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Title: Orbital Character Effects in the Photon Energy and Polarization Dependence of Pure C 60 Photoemission

Abstract

We report that recent direct experimental observation of multiple highly dispersive C 60 valence bands has allowed for a detailed analysis of the unusual photoemission traits of these features through photon energy- and polarization-dependent measurements. Previously obscured dispersions and strong photoemission traits are now revealed by specific light polarizations. The observed intensity effects prove the locking in place of the C 60 molecules at low temperatures and the existence of an orientational order imposed by the substrate chosen. Most importantly, photon energy- and polarization-dependent effects are shown to be intimately linked with the orbital character of the C 60 band manifolds which allow for a more precise determination of the orbital character within the third highest occupied molecular orbital (HOMO-2). In conclusion, our observations and analysis provide important considerations for the connection between molecular and crystalline C 60 electronic structure, past and future band structure studies, and for increasingly popular C 60 electronic device applications, especially those making use of heterostructures.

Authors:
 [1]; ORCiD logo [2];  [3];  [2];  [4];  [5]
  1. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. California State Univ. (CalState), Long Beach, CA (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  4. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Kavli Energy NanoSciences Inst.
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); California State Univ. (CalState), Long Beach, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1581081
Alternate Identifier(s):
OSTI ID: 1595116
Grant/Contract Number:  
AC02-05CH11231; SC0018154
Resource Type:
Accepted Manuscript
Journal Name:
ACS Nano
Additional Journal Information:
Journal Volume: 13; Journal Issue: 11; Journal ID: ISSN 1936-0851
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; C60; angle resolved photoemission spectroscopy; polarization-dependent photoemission; molecular solid; orbital character; 77 NANOSCIENCE AND NANOTECHNOLOGY; C60, angle resolved photoemission spectroscopy, polarization-dependent photoemission, molecular solid, orbital character

Citation Formats

Latzke, Drew W., Ojeda-Aristizabal, Claudia, Denlinger, Jonathan D., Reno, Ryan, Zettl, Alex, and Lanzara, Alessandra. Orbital Character Effects in the Photon Energy and Polarization Dependence of Pure C60 Photoemission. United States: N. p., 2019. Web. doi:10.1021/acsnano.9b04536.
Latzke, Drew W., Ojeda-Aristizabal, Claudia, Denlinger, Jonathan D., Reno, Ryan, Zettl, Alex, & Lanzara, Alessandra. Orbital Character Effects in the Photon Energy and Polarization Dependence of Pure C60 Photoemission. United States. doi:10.1021/acsnano.9b04536.
Latzke, Drew W., Ojeda-Aristizabal, Claudia, Denlinger, Jonathan D., Reno, Ryan, Zettl, Alex, and Lanzara, Alessandra. Tue . "Orbital Character Effects in the Photon Energy and Polarization Dependence of Pure C60 Photoemission". United States. doi:10.1021/acsnano.9b04536.
@article{osti_1581081,
title = {Orbital Character Effects in the Photon Energy and Polarization Dependence of Pure C60 Photoemission},
author = {Latzke, Drew W. and Ojeda-Aristizabal, Claudia and Denlinger, Jonathan D. and Reno, Ryan and Zettl, Alex and Lanzara, Alessandra},
abstractNote = {We report that recent direct experimental observation of multiple highly dispersive C60 valence bands has allowed for a detailed analysis of the unusual photoemission traits of these features through photon energy- and polarization-dependent measurements. Previously obscured dispersions and strong photoemission traits are now revealed by specific light polarizations. The observed intensity effects prove the locking in place of the C60 molecules at low temperatures and the existence of an orientational order imposed by the substrate chosen. Most importantly, photon energy- and polarization-dependent effects are shown to be intimately linked with the orbital character of the C60 band manifolds which allow for a more precise determination of the orbital character within the third highest occupied molecular orbital (HOMO-2). In conclusion, our observations and analysis provide important considerations for the connection between molecular and crystalline C60 electronic structure, past and future band structure studies, and for increasingly popular C60 electronic device applications, especially those making use of heterostructures.},
doi = {10.1021/acsnano.9b04536},
journal = {ACS Nano},
number = 11,
volume = 13,
place = {United States},
year = {2019},
month = {10}
}

Journal Article:
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This content will become publicly available on October 22, 2020
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