Display options
Cite
Li Y, Yin Z, Wang X, et al. Orbital Selective Spin Excitations and their Impact on Superconductivity of LiFe_{1-x}Co_{x}As. Phys Rev Lett. 2016;116(24):247001doi: 10.1103/PhysRevLett.116.247001.
Li, Y., Yin, Z., Wang, X., Tam, D. W., Abernathy, D. L., Podlesnyak, A., Zhang, C., Wang, M., Xing, L., Jin, C., Haule, K., Kotliar, G., Maier, T. A., & Dai, P. (2016). Orbital Selective Spin Excitations and their Impact on Superconductivity of LiFe_{1-x}Co_{x}As. Physical review letters, 116(24), 247001. https://doi.org/10.1103/PhysRevLett.116.247001
Li, Yu, et al. "Orbital Selective Spin Excitations and their Impact on Superconductivity of LiFe_{1-x}Co_{x}As." Physical review letters vol. 116,24 (2016): 247001. doi: https://doi.org/10.1103/PhysRevLett.116.247001
Li Y, Yin Z, Wang X, Tam DW, Abernathy DL, Podlesnyak A, Zhang C, Wang M, Xing L, Jin C, Haule K, Kotliar G, Maier TA, Dai P. Orbital Selective Spin Excitations and their Impact on Superconductivity of LiFe_{1-x}Co_{x}As. Phys Rev Lett. 2016 Jun 17;116(24):247001. doi: 10.1103/PhysRevLett.116.247001. Epub 2016 Jun 17. PMID: 27367401.
Copy Download .nbib Format: NLM
Share it on

Phys Rev Lett. 2016 Jun 17;116(24):247001. doi: 10.1103/PhysRevLett.116.247001. Epub 2016 Jun 17.

Orbital Selective Spin Excitations and their Impact on Superconductivity of LiFe_{1-x}Co_{x}As.

Physical review letters

Yu Li, Zhiping Yin, Xiancheng Wang, David W Tam, D L Abernathy, A Podlesnyak, Chenglin Zhang, Meng Wang, Lingyi Xing, Changqing Jin, Kristjan Haule, Gabriel Kotliar, Thomas A Maier, Pengcheng Dai

Affiliations

  1. Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA.
  2. Center for Advanced Quantum Studies and Department of Physics, Beijing Normal University, Beijing 100875, China.
  3. Department of Physics, Rutgers University, Piscataway, New Jersey 08854, USA.
  4. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
  5. Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
  6. Department of Physics, University of California, Berkeley, California 94720, USA.
  7. Collaborative Innovation Center of Quantum Matter, Beijing, China.
  8. Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
  9. Center for Nanophase Materials Sciences and Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.

PMID: 27367401 DOI: 10.1103/PhysRevLett.116.247001

Abstract

We use neutron scattering to study spin excitations in single crystals of LiFe_{0.88}Co_{0.12}As, which is located near the boundary of the superconducting phase of LiFe_{1-x}Co_{x}As and exhibits non-Fermi-liquid behavior indicative of a quantum critical point. By comparing spin excitations of LiFe_{0.88}Co_{0.12}As with a combined density functional theory and dynamical mean field theory calculation, we conclude that wave-vector correlated low energy spin excitations are mostly from the d_{xy} orbitals, while high-energy spin excitations arise from the d_{yz} and d_{xz} orbitals. Unlike most iron pnictides, the strong orbital selective spin excitations in the LiFeAs family cannot be described by an anisotropic Heisenberg Hamiltonian. While the evolution of low-energy spin excitations of LiFe_{1-x}Co_{x}As is consistent with the electron-hole Fermi surface nesting conditions for the d_{xy} orbital, the reduced superconductivity in LiFe_{0.88}Co_{0.12}As suggests that Fermi surface nesting conditions for the d_{yz} and d_{xz} orbitals are also important for superconductivity in iron pnictides.

Publication Types