Nodes versus Minima in the Energy Gap of Iron Pnictide Superconductors from Field-Induced Anisotropy
A. B. Vorontsov, I. Vekhter
DOI 10.1103/PhysRevLett.105.187004 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We develop the formalism for computing the oscillations of the specific heat and thermal transport under rotated magnetic field in multiband superconductors with anisotropic gap and apply it to iron-based materials. We show that these oscillations change sign at low temperatures and fields, which strongly influences the experimental conclusions about the gap structure. We find that recent measurements of the specific heat oscillations indicate that the iron-based superconductors possess an anisotropic gap with deep minima or nodes close to the line connecting electron and hole pockets. We predict the behavior of the thermal conductivity that will help distinguish between these cases.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba(FeAs)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| LaFePO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| BaFe2(As1-xPx)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Fe(Se,Te) Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Isostructural Spin-Density-Wave and Superconducting Gap Anisotropies in Iron-Arsenide Superconductors
similarity 0.97T. T. Han et al.
Source status unknown — claims are unverified
Manipulation of Gap Nodes by Uniaxial Strain in Iron-Based Superconductors
similarity 0.97Jian Kang et al.
Source status unknown — claims are unverified
Topological relation between bulk gap nodes and surface bound states: Application to iron-based superconductors
similarity 0.96Fa Wang & Dung-Hai Lee
Source status unknown — claims are unverified
Momentum dependence and nodes of the superconducting gap in the iron pnictides
similarity 0.96A. V. Chubukov et al.
Source status unknown — claims are unverified
Spin dynamics in electron-doped iron pnictide superconductors
similarity 0.95Yi Gao et al.
Source status unknown — claims are unverified
Modulation of pairing symmetry with bond disorder in unconventional superconductors
similarity 0.95Yao-Tai Kang et al.
Source status unknown — claims are unverified