Journal ArticleDOI
Influence of Electron-Phonon Interactions on the de Haas-van Alphen Effect
Stanley Engelsberg,G. Simpson +1 more
TLDR
In this article, the de Haas-van Alphen amplitude of the oscillations of the magnetization as a function of temperature in mercury was calculated for a system of electrons interacting with phonons in the presence of a magnetic field.Abstract:
The thermodynamic potential and magnetization are calculated for a system of electrons interacting with phonons in the presence of a magnetic field. The results are used for a numerical evaluation of the de Haas-van Alphen amplitude of the oscillations of the magnetization as a function of temperature in mercury. The calculated results show that although we are dealing with a strong-coupling system, the experimental observations of the de Haas-van Alphen effect should be very similar to that expected for free particles. We also apply the techniques used in the derivation to the case of nearly ferromagnetic electron systems and calculate the enhancement of the argument of the spin-splitting factor. The analysis for nearly ferromagnetic systems leads to the prediction that the cyclotron frequency which enters the amplitude of the oscillations is reduced by the same mass-enhancement factor as that which enters the specific heat.read more
Citations
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Journal ArticleDOI
Unconventional Fermi surface in an insulating state
B. S. Tan,Yu-Te Hsu,Bin Zeng,M. Ciomaga Hatnean,Neil Harrison,Zengwei Zhu,Mate Hartstein,M. Kiourlappou,Anchal Srivastava,Michelle Johannes,Tim Murphy,J.-H. Park,Luis Balicas,Gil Lonzarich,Geetha Balakrishnan,Suchitra E. Sebastian +15 more
TL;DR: In this article, quantum oscillation measurements of magnetic torque in high-purity single crystals of the Kondo insulator SmB6 are presented, which reveal quantum oscillations frequencies characteristic of a large three-dimensional conduction electron Fermi surface similar to the metallic rare earth hexaborides such as PrB6 and LaB6.
Journal ArticleDOI
Quasiparticle mass enhancement approaching optimal doping in a high-Tc superconductor
Brad Ramshaw,Suchitra E. Sebastian,Ross D. McDonald,James Day,B. S. Tan,Zengwei Zhu,Jonathan B. Betts,Ruixing Liang,D. A. Bonn,D. A. Bonn,W. N. Hardy,W. N. Hardy,Neil Harrison +12 more
TL;DR: Using magnetic fields exceeding 90 tesla to access the underlying metallic state of the cuprate YBa2Cu3O6+δ over a wide range of doping, magnetic quantum oscillations reveal a strong enhancement of the quasiparticle effective mass toward optimal doping.
Journal ArticleDOI
The Electron-Phonon Interaction in Normal Metals
TL;DR: The influence of the electron-phonon many-body renormalization effects on the electron states in normal metals is reviewed in this article, where the electron mass enhancement parameter λ is discussed.
Quasiparticle mass enhancement approaching optimal doping in a
Brad Ramshaw,Suchitra E. Sebastian,Ross D. McDonald,James Day,B. S. Tan,Zengwei Zhu,Ruixing Liang,D. A. Bonn,Walter Hardy,Nicholas M. Harrison +9 more
Journal ArticleDOI
Metal-insulator quantum critical point beneath the high Tc superconducting dome
Suchitra E. Sebastian,Neil Harrison,M. M. Altarawneh,Charles H. Mielke,Ruixing Liang,D. A. Bonn,Walter Hardy,Gilbert G. Lonzarich +7 more
TL;DR: This work uses ultrastrong magnetic fields to measure quantum oscillations in underdoped YBa2Cu3O6+x, revealing a dramatic doping-dependent upturn in quasiparticle effective mass at a critical metal-insulator transition beneath the superconducting dome.
References
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Journal ArticleDOI
Transition temperature of strong-coupled superconductors.
TL;DR: In this paper, the superconducting transition temperature is calculated as a function of the electron-phonon and electron-electron coupling constants within the framework of strong coupling theory.
Journal ArticleDOI
Effect of Ferromagnetic Spin Correlations on Superconductivity
N. F. Berk,J. R. Schrieffer +1 more
Journal ArticleDOI
Low-Temperature Properties of Nearly Ferromagnetic Fermi Liquids
Sebastian Doniach,S. Engelsberg +1 more
TL;DR: In this article, effective mass corrections due to emission and reabsorption of persistent spin fluctuations are shown to have a temperature dependence which fits qualitatively that of the low-temperature specific heat of ${\mathrm{He}}^{3}$.
Journal ArticleDOI
Coupled Electron-Phonon System
TL;DR: In this article, a coupled electron-phonon system is considered for phonon spectra of Einstein and Debye forms, and the single-particle electron Green's function $G$ is calculated in a nonperturbative manner in both models, and its spectral weight function is examined to determine the validity of a quasiparticle picture.
Journal ArticleDOI
Transport theory for electron-phonon interactions in metals
TL;DR: In this article, a coupled set of equations for the electron and phonon distribution functions was derived for the nonequilibrium case, which is correct even in the situation in which the electronic excitation spectrum has considerable width and structure so that one might not expect a priori that there would be well defined quasiparticles.