Unusual superconducting isotope effect in the presence of a quantum criticality

  title={Unusual superconducting isotope effect in the presence of a quantum criticality},
  author={Yaron Kedem and Jian-Xin Zhu and Alexander V. Balatsky},
  journal={Physical Review B},
The isotope effect in superconductivity (SC) is used to make a concrete connection to a quantum critical point (QCP) that is tunable by isotopic mass substitution. We find a distinct contribution t ... 

Figures from this paper

Isotope effect in superconducting n-doped SrTiO3
The unusually large size of the observed isotope effect supports a recent model for superconductivity in these materials based on strong coupling to the ferroelectric soft modes of SrTiO3.
Superconductivity at low density near a ferroelectric quantum critical point: Doped SrTiO3
Recent experiments on electron- or hole-doped SrTiO$_{3}$ have revealed a hitherto unknown form of superconductivity, where the Fermi energy of the paired electrons is much lower than the energies of
Quantum ferroelectric instabilities in superconducting SrTiO3
We examine the effects of strain and cation substitution on the superconducting phase of polar semiconductors near a ferroelectric quantum phase transition with a model that combines a strong
Possible mechanism for superconductivity in doped SrTiO3
The soft ferro-electric phonon in SrTiO3 observed with optical spectroscopy has an extraordinary strong spectral weight which is much stronger than expected in the limit of a perfectly ionic
Novel pairing mechanism for superconductivity at a vanishing level of doping driven by critical ferroelectric modes
Superconductivity occurring at low densities of mobile electrons is still a mystery since the standard theories do not apply in this regime. We address this problem by using a microscopic model for
Prospects and applications near ferroelectric quantum phase transitions: a key issues review.
This key issues article aims to provide a self-contained overview of ferroelectrics near quantum phase transitions with open questions for future research that include textured polarization states and unusual forms of superconductivity that remain to be understood theoretically.
Doping and disorder dependent isotope exponent in hole doped cuprates
The nature of the variation of oxygen isotope exponent (IE) with the number of doped holes, p, in the CuO2 planes has been a source of considerable debate. The large IE over certain range of hole
Published Tunneling Results of Binnig et al Interpreted as Related to Surface Superconductivity in SrTiO3
In 1980, Binnig et al. reported tunneling measurements on Nb-doped SrTiO3, and interpreted their results as indicating two-band superconductivity in the bulk of SrTiO3. However, (1) effective masses
Charge transport in a polar metal
The fate of electric dipoles inside a Fermi sea is an old issue, yet poorly explored. Sr$${}_{1-x}$$1−xCa$${}_{x}$$xTiO$${}_{3}$$3 hosts a robust but dilute ferroelectricity in a narrow ($$0.0018\ <\
Domes of Tc in single-band and multiband superconductors with finite-range attractive interactions
The rise and fall of the superconducting transition temperature $T_c$ upon tuning carrier density or external parameters, such as pressure or magnetic field, is ubiquitously observed in a wide range


Quantum phase transitions
Nature abounds with phase transitions. The boiling and freezing of water are everyday examples of phase transitions, as are more exotic processes such as superconductivity and superfluidity. The
Quantum Ising Phases And Transitions In Transverse Ising Models
Thank you very much for reading quantum ising phases and transitions in transverse ising models. As you may know, people have search numerous times for their favorite readings like this quantum ising
I and i
There is, I think, something ethereal about i —the square root of minus one, which seems an odd beast at that time—an intruder hovering on the edge of reality.
  • Rev. Lett. 115, 247002
  • 2015
Nature Physics 10
  • 367
  • 2014
  • Rev. Lett. 82, 3540
  • 1999
  • Natl. Acad. Sci. U. S. A. 111, 11663
  • 2014
New Journal of Physics 14
  • 013046
  • 2012
  • Rev. Lett. 105, 186403
  • 2010
  • Natl. Acad. Sci. U. S. A. 107, 6175
  • 2010