Tailoring the Crystal Structure Toward Optimal Super Conductors

Abstract

We have studied the properties of layered transition metal compounds in search of unconventional superconductors. The aim is to identify ground states competing with superconductivity, and to use tuning parameters such as doping or pressure, to reveal the effects of this competition. The key results from the project are: -the discovery of remarkable transport properties in the doped layered dichalcogenide TiSe2, where Pt doping or Se deficiency result in a 10 order of magnitude change in the low temperature resistivity.- the synthesis and characterization of single crystals of GeBi2Te4, where the proper structural characterization revealed the non-trivial topological metal properties of this compound- the discovery of remarkably high ordering temperature (up to 300 K) in R5Pb3 compounds (R = heavy rare earth)- the discovery of enhanced itinerant magnetism in Co2As1-xPx, with the magnetic properties tuned by structural phase transitions.

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Document Details

Document Type
Technical Report
Publication Date
Jun 23, 2016
Accession Number
AD1011275

Entities

People

  • Emilia Morosan

Organizations

  • Rice University

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Band Structures
  • Crystal Structure
  • Crystals
  • Deficiencies
  • Electronic Mail
  • Fermi Levels
  • Low Temperature
  • Magnetic Properties
  • Metals
  • Phase Transformations
  • Single Crystals
  • Spin-Orbit Interaction
  • Superconductors
  • Transition Metals
  • Transitions
  • Transport Properties
  • Transport Ships

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.
  • Superconducting Magnet Technology