Electronic structure of new LiFeAs high-T c superconductor

Electronic Structure of NaFeAs Superconductor: LDA + DMFT Calculations Compared with ARPES Experiment

“…The experimentally obtained crystallographic positions are the following Fe(2b) (0.75, 0.25, 0.0), Na(2c) (0.25, 0.25, z N a ), As(2c) (0.25, 0.25, z As ), z As =0.20278, z N a =0.64602 [25]. That is quite similar to LiFeAs crystal structure [9,11].…”

“…1 we show LDA band dispersions (on the right) and densities of states (DOS) (on the left) calculated within FP-LAPW method [26]. Bands in the vicinity of the Fermi level have predominantly Fe-3d character and are essentially similar to the previously studied case of LiFeAs described elsewhere [11,12]. The As-4p states belong to the -2 to -5 eV energy interval.…”

A Unified Theory for the Cuprates, Iron-Based and Similar Superconducting Systems: Application for Spin and Charge Excitations in the Hole-Doped Cuprates

“…This is confirmed in electronic-structure calculations [10][11][12][13][14][15][16]; however, such hybridization is found in antibonding and bonding states which lie at least ∼ 1 eV away from the Fermi level (E F ), while the states at the close vicinity of E F are non- * Electronic address: jashkenazi@miami.edu bonding and of almost a pure Fe(3d) nature [12][13][14][15][16].…”

“…Similarly to the cuprates [6], the FeSCs are derived from an undoped "parent" compound which is generally magnetically ordered [7][8][9] at low temperatures and becomes SC under electron-or hole-doping. Also, both systems are characterized by a layered structure and a quasi-twodimensional electronic structure [10][11][12][13][14][15][16].A variety of normal-state properties including, e.g., the transport properties (ı.e. resistivity, Hall coefficient and thermoelectric power) of both the cuprates [17][18][19][20][21] and the FeSCs [3,22,23] are characterized by a remarkably similar anomalous behavior.…”

“…Similarly to the cuprates [6], the FeSCs are derived from an undoped "parent" compound which is generally magnetically ordered [7][8][9] at low temperatures and becomes SC under electron-or hole-doping. Also, both systems are characterized by a layered structure and a quasi-twodimensional electronic structure [10][11][12][13][14][15][16].…”