Photoemission and density functional theory study of Ir(111); energy band gap mapping

Pletikosić, Ivo; Kralj, Marko; Šokčević, Damir; Brako, Radovan; Lazić, Predrag; Pervan, Petar (2010) Photoemission and density functional theory study of Ir(111); energy band gap mapping. Journal of Physics: Condensed Matter, 22 (13). pp. 135006-1. ISSN 0953-8984

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Abstract

We have performed combined angle resolved photoemission spectroscopy (ARPES) experiments and density functional theory (DFT) calculations of the electronic structure of Ir(111) surface, with the focus on the existence of energy band gaps. The investigation was motivated by the experimental results suggesting Ir(111) as an ideal support for the growth of weakly bonded graphene. Therefore, our prime interest was electronic structure around the K symmetry point. In accordance with DFT calculation, ARPES has shown a wide energy band gap with shape of parallelogram centred around the K point. Within the gap three surface states were identified ; one just below the Fermi level and two spin-orbit split surface states at the bottom of the gap.

Item Type:	Article
Uncontrolled Keywords:	iridium; band structure; graphene; electronic properties; angle resolved photoemission; low index single crystal surfaces; density functional theory
Subjects:	NATURAL SCIENCES > Physics > Condensed Matter Physics
Divisions:	Theoretical Physics Division
Projects:	Project title Project leader Project code Project type Elektronska i kristalna struktura poduprtih samoorganiziranih nano-sistema [106101] Petar Pervan 035-0352828-2840 MZOS Površine i nanostrukture: Teorijski pristupi i numerički proračuni [5180] Radovan Brako 098-0352828-2863 MZOS
Depositing User:	Predrag Lazić
Date Deposited:	16 Apr 2013 08:33
URI:	http://fulir.irb.hr/id/eprint/494
DOI:	10.1088/0953-8984/22/13/135006

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