2012
DOI: 10.1007/s11434-012-5405-7
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The orbital characters of low-energy electronic structure in iron-chalcogenide superconductor K x Fe2−y Se2

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Cited by 11 publications
(10 citation statements)
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References 32 publications
(48 reference statements)
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“…1h,j ), indicating that the nematic order is suppressed 6 . Considering that this electronic structure is similar to that in other heavily electron-doped iron chalcogenides, the electronic states near Fermi energy in K-dosed FeSe should as well be contributed by electrons with d xz , d yz and d xy orbitals 31 . There is no band structure corresponding to an intermediate doping level, so we conclude that the electron doping induced by K dosing is confined to the topmost single-unit-cell layer of FeSe.…”
Section: Resultssupporting
confidence: 55%
“…1h,j ), indicating that the nematic order is suppressed 6 . Considering that this electronic structure is similar to that in other heavily electron-doped iron chalcogenides, the electronic states near Fermi energy in K-dosed FeSe should as well be contributed by electrons with d xz , d yz and d xy orbitals 31 . There is no band structure corresponding to an intermediate doping level, so we conclude that the electron doping induced by K dosing is confined to the topmost single-unit-cell layer of FeSe.…”
Section: Resultssupporting
confidence: 55%
“…(a) Doping dependence of the photoemission intensity distributions along the Γ-M direction in Rb x Fe 2−y Se 2−z Te z and K x Fe 2−y Se 2−z S z , and the corresponding second derivatives with respect to energy. The band structures were determined for the superconducting phases of these compounds[37]. The white double-headed arrows indicate the bandwidth of the β band.…”
mentioning
confidence: 99%
“…Figure 1(a) shows the resistance (R) as a function of temperature (T) for the undoped Rb-245 superconductor measured at different pressures. It can be seen that the R-T curve demonstrates a remarkable hump around 200 K. The resistance hump is suggested to have originated from the competition between the insulating AFM phase and the superconducting phase [27,28,36]. Upon increasing pressure, the hump is suppressed significantly, same as that seen in the pressurized K-245 and Tl(Rb)-245 superconductors [30,32].…”
Section: Resultsmentioning
confidence: 78%
“…Soon after, the superconductivity was also found in Rb-245 and Cs-245 compounds [10][11][12][13][14][15]. Then, the characteristics of lattice, electronic and magnetic structures have been widely reported for these superconductors, such as the existence of phase separation [16][17][18][19], the superlattice of ordered Fe vacancies and its connection to the AFM ordered phase [20][21][22][23], absence of hole pockets at the Fermi surface [24][25][26], temperature-induced orbital selection [27][28][29]. All of these features are shown neither in the iron arsenide nor in copper oxide superconductors, therefore the complexity of understanding its superconducting mechanism is raised to a new level.…”
Section: Introductionmentioning
confidence: 99%