Heat transport in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi>Bi</mml:mi><mml:mrow><mml:mn>2</mml:mn><mml:mo>+</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi>Sr</mml:mi><mml:mrow><mml:mn>2</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi>CuO</mml:mi><mml:mrow><mml:mn>6</mml:mn><mml:mo>+</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>: Departure from the Wiedemann-Franz law i

Proust, Cyril; Behnia, Kamran; Bel, Romain; Maude, D. K.; Vedeneev, S. I.

doi:10.1103/physrevb.72.214511

Cited by 43 publications

(50 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the only prior study on an underdoped cuprate (Bi-2201), the Lorenz ratio was found to be larger than expected: L/L 0 > 1.0. 50 However, values of L/L 0 exceeding 1.0 were observed only in samples whose normal state resistivity ρ a (T ) showed an upturn at low T , achieving residual values ρ 0 > 200 µΩ cm. 50 The violation was attributed to a metal-insulator transition.…”

mentioning

confidence: 95%

See 1 more Smart Citation

Wiedemann-Franz law in the underdoped cuprate superconductorYBa2Cu3Oy

et al. 2016

View full text Add to dashboard Cite

The electrical and thermal Hall conductivities of the cuprate superconductor YBa2Cu3Oy, σxy and κxy, were measured in a magnetic field up to 35 T, at a hole concentration (doping) p = 0.11. In the T = 0 limit, we find that the Wiedemann-Franz law, κxy/T = (π 2 /3)(kB/e) 2 σxy, is satisfied for fields immediately above the vortex-melting field Hvs. This rules out the existence of a vortex liquid at T = 0 and it puts a clear constraint on the nature of the normal state in underdoped cuprates, in a region of the doping phase diagram where charge-density-wave order is known to exist. As the temperature is raised, the Lorenz ratio, Lxy = κxy/(σxyT ), decreases rapidly, indicating that strong small-q scattering processes are involved.

show abstract

mentioning

confidence: 95%

“…50 In all cases, the test was done on longitudinal conductivities (κ xx and σ xx ). Because of the large phonon term in κ xx , extracting the electronic term is done by extrapolating κ xx /T to T = 0.…”

mentioning

confidence: 99%

Wiedemann-Franz law in the underdoped cuprate superconductorYBa2Cu3Oy

et al. 2016

View full text Add to dashboard Cite

show abstract

“…We cannot calculate the numerical value of L. Since numerical data of empirical quantities, through which it is expressed, are unknown. However, from the paper [24] of Proust et al we know that L is constant for fixed doping. Therefore, Eq.…”

Section: B Abdullaev D B Abdullaev C -H Park M M Musakhanovmentioning

confidence: 99%

“…The downturn has been widely accepted as a characteristic of non-Landau Fermi liquid behavior. As the next evidence for the non-Fermi liquid QPs property was recognized the fact that the cuprate Lorentz ratio was significantly larger than Sommerfeld's value [24].…”

Section: Resistivity Temperature Upturnmentioning

confidence: 99%

See 1 more Smart Citation

Normal state pair nematicity and hidden magnetic order and metal-insulator (fermionboson) crossover origin of pseudogap phase of cuprates II

Abdullaev¹,

Abdullaev²,

Park³

et al. 2017

Nanosystems: Phys. Chem. Math.

View full text Add to dashboard Cite

In the present paper II, we will gain an understanding of the nematicity, insulating ground state (IGS), nematicity to stripe phase transition, Fermi pockets evolution, and resistivity temperature upturn, as to be metal -insulator (fermion-boson)-crossover (MIC) phenomena for the pseudogap (PG) region of cuprates. While in the paper I [Abdullaev B., et al. arXiv:cond-mat/0703290], we obtained an understanding of the observed heat conductivity downturn, anomalous Lorentz ratio, insulator resistivity boundary, nonlinear entropy as manifestations of the same MIC. The recently observed nematicity and hidden magnetic order are related to the PG pair intra charge and spin fluctuations. We will try to obtain an answer to the question; why ground state of YBCO is Fermi liquid oscillating and of Bi-2212 is insulating? We will also clarify the physics of the recently observed MIC results of Lalibert et al. [arXiv:1606.04491] and explain the long-discussed transition of the electric charge density from doping to doping+1 dependence at the critical doping. We predict that at the upturns this density should have the temperature dependences n ∼ T 3 n 2 for T → 0, where n 2 is density for dopings close to the critical value. We understood that the upturns before and after the first critical doping have the same nature. We will find understanding of all above mentioned phenomena within PG pair physics.Keywords: high critical temperature superconductivity, cuprate, metal-insulator-crossover, temperature-doping phase diagram, resistivity temperature upturn, insulating ground state, nematicity and stripe phases, Fermi pockets evolution.

show abstract

Effect of the Pseudogap on the Quasiparticle Transport from the Static Limit to Finite Energy for Cuprate Superconductors

Zhao

Wan

et al. 2018

Annalen der Physik

View full text Add to dashboard Cite

Within the renormalized t‐J model and self‐consistent mean field theory, the doping and energy dependences of the quasiparticle transport is studied in cuprate superconductors, especially in the underdoped region. By calculating the doping and energy dependence of the ratio of the thermal conductivity to the electrical conductivity at temperature T, (the form of the Wiedemann–Franz law), it is shown that increases with the increase of energy from underdoping to overdoping, whereas it is constant in heavily overdoped cuprate superconductors and recovers the result of the Wiedemann–Franz law at zero energy. The slope of is the highest in the underdoped region, decreases with increasing the doping concentration in the whole doping range, and reaches zero in the heavily overdoped region. In particular, the ratio as a function of energy exhibits a characteristic peak over the transition from underdoping to overdoping, and the position of the characteristic peak ωWF decreases monotonically upon increasing doping concentration. Therefore, these results indicate that the slope of and characteristic peaks as a function of doping are related to the appearance of the pseudogap in cuprate superconductors.

show abstract

Heat transport inBi2+xSr2−xCuO6+δ: Departure from the Wiedemann-Franz law i

Cited by 43 publications

References 57 publications

Wiedemann-Franz law in the underdoped cuprate superconductorYBa2Cu3Oy

Wiedemann-Franz law in the underdoped cuprate superconductorYBa2Cu3Oy

Normal state pair nematicity and hidden magnetic order and metal-insulator (fermionboson) crossover origin of pseudogap phase of cuprates II

Effect of the Pseudogap on the Quasiparticle Transport from the Static Limit to Finite Energy for Cuprate Superconductors

Contact Info

Product

Resources

About