Fermi surface transformation at the pseudogap critical point of a cuprate superconductor

Fang, Yawen; Grissonnanche, G.; Legros, Anaëlle; Verret, Simon; Laliberté, F.; Collignon, Clément; Ataei, Amirreza; Dion, Maxime; Zhou, Jianshi; Graf, David; Lawler, Michael J.; Goddard, Paul; Taillefer, Louis; Ramshaw, B. J.

doi:10.1038/s41567-022-01514-1

Cited by 28 publications

(18 citation statements)

References 67 publications

(81 reference statements)

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“…Finally, the BFK model also represents an effective description of the doped Mott systems in the form of t-J-U Hubbard models [26]. As such, our results may also play an important role in the understanding of such systems [50][51][52].…”

Section: (C)mentioning

confidence: 64%

Kondo destruction and fixed-point annihilation in a Bose-Fermi Kondo model

Hu¹,

Si²

2022

Preprint

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Quantum criticality that goes beyond the Landau framework of order-parameter fluctuations is playing a central role in elucidating the behavior of strange metals. A prominent case appears in Kondo lattice systems, which have been extensively analysed in terms of an effective Bose-Fermi Kondo model. Here, a spin is simultaneously coupled to conduction electron bands and gapless vector bosons that represent magnetic fluctuations. The Bose-Fermi Kondo model features interacting fixed points of Kondo destruction with such properties as dynamical Planckian ( ω/kBT ) scaling and loss of quasiparticles. Here we carry out a renormalization-group analysis of the model with spin isotropy and identify pair-wise annihilations of the fixed points as the spectrum of the bosonic bath evolves. Our analysis not only provides an essentially complete understanding of the previous numerical results of an SU(2)-symmetric model, but also reveals a surprising feature of sequential fixed-point annihilation. Our results lay the foundation for the understanding of quantum criticality in spin-isotropic heavy-fermion metals as well as in doped Mott-Hubbard systems.

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Section: (C)mentioning

confidence: 64%

Kondo destruction and fixed-point annihilation in a Bose-Fermi Kondo model

Hu¹,

Si²

2022

Preprint

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“…6 of Appendix C. We see that the quasiparticle lifetime strongly increases when we reach the doping level p = 0.22. This doping level was considered as the ending point of the pseudogap phase in Bi-2212 cuprate [33,48] where changes in Fermi surface topology have been detected [33,49]. We now address the question of the pseudogap signature with temperature [7,24,25,27,50,51].…”

Section: II Results and Discussionmentioning

confidence: 99%

Spin singlet and quasiparticles excitations in cuprate superconductors

M.¹,

Alekhin²,

Gu³

et al. 2022

Preprint

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“…These observations include energy over temperature scaling of inelastic neutron scattering (Schröder et al, 2000) and optical conductivity data (Prochaska et al, 2020), and an abrupt change of the Fermi surface volume across the QCP as evidenced by de Haas-van Alphen (Shishido et al, 2005) and Hall effect measurements (Paschen et al, 2004;Friedemann et al, 2010;Custers et al, 2012;Martelli et al, 2019). The sudden reconstruction from a small to a large Fermi surface characterizes a (partial, 4f selective) localization-delocalization transition, and is emerging as a potential universal organizing principle with supporting evidence in a variety of other correlated materials classes (Paschen and Si, 2021a), including the cuprates (Badoux et al, 2016;Fang et al, 2022). The interacting nature of the fixed point describing a Kondo-destruction QCP (Si et al, 2001;Coleman et al, 2001;Senthil et al, 2004) means that k B T is the only energy scale, suggesting that the scattering rate as appearing in the electrical resistivity would be linearly proportional to k B T .…”

Section: Introductionmentioning

confidence: 83%

Is the optical conductivity of heavy fermion strange metals Planckian?

Li¹,

Kono²,

Si³

et al. 2022

Preprint

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Strange metal behavior appears across a variety of condensed matter settings and beyond, and achieving a universal understanding is an exciting prospect. The beyond-Landau quantum criticality of Kondo destruction has had considerable success in describing the behavior of strange metal heavy fermion compounds, and there is some evidence that the associated partial localization-delocalization nature can be generalized to diverse materials classes. Other potential overarching principles at play are also being explored. An intriguing proposal is that Planckian scattering, with a rate of k B T / , captures the linear temperature dependence of the (dc) electrical resistivity, which is a hallmark of strange metal behavior. Here we extend a previously introduced analysis scheme based of the Drude description of the dc resistivity to optical conductivity data. When they are well described by a simple (ac) Drude model, the scattering rate can be directly extracted. This avoids the need to determine the ratio of charge carrier concentration to effective mass, which has complicated previous analyses based on the dc resistivity. However, we point out that strange metals may exhibit strong deviations from Drude behavior, as exemplified by the "extreme" strange metal YbRh 2 Si 2 . This calls for alternative approaches, and we point to the power of scaling relationships in terms of temperature and energy (or frequency).

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Fermi surface transformation at the pseudogap critical point of a cuprate superconductor

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Cited by 28 publications

References 67 publications

Kondo destruction and fixed-point annihilation in a Bose-Fermi Kondo model

Kondo destruction and fixed-point annihilation in a Bose-Fermi Kondo model

Spin singlet and quasiparticles excitations in cuprate superconductors

Is the optical conductivity of heavy fermion strange metals Planckian?

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