منابع مشابه
Effects of spin structures on Fermi surface topologies in BaFe2As2
The effects of spin structures on the Fermi surface topologies of BaFe2As2 were calculated using the firstprinciples approach. Here,we considered the nonmagnetic, Checkerboard, Stripe, and SDW (spin-densitywave) structures as well as a tetragonal structure labeled as STR17. By comparing the calculated results with the published angle-resolved photoemission spectroscopy from the literature, we p...
متن کاملSpin excitation anisotropy in the paramagnetic tetragonal phase of BaFe2As2
Yu Li,1 Weiyi Wang,1 Yu Song,1 Haoran Man,1 Xingye Lu,2 Frédéric Bourdarot,3 and Pengcheng Dai1,2,* 1Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA 2Center for Advanced Quantum Studies and Department of Physics, Beijing Normal University, Beijing 100875, China 3Univ. Grenoble Alpes. CEA, DRF, INAC, MEM/MDN, F-38000 Grenoble, France (Received 16 May 2017; publish...
متن کاملMagnonlike dispersion of spin resonance in Ni-doped BaFe2As2.
Inelastic neutron scattering measurements on Ba(Fe0.963Ni0.037)2As2 manifest a neutron spin resonance in the superconducting state with anisotropic dispersion within the Fe layer. Whereas the resonance is sharply peaked at the antiferromagnetic (AFM) wave vector Q(AFM) along the orthorhombic a axis, the resonance disperses upwards away from Q(AFM) along the b axis. In contrast to the downward d...
متن کاملSpin-Waves in itinerant ferromagnets
We introduce a novel approach for the investigation of spin-wave excitations in itinerant ferromagnets. Our theory is based on a variational treatment of general multi-band Hubbard models which describe elements and compounds of transition metals. The magnon dispersion is derived approximately as the energy of a variational spin-wave state in the limit of large spatial dimensions. A numerical e...
متن کاملSpin waves in striped phases
In many antiferromagnetic, quasi-two-dimensional materials, doping with holes leads to “stripe” phases, in which the holes congregate along antiphase domain walls in the otherwise antiferromagnetic texture. Using a suitably parametrized two-dimensional Heisenberg model on a square lattice, we study the spin wave spectra of well-ordered spin stripes, comparing bond-centered antiphase domain wall...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2018
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.121.067002