Theory of the strange metal Sr
 3
 Ru
 2
 O
 7

Mousatov, Connie H.; Berg, Erez; Hartnoll, Sean A.

doi:10.1073/pnas.1915224117

Cited by 30 publications

(36 citation statements)

References 48 publications

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“…Near a nematic QCP, the effective electron-electron interactions are believed to become long ranged, rendering the whole of the Fermi surface "hot," the electronic states incoherent, and the transport properties NFL-like [41]. It has been argued, however, that a correct treatment of the electronphonon coupling in such systems will preserve the integrity of the quasiparticles and recover Fermi liquid behavior [36,37].…”

Section: Discussionmentioning

confidence: 99%

Non-Fermi liquid transport in the vicinity of the nematic quantum critical point of superconducting FeSe1−xSx

Huang

Hosoi

Čulo³

et al. 2020

Phys. Rev. Research

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Non-Fermi liquids are strange metals whose physical properties deviate qualitatively from those of conventional metals due to strong quantum fluctuations. In this paper, we report transport measurements on the FeSe 1−x S x superconductor, which has a quantum critical point of a nematic order without accompanying antiferromagnetism. We find that in addition to a linear-in-temperature resistivity ρ xx ∝ T , which is close to the Planckian limit, the Hall angle varies as cot θ H ∝ T 2 and the low-field magnetoresistance is well scaled as ρ xx /ρ xx ∝ tan 2 θ H in the vicinity of the nematic quantum critical point. This set of anomalous charge transport properties show striking resemblance with those reported in cuprate, iron-pnictide, and heavy fermion superconductors, demonstrating that the critical fluctuations of a nematic order with q ≈ 0 can also lead to a breakdown of the Fermi liquid description.

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Section: Discussionmentioning

confidence: 99%

Non-Fermi liquid transport in the vicinity of the nematic quantum critical point of superconducting FeSe1−xSx

Huang

Hosoi

Čulo³

et al. 2020

Phys. Rev. Research

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“…The creation of new Fermi pockets, and the additional density of states associated with these, will open new channels for inter-and intraband scattering. Moreover, there are a large number of bands with turning points expected in the vicinity of the Fermi level; recent work has emphasized the potential for strong scattering for all states in the Brillouin zone to be associated with the presence of hot spots localized in k space (30). We note, however, that this is a complex system with both a structural and a magnetic transition occurring here, and we do not exclude that additional contributions from electron-lattice and electron-magnon coupling could contribute to the changes observed experimentally.…”

Section: Significancementioning

confidence: 99%

Electronically driven spin-reorientation transition of the correlated polar metal Ca ₃ Ru ₂ O ₇

Marković

Watson

Clark

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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The interplay between spin–orbit coupling and structural inversion symmetry breaking in solids has generated much interest due to the nontrivial spin and magnetic textures which can result. Such studies are typically focused on systems where large atomic number elements lead to strong spin–orbit coupling, in turn rendering electronic correlations weak. In contrast, here we investigate the temperature-dependent electronic structure ofCa3Ru2O7, a4doxide metal for which both correlations and spin–orbit coupling are pronounced and in which octahedral tilts and rotations combine to mediate both global and local inversion symmetry-breaking polar distortions. Our angle-resolved photoemission measurements reveal the destruction of a large hole-like Fermi surface upon cooling through a coupled structural and spin-reorientation transition at 48 K, accompanied by a sudden onset of quasiparticle coherence. We demonstrate how these result from band hybridization mediated by a hidden Rashba-type spin–orbit coupling. This is enabled by the bulk structural distortions and unlocked when the spin reorients perpendicular to the local symmetry-breaking potential at the Ru sites. We argue that the electronic energy gain associated with the band hybridization is actually the key driver for the phase transition, reflecting a delicate interplay between spin–orbit coupling and strong electronic correlations and revealing a route to control magnetic ordering in solids.

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“…There are several possible origins for Planckian T -linear resistivity, including electronphonon scattering [17], 'hot-spot' electron-electron scattering [18] and scattering off quantum critical fluctuations [17]. Given that the Debye temperature Θ D ≈ 400 K in cuprates [19], it is unfeasible to associate T -linear resistivity that persists down to the mK range [10,11] to electron-phonon scattering.…”

Section: Introductionmentioning

confidence: 99%

Possible superconductivity from incoherent carriers in overdoped cuprates

et al. 2021

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There is now compelling evidence that the normal state of superconducting overdoped cuprates is a strange metal comprising two distinct charge sectors, one governed by coherent quasiparticle excitations, the other seemingly incoherent and characterized by non-quasiparticle (Planckian) dissipation. The zero-temperature superfluid density n_s(0)ns(0) of overdoped cuprates exhibits an anomalous depletion with increased hole doping pp, falling to zero at the edge of the superconducting dome. Over the same doping range, the effective zero-temperature Hall number n_{\rm H}(0) transitions from pp to 1 + pp. By taking into account the presence of these two charge sectors, we demonstrate that in the overdoped cuprates Tl_22Ba_22CuO_{6+\delta}6+δ and La_{2-x}2−xSr_xxCuO_44, the growth in n_s(0)ns(0) as pp is decreased from the overdoped side may be compensated by the loss of carriers in the coherent sector. Such a correspondence is contrary to expectations from conventional BCS theory and implies that superconductivity in overdoped cuprates emerges uniquely from the sector that exhibits incoherent transport in the normal state.

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Theory of the strange metal Sr ₃ Ru ₂ O ₇

Cited by 30 publications

References 48 publications

Non-Fermi liquid transport in the vicinity of the nematic quantum critical point of superconducting FeSe1−xSx

Non-Fermi liquid transport in the vicinity of the nematic quantum critical point of superconducting FeSe1−xSx

Electronically driven spin-reorientation transition of the correlated polar metal Ca ₃ Ru ₂ O ₇

Possible superconductivity from incoherent carriers in overdoped cuprates

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Theory of the strange metal Sr 3 Ru 2 O 7

Cited by 30 publications

References 48 publications

Non-Fermi liquid transport in the vicinity of the nematic quantum critical point of superconducting FeSe1−xSx

Non-Fermi liquid transport in the vicinity of the nematic quantum critical point of superconducting FeSe1−xSx

Electronically driven spin-reorientation transition of the correlated polar metal Ca 3 Ru 2 O 7

Possible superconductivity from incoherent carriers in overdoped cuprates

Contact Info

Product

Resources

About

Theory of the strange metal Sr ₃ Ru ₂ O ₇

Electronically driven spin-reorientation transition of the correlated polar metal Ca ₃ Ru ₂ O ₇