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Title: Nearly-free-electron system of monolayer Na on the surface of single-crystal HfSe 2

Abstract

Here, the electronic structure of a single Na monolayer on the surface of single-crystal HfSe2 is investigated using angle-resolved photoemission spectroscopy. We find that this system exhibits an almost perfect "nearly-free-electron" behavior with an extracted effective mass of ~1me, in contrast to heavier masses found previously for alkali-metal monolayers on other substrates. Our density-functional-theory calculations indicate that this is due to the large lattice constant, causing both exchange and correlation interactions to be suppressed, and to the weak hybridization between the overlayer and the substrate. This is therefore an ideal model system for understanding the properties of two-dimensional materials.

Authors:
 [1];  [2];  [1];  [1];  [3];  [4];  [3];  [4];  [5];  [1];  [1]
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  1. Suranaree Univ. of Technology, Nakhon Ratchasima (Thailand)
  2. Suranaree Univ. of Technology, Nakhon Ratchasima (Thailand); Synchrotron Light Research Institute, Nakhon Ratchasima (Thailand)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. Univ. of St. Andrews, Fife (United Kingdom)
  5. Univ. of Tokyo, Tokyo (Japan); RIKEN Advanced Science Institute, Saitama (Japan)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1398442
Alternate Identifier(s):
OSTI ID: 1333598
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 20; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Eknapakul, T., Fongkaew, I., Siriroj, S., Vidyasagar, R., Denlinger, J. D., Bawden, L., Mo, S. -K., King, P. D. C., Takagi, H., Limpijumnong, S., and Meevasana, W. Nearly-free-electron system of monolayer Na on the surface of single-crystal HfSe2. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.94.201121.
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Eknapakul, T., Fongkaew, I., Siriroj, S., Vidyasagar, R., Denlinger, J. D., Bawden, L., Mo, S. -K., King, P. D. C., Takagi, H., Limpijumnong, S., & Meevasana, W. Nearly-free-electron system of monolayer Na on the surface of single-crystal HfSe2. United States. https://doi.org/10.1103/PhysRevB.94.201121
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Eknapakul, T., Fongkaew, I., Siriroj, S., Vidyasagar, R., Denlinger, J. D., Bawden, L., Mo, S. -K., King, P. D. C., Takagi, H., Limpijumnong, S., and Meevasana, W. Tue . "Nearly-free-electron system of monolayer Na on the surface of single-crystal HfSe2". United States. https://doi.org/10.1103/PhysRevB.94.201121. https://www.osti.gov/servlets/purl/1398442.
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@article{osti_1398442,
title = {Nearly-free-electron system of monolayer Na on the surface of single-crystal HfSe2},
author = {Eknapakul, T. and Fongkaew, I. and Siriroj, S. and Vidyasagar, R. and Denlinger, J. D. and Bawden, L. and Mo, S. -K. and King, P. D. C. and Takagi, H. and Limpijumnong, S. and Meevasana, W.},
abstractNote = {Here, the electronic structure of a single Na monolayer on the surface of single-crystal HfSe2 is investigated using angle-resolved photoemission spectroscopy. We find that this system exhibits an almost perfect "nearly-free-electron" behavior with an extracted effective mass of ~1me, in contrast to heavier masses found previously for alkali-metal monolayers on other substrates. Our density-functional-theory calculations indicate that this is due to the large lattice constant, causing both exchange and correlation interactions to be suppressed, and to the weak hybridization between the overlayer and the substrate. This is therefore an ideal model system for understanding the properties of two-dimensional materials.},
doi = {10.1103/PhysRevB.94.201121},
journal = {Physical Review B},
number = 20,
volume = 94,
place = {United States},
year = {Tue Nov 15 00:00:00 EST 2016},
month = {Tue Nov 15 00:00:00 EST 2016}
}
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https://doi.org/10.1103/PhysRevB.94.201121
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    Works referencing / citing this record:

    Photoluminescence Characteristics of Multilayer HfSe 2 Synthesized on Sapphire Using Ion Implantation
    journal, January 2018

    • Tsai, Hsu‐Sheng; Liou, Jhe‐Wei; Setiyawati, Icuk
    • Advanced Materials Interfaces, Vol. 5, Issue 8
    • DOI: 10.1002/admi.201701619

    One-dimensional nearly free electron states in borophene
    journal, January 2019

    • Kong, Longjuan; Liu, Liren; Chen, Lan
    • Nanoscale, Vol. 11, Issue 33
    • DOI: 10.1039/c9nr03792f

    Quantum Hall Effect with Composites of Magnetic Flux Tubes and Charged Particles
    journal, June 2018

    One Dimensional Nearly Free Electron States in Borophene
    preprint, January 2019

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