Pinpointing Gap Minima in Ba(Fe0:94Co0:06)2 via Band Structure Calculations and Electronic Raman Scattering

Abstract

A detailed knowledge of the gap structure for the Fe-pnictide superconductors is still rather rudimentary, with several conflicting reports of either nodes, deep gap minima, or fully isotropic gaps on the Fermi surface sheets, both in the kx-ky plane and along the c-axis. In this paper we present considerations for electronic Raman scattering which can help clarify the gap structure and topology using different light scattering geometries. Using density functional calculations for the Raman vertices, it is shown that the location of the gap minima may occur on loops stretching over a portion of the c-axis in Ba(Fe0.94-Co0.06)2.

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Document Details

Document Type
Technical Report
Publication Date
Aug 03, 2010
Accession Number
ADA526809

Entities

People

  • B. Muschler
  • I. I. Mazin
  • I. R. Fisher
  • J. G. Analytis
  • Jiun-Haw Chu
  • R. Hackl
  • T. P. Devereaux

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Band Structures
  • Brillouin Zones
  • Crystal Structure
  • Crystals
  • Electrons
  • Energy Bands
  • Fermi Surfaces
  • Geometry
  • Hot Spots
  • Light Scattering
  • Materials
  • Military Research
  • Quantum Properties
  • Raman Scattering
  • Scattering
  • Spin-Orbit Interaction
  • Symmetry

Fields of Study

  • Physics

Readers

  • Nanofabrication and Microfabrication.
  • Quantum Chemistry
  • Systems Analysis and Design

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene