Orbital selective neutron spin resonance in underdoped superconducting NaFe0.985Co0.015As
Weiyi Wang, J. T. Park, Rong Yu, Yu Li, Yu Song, Zongyuan Zhang, Alexandre Ivanov, Jiri Kulda, Pengcheng Dai
DOI 10.1103/PhysRevB.95.094519 · Physical Review B
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 use neutron scattering to study the electron-doped superconducting NaFe0.985Co0.015As (Tc=14 K), which has coexisting static antiferromagnetic (AF) order (TN=31 K) and exhibits two neutron spin resonances (Er1≈3.5 meV and Er2≈6 meV) at the in-plane AF ordering wave vector QAF=Q1=(1,0) in reciprocal space. In the twinned state below the tetragonal-to-orthorhombic structural transition Ts, both resonance modes appear at Q1 but cannot be distinguished from Q2=(0,1). By detwinning the single crystal with uniaxial pressure along the orthorhombic b axis, we find that both resonances appear only at Q1 with vanishing intensity at Q2. Since electronic bands of the orbital dxz and dyz characters split below Ts with the dxz band sinking ∼10 meV below the Fermi surface, our results indicate that the neutron spin resonances in NaFe0.985Co0.015As arise mostly from quasiparticle excitations between the hole and electron Fermi surfaces with the dyz orbital character.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NaFe0.985Co0.015As Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 14 | Pressure not reported | onset |
Similar papers
Neutron spin resonance as a probe of superconducting gap anisotropy in partially detwinned electron underdoped NaFe0.985Co0.015As
similarity 0.97Chenglin Zhang et al.
Source status unknown — claims are unverified
Anisotropic neutron spin resonance in underdoped superconducting NaFe1−xCoxAs
similarity 0.96Chenglin Zhang et al.
Source status unknown — claims are unverified
Orbital selective neutron spin resonance in underdoped superconducting NaFeCoAs
similarity 0.95Weiyi Wang et al. · 2017 · arXiv:1703.03318
Source status unknown — claims are unverified
Double neutron spin resonances and gap anisotropy in underdoped superconducting NaFe0.985Co0.015As
similarity 0.94Chenglin Zhang et al. · 2013 · arXiv:1310.4817
Source status unknown — claims are unverified
Distinguishing s± and s++ electron pairing symmetries by neutron spin resonance in superconducting NaFe0.935Co0.045As
similarity 0.94Chenglin Zhang et al.
Source status unknown — claims are unverified
Neutron spin resonance as a probe of superconducting gap anisotropy in partially detwinned electron underdoped NaFeCoAs
similarity 0.93Chenglin Zhang et al. · 2015 · arXiv:1503.06737
Source status unknown — claims are unverified