Nematic state stabilized by off-site Coulomb interaction in iron-based superconductors
نویسندگان
چکیده
منابع مشابه
Self-consistent vertex correction analysis for iron-based superconductors: mechanism of Coulomb interaction-driven orbital fluctuations.
We study the mechanism of orbital or spin fluctuations due to multiorbital Coulomb interaction in iron-based superconductors, going beyond the random-phase approximation. For this purpose, we develop a self-consistent vertex correction (VC) method, and find that multiple orbital fluctuations in addition to spin fluctuations are mutually emphasized by the "multimode interference effect" describe...
متن کاملMagnetic properties of the superconducting state of iron-based superconductors
We show that features of the dynamical spin susceptibility can unambiguously distinguish between different pairing symmetries of the superconducting state in iron-based superconductors. A magnetic resonance is a feature for the extended sx2y2-wave cos kx cos ky pairing symmetry. It is present in the pure superconducting SC state but weakens in the mixed SC and magnetically ordered state. We cal...
متن کاملQuasiparticle interference in iron-based superconductors
We systematically calculate quasiparticle interference QPI signatures for the whole phase diagram of iron-based superconductors. Impurities inherent in the sample together with ordered phases lead to distinct features in the QPI images that are believed to be measured in spectroscopic imaging-scanning tunneling microscopy. In the spin-density wave phase the rotational symmetry of the electronic...
متن کاملSpectral density in a nematic state of iron pnictides
Maria Daghofer,1,* Andrew Nicholson,2,3 and Adriana Moreo2,3 1IFW Dresden, P.O. Box 27 01 16, D-01171 Dresden, Germany 2Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996, USA 3Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 32831, USA (Received 15 February 2012; revised manuscript received 16 April 2012; p...
متن کاملNanoscale Investigation of New Iron-Based Superconductors
We have successfully synthesized high quality β-FeSe-type iron chalcogenide nanowires (NWs) from annealing thin films prepared by pulse laser deposition method. Three kinds of NWs with nominal composition (FeSe0.9, FeSe0.3Te0.7 and FeTe0.8S0.2) have been prepared and carefully characterized by transmission electron microscope (TEM). Most analyzed NWs reveal good tetragonal structure along the (...
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 B
سال: 2015
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.92.085109