Repositorio
Institucional

Silva, W. S.

Stiehler, C.#Soares, E. A.#Bittar, E. M.#Cezar, J. C.#Kuhlenbeck, H.#Freund, H-J#Cisternas, E.#Stavale, F.

Hydrogen-induced metallization on the ZnO(0001) surface

AMER PHYSICAL SOC

PHYSICAL REVIEW B

en

The formation of hydrogen overlayers on the Zn-terminated ZnO(0001) surface has been reexamined by angle-resolved photoemission spectroscopy (ARPES). While low-energy electron diffraction patterns display the same (1 x 1) symmetry for different surface preparations, the electronic structure feature close to the Fermi level shows the formation of electron pockets, compatible with hydrogen-induced metallic states. Using ARPES and density functional theory (DFT) calculations, we show that hydrogen adspecies can also lead to metallization of this zinc-oxide surface in a similar manner as observed previously on ZnO(10 (1) over bar0) and O-terminated ZnO(000 (1) over bar). Importantly, our DFT calculations indicate that these electron pockets are formed by sp hybridized states and therefore the angular distribution of the emitted photoelectron is significantly suppressed at the normal emission.

Artículo original

We gratefully acknowledge the assistance of the LNLS staff during the beam time. This work was supported by CNPq, FAPERJ, Alexander von Humboldt Foundation, and by Max-Planck Partnergroup Program grants. W.S and F.S. thank Professor Yves Petroff and Professor Emilia Annese for their critical reading. C.S. is thankful for the fellowship granted by the Studienstiftung des deutschen Volkes. E.A.S. is thankful for the FAPEMIG financial support. J.C.C. acknowledges CNPq Grant No. 401870/2013-8. E.C. is thankful for support from the DIUFRO Project No. DI17-0027. Powered@NLHPC: This research was partially supported by the supercomputing infrastructure of the NLHPC (ECM-02).

Agradecemos la ayuda del personal del LNLS durante el tiempo de exposición al haz. Este trabajo fue financiado por el CNPq, la FAPERJ, la Fundación Alexander von Humboldt y las becas del Programa Max-Planck Partnergroup. W.S. y F.S. agradecen a los profesores Yves Petroff y Emilia Annese su lectura crítica. C.S. agradece la beca otorgada por la Studienstiftung des Deutschen Volkes. E.A.S. agradece el apoyo financiero de la FAPEMIG. J.C.C. agradece la beca del CNPq n.° 401870/2013-8. E.C. agradece el apoyo del proyecto DIUFRO n.° DI17-0027. Impulsado por el NLHPC: Esta investigación fue parcialmente financiada por la infraestructura de supercomputación del NLHPC (ECM-02).

10.1103/PhysRevB.98.155416

pdf

http://dx.doi.org/10.1103/PhysRevB.98.155416

Materials Science, Multidisciplinary# Physics, Applied# Physics, Condensed Matter

Física de la Materia Condensada

Física Atómica, Molecular y Química

Físico-Química

WOS:000447301700005

Hydrogen-induced metallization on the ZnO(0001) surface

hdl.handle.net/21.11116/0000-0002-706C-7

Artículo original

version publicada

AMER PHYSICAL SOC

PHYSICAL REVIEW B

Ciencia de Materiales, Multidisciplinaria# Física Aplicada# Física, Materia Condensada

2469-9950

en

CNPq 401870/2013-8#FAPERJ#Alexander von Humboldt Foundation#Max-Planck Partnergroup#UFRO DI17-0027

CNPq 401870/2013-8

FAPERJ

Alexander von Humboldt Foundation

Max-Planck

Studienstiftung des deutschen Volkes

FAPEMIG

UFRO DI17-0027

NLHPC ECM-02

We gratefully acknowledge the assistance of the LNLS staff during the beam time. This work was supported by CNPq, FAPERJ, Alexander von Humboldt Foundation, and by Max-Planck Partnergroup Program grants. W.S and F.S. thank Professor Yves Petroff and Professor Emilia Annese for their critical reading. C.S. is thankful for the fellowship granted by the Studienstiftung des deutschen Volkes. E.A.S. is thankful for the FAPEMIG financial support. J.C.C. acknowledges CNPq Grant No. 401870/2013-8. E.C. is thankful for support from the DIUFRO Project No. DI17-0027. Powered@NLHPC: This research was partially supported by the supercomputing infrastructure of the NLHPC (ECM-02).

pdf

dorada#verde

metadata

metadata

207

215