The pseudogap: friend or foe of high T c ?

By M. Norman, D. Pines, C. Kallin. 2005

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Although nineteen years have passed since the discovery of high temperature cuprate superconductivity 1, there is still no consensus on its physical origin. This is in large part because of a lack of understanding of the state of matter out of which the superconductivity arises. In optimally and underdoped materials, this state exhibits a pseudogap at temperatures large compared to the superconducting transition temperature 2, 3. Although discovered only three years after the pioneering work of Bednorz and Müller, the physical origin of this pseudogap behavior and whether it constitutes a distinct phase of matter is still shrouded in mystery. In the summer of 2004, a band of physicists gathered for five weeks at the Aspen Center for Physics to discuss the pseudogap. In this perspective, we would like to summarize some of the results presented there and discuss the importance of the pseudogap phase in the context of strongly correlated electron systems. Contents PAGE Acknowledgments 730 References 730

Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/5323f3378b5f86e6fae7a8e182fd8f404bb6fab7

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Citations in the corpus

Two gaps make a high-temperature superconductor? (2007, background): “While Millis [15] opts for a diagram like the one in figure 1(a), Cho [17] prefers a situation where the pseudogap line meets the superconducting dome at x 0.16 (figures 1(b) and (c)); Norman et al [12] provide a comprehensive discussion of the three different possibilities.”
Pseudogap and Fermi surface topology in the two-dimensional Hubbard model. (2017, background): “A very debated topic in the physics of high-temperature superconductors is the nature of the “pseudogap” [1,2] in their phase diagram.”
Odd-frequency superconductivity (2017, background): “en order state in heavy fermion compounds like URu 2Si 2 (Mydosh and Oppeneer, 2011). Another example of the possible hidden order is the so-called pseudogap states of high-T c oxide superconductors (Norman et al., 2005). In both of these cases, we see well deﬁned spectroscopic and thermodynamic fea”
Progress and perspectives on electron-doped cuprates (2009, background): “Below a temperature scale T∗, underdoped cuprates are dominated by a suppression in various low-energy excitation spectra (Norman et al., 2005; Randeria, 2007; Timusk and Statt, 1999).”
Tracking the Footprints of Spin Fluctuations: A MultiMethod, MultiMessenger Study of the Two-Dimensional Hubbard Model (2020, background): “In contrast, the two-dimensional case relevant to both cuprate superconductors [12–15] and cold atomic gases [5–7] still holds many open questions, both in relation to its phase diagram as a function of interaction, particle density and temperature, and regarding the nature of excited states as well”