Electronic properties of iron arsenic high temperature superconductors revealed by angle resolved photoemission spectroscopy (ARPES)

2009 ◽  
Vol 469 (9-12) ◽  
pp. 491-497 ◽  
Author(s):  
Chang Liu ◽  
Takeshi Kondo ◽  
A.D. Palczewski ◽  
G.D. Samolyuk ◽  
Y. Lee ◽  
...  
Keyword(s):  
High Temperature ◽  
Electronic Properties ◽  
High Temperature Superconductors ◽  
Photoemission Spectroscopy ◽  
Angle Resolved Photoemission Spectroscopy

Incoherent strange metal sharply bounded by a critical doping in Bi2212

Science ◽  
2019 ◽  
Vol 366 (6469) ◽  
pp. 1099-1102 ◽  
Author(s):  
Su-Di Chen ◽  
Makoto Hashimoto ◽  
Yu He ◽  
Dongjoon Song ◽  
Ke-Jun Xu ◽  
...  
Keyword(s):  
High Temperature Superconductors ◽  
Quantum Critical Point ◽  
Critical Value ◽  
Photoemission Spectroscopy ◽  
Metallic State ◽  
Zone Boundary ◽  
Brillouin Zone Boundary ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Normal Metals ◽  
Superconducting Fluctuations

In normal metals, macroscopic properties are understood using the concept of quasiparticles. In the cuprate high-temperature superconductors, the metallic state above the highest transition temperature is anomalous and is known as the “strange metal.” We studied this state using angle-resolved photoemission spectroscopy. With increasing doping across a temperature-independent critical value pc ~ 0.19, we observed that near the Brillouin zone boundary, the strange metal, characterized by an incoherent spectral function, abruptly reconstructs into a more conventional metal with quasiparticles. Above the temperature of superconducting fluctuations, we found that the pseudogap also discontinuously collapses at the very same value of pc. These observations suggest that the incoherent strange metal is a distinct state and a prerequisite for the pseudogap; such findings are incompatible with existing pseudogap quantum critical point scenarios.

scholarly journals Universal features in the photoemission spectroscopy of high-temperature superconductors

2013 ◽  
Vol 110 (44) ◽  
pp. 17774-17777 ◽  
Author(s):  
J. Zhao ◽  
U. Chatterjee ◽  
D. Ai ◽  
D. G. Hinks ◽  
H. Zheng ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Superconductors ◽  
Photoemission Spectroscopy
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