2010
DOI: 10.1103/physrevb.81.104520
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2×2structure and charge inhomogeneity at the surface of superconductingBaFe2x

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Cited by 37 publications
(36 citation statements)
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“…On the contrary, the STM/STS studies on the '122' family are still controversial although great efforts have been put in the studies [5][6][7][8][9][10][11][12] , with main debate focused on where and how the crystal cleaves. For example, within the BaFe 2 As 2 (Ba122) unit cell, the Fe-As layers have a mirror symmetry around the Ba layer as shown in Fig.…”
mentioning
confidence: 99%
“…On the contrary, the STM/STS studies on the '122' family are still controversial although great efforts have been put in the studies [5][6][7][8][9][10][11][12] , with main debate focused on where and how the crystal cleaves. For example, within the BaFe 2 As 2 (Ba122) unit cell, the Fe-As layers have a mirror symmetry around the Ba layer as shown in Fig.…”
mentioning
confidence: 99%
“…Such 2×1 striped network has been reported frequently on the surface of various 122 Fe-based superconductors, resulting from a half layer of Ba/Sr/Ca after cleaving (see Refs. [21][22][23][24][25]. Furthermore, clover-like defects, around 1-2 nm in size, are found disrupting the 2×1 striped structure.…”
mentioning
confidence: 99%
“…There is some debate in the literature on the nature of the cleavage surface [20,21,[23][24][25][26][27]. We follow the view that this system, in order to avoid a polar surface, cleaves through the Ba layer, exposing half a Ba layer on either side of the cleave [26][27][28].…”
mentioning
confidence: 99%