Unraveling the Pairing Mechanism in Cuprate Superconductors

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In summary, the conversation discusses the role of the Mott phase in understanding superconductivity in cuprates. The paper "Is there a glue in cuprate superconductors?" by Anderson argues that the proximity of the superconducting state to the Mott phase is crucial in understanding the pairing mechanism. The question is whether there are any experimental observations confirming this point, as most research focuses on finding the "glue" that binds Cooper pairs together. A possible confirmation of this theory is found in a study by A.N. Pasupathy et al. in 2008, which supports Anderson's RVB scenario.
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EdB
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Hello everybody,

this question is mainly addressed to people interested or involved in superconductivity.
In the paper "Is there a glue in cuprate superconductors?" (Link - 2007) Anderson argues that the most important element to understand the pairing mechanism in cuprates is the proximity of the superconducting state to the Mott phase. If I'm not wrong, this would mean that superconductivity arises due to the interaction with high-energy excitations in cuprates, determined by the charge-transfer gap of the undoped parent compound and the superexchange interaction.
To your knowledge, are there any experimental observations confirming this point? By looking in the literature, it seems that people just take care of finding the mysterious bosonic glue that binds the Cooper pairs together...

Thanks in advance for your answers!
 
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  • #2
Try this:

A.N. Pasupathy et al., Science v.320, p.196 (2008).

That seems to be consistent with Abderson's RVB scenario.

Zz.
 

1. What is the pairing mechanism in cuprates?

The pairing mechanism in cuprates refers to the process by which electrons in these materials form pairs and exhibit superconductivity at high temperatures. This phenomenon is still not fully understood but is believed to involve strong electron-electron interactions and the formation of Cooper pairs through the exchange of virtual phonons.

2. How do cuprates exhibit high-temperature superconductivity?

Cuprates exhibit high-temperature superconductivity due to a combination of factors, including their unique crystal structure, high electron density, and strong electron-electron interactions. These factors work together to create an environment that promotes the formation of Cooper pairs and allows for superconductivity to occur at higher temperatures than in traditional superconductors.

3. What is the role of doping in the pairing mechanism of cuprates?

Doping, or the controlled introduction of impurities into the crystal structure of cuprates, plays a crucial role in the pairing mechanism of these materials. Doping alters the electronic properties of cuprates, creating an optimal environment for the formation of Cooper pairs and increasing the critical temperature at which superconductivity occurs.

4. How do different crystal structures affect the pairing mechanism in cuprates?

The crystal structure of cuprates can have a significant impact on the pairing mechanism and resulting superconductivity. Different crystal symmetries can promote or hinder the formation of Cooper pairs, leading to variations in critical temperature and other properties. This is why cuprates with different crystal structures can exhibit varying levels of superconductivity.

5. Is the pairing mechanism in cuprates fully understood?

No, the pairing mechanism in cuprates is still a subject of ongoing research and is not fully understood. While many theories and models have been proposed, there is still no consensus on the exact mechanism responsible for high-temperature superconductivity in these materials. Further research and experimentation are needed to gain a better understanding of this phenomenon.

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