Angle-Resolved Photoemission Spectroscopy on by Junfeng He

By Junfeng He

This publication typically makes a speciality of the learn of the high-temperature superconductor Bi2Sr2CaCu2O8+δ (Bi2212) and single-layer FeSe movie grown on SrTiO3 (STO) substrate through angle-resolved photoemission spectroscopy (ARPES). It presents the 1st digital facts for the starting place of the anomalous high-temperature superconductivity in single-layer FeSe grown on SrTiO3 substrate. coexisted sharp-mode couplings were pointed out in superconducting Bi2212. the 1st ARPES research on single-layer FeSe/STO motion pictures has supplied key insights into the digital beginning of superconductivity during this method. A section diagram and digital indication of excessive Tc and insulator to superconductor crossover were tested within the single-layer FeSe/STO movies. Readers will locate crucial info at the options used and fascinating actual phenomena saw by way of ARPES.

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Additional info for Angle-Resolved Photoemission Spectroscopy on High-Temperature Superconductors: Studies of Bi2212 and Single-Layer FeSe Film Grown on SrTiO3 Substrate

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Phys. Rev. Lett. 101(5), 057003 (2008) 48. : A key role for unusual spin dynamics in ferropnictides. Nat. Phys. 5(2), 141–145 (2009) 49. : Antiferromagnetic correlation and the pairing mechanism of the cuprates and iron pnictides: a view from the functional renormalization group studies. Europhys. Lett. 85(3), 37005 (2009) 50. 0). Phys. Rev. B 82(18), 180520(R) (2010) 51. : Transport properties and anisotropy of Rb1−x Fe2−y Se2 single crystals. Phys. Rev. B 83(18), 184521 (2011) 52. : Fe-based superconductivity with Tc = 31 K bordering an antiferromagnetic insulator in (Tl, K)Fex Se2 .

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The other scenario is based on the localized picture. In the localized picture, electrons in iron-based superconductors are not considered to be itinerant, but strongly correlated as the ones in cuprates. By using slave-spin approach, Si et al. suggested that the Mott transition may take place when the parent compound of the ironbased superconductors is doped with carriers [57]. The localized models can directly explain the insulator to superconductor transition as well as the antiferromagnetism in the parent compound.

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