Atomistic simulation of Y-site substitution in multiferroich-YMnO3

Electronic structure in a one-Fe Brillouin zone of the iron pnictide superconductorsCsFe2As2andRbFe2As

“…First, our data shows one Fermi surface pocket of d xy orbital symmetry at the zone center, while theoretical models suggest that either one pocket with d xy symmetry or two pockets with d xz /d yz symmetry can exist around the zone center of the 1-Fe BZ [1][2][3][4][5][6][7][8][9][10]. Owing to the use of glide-mirror symmetry, the latter possibility is ruled out.…”

“…On the other hand, many theoretical models of band structures have been developed in the 1-Fe BZ for its simplicity [1][2][3][4][5][6][7][8][9][10], and the importance of the fundamental Fe square lattice has been suggested by some experiments [24][25][26]. Though the 2-Fe BZ should be adopted for describing the full symmetry of iron-pnictides, the 1-Fe BZ sometimes comes with convenience.…”

“…The electronic and magnetic properties heavily rely on the multiband interactions between different electron and hole pockets near the Fermi level. At the fundamental level, though many theoretical models were constructed on the basis of the socalled 1-Fe Brillouin zone (BZ) with an emphasis of the basic square lattice of iron atoms [1][2][3][4][5][6][7][8][9][10], most electronic structure measurements were interpreted in the 2-Fe BZ [11][12][13][14][15][16][17][18][19][20]. Whether the 1-Fe BZ is valid in a real system is still an open question.…”

Opening of the superconducting gap in the hole pockets of Ba(Fe1−xCox)2Mansart1, Papalazarou2, Brouet3 et al. 2012Phys. Rev. B5040View full textAdd to dashboardCite

“…In fact, it has been more difficult to clearly image the electron pockets than the hole pockets with ARPES [9][10][11]. Recently, an ARPES study resolved them in more details [12], but proposed a structure so different from theory, that it clearly calls for more investigation.In this paper, we report ARPES measurements in Ba(Fe 0.92 Co 0.08 ) 2 As 2 , which corresponds to optimal Co doping for superconductivity (T c =23K). Similar features are found for other members of the BaFe 2 As 2 family [13].…”

“…In fact, it has been more difficult to clearly image the electron pockets than the hole pockets with ARPES [9][10][11]. Recently, an ARPES study resolved them in more details [12], but proposed a structure so different from theory, that it clearly calls for more investigation.…”