporation, 2350 E. El Segundo Blvd., El Segundo, California 90245 (US)
2. Department of Physics, University of California at Riverside, Riverside, California 92521 (USA)

A systematic study has been conducted of the resonant behavior of the valence-band photoelectron spectrum of MoS{sub 2} for {ital h}{nu}=26--70 eV, spanning the Mo 4{ital p}{r arrow}4{ital d} transition region. A broad Fano-like resonance appears at {similar to}42 eV in the constant-initial-state (CIS) intensity plot of the {ital d}{sub {ital z}}{sup 2} peak near the valence-band maximum ({similar to}2 eV binding energy (BE)), confirming its predominantly Mo 4{ital d} character. A second shoulder on the higher-{ital h}{nu} side of the maximum in the {ital d}{sub {ital z}}{sup 2} CIS intensity plot is suggested to result from transitions to unoccupied states in the 5{ital sp} band {similar to}10 eV above {ital E}{sub {ital F}}, by comparison with a partial-yield spectrum and previous inverse-photoemission data. The region of the valence band in the range 3--4.5-eV BE also exhibits resonant behavior, indicating Mo 4{ital d} character, although somewhat less than for the {ital d}{sub {ital z}}{sup 2} peak. The 5--7-eV BE range does not exhibit resonance behavior at the Mo 4{ital p} edge and, therefore, contains negligible Mo 4{ital d} character. A feature at {similar to}30 eV in the CIS intensity plot for the 5--7-eV BE range could not be definitively assigned in this study, but may be due to a resonance between direct photoemission and a process involving absorption and autoionization of electronic states that contain Mo 5{ital s} and 5{ital p} character.

• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5548233
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 43:6; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
BREMSSTRAHLUNG
CHALCOGENIDES
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
ELEMENTS
METALS
MOLYBDENUM
MOLYBDENUM COMPOUNDS
MOLYBDENUM SULFIDES
PHOTOELECTRON SPECTROSCOPY
RADIATIONS
REFRACTORY METAL COMPOUNDS
RESONANCE
SPECTROSCOPY
SULFIDES
SULFUR COMPOUNDS
SYNCHROTRON RADIATION
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VALENCE