Dissipative Quantum Criticality as a Source of Strange Metal Behavior

Round 1

Reviewer 1 Report

The author has well written the manuscript and organized form.  I have the following suggestion.

 

1. The author should explain the motivation of the work in the last part of the introduction section. 2.  Do you think the subject is novel or up-to-date? If so, does it fill a particular gap? 3. Talk about the relevant model and compare it to the current model, showing how they fill in the gaps in the current model. 4.  What specific improvements should the authors consider regarding the methodology? What further controls should be considered? 5. The author should provide some strong references for their concluding statement in lines 222, 223, and 224. 

 

 

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

In this manuscript, the authors built upon their previous works on dissipation-driven strange metal behavior and discussed the microscopic mechanism behind the increased dissipation. In particular, the authors proposed a model for the coupling between order parameter fluctuations and electron density diffusive modes to account for the enhanced damping. This model is exactly solvable, and discussion is focused on cuprates. The authors claim that similar mechanisms are expected to exist in other systems in general. Overall, I enjoy reading this work, and I think the results are valuable and insightful for understanding the strange metals. Should the authors have a chance, I have two minor comments.

 

1.     In the introduction, the authors wrote “In this work we will focus on quasi-2D systems like cuprates or pnictides, and discuss the role of dimensionality in the concluding remarks, Sec. 5.”. However, I was not able to find such discussion on dimensionality throughout the paper. It would be better if the authors can include this discussion when generalizing the model to other systems.

 

2.     It would be great if the authors can point some direction for experimentalists or propose some experiments that are most promising to test the order parameter fluctuations and diffusive modes model.

Author Response

Please see the attachment.

Author Response File: Author Response.pdf