Extraordinary Spin-Wave Thermal Conductivity in Low-Dimensional Copper Oxides

Abstract

We applied frequency-dependent measurements of thermal transport properties using time-domain thermoreflectance (TDTR) to advance understanding of thermal transport in low dimensional copper-oxides that display extraordinary thermal transport by thermal excitations of spin degrees of freedom. We measured for the first time the magnon-phonon coupling parameter of a spin-ladder compound over a wide temperature range. We developed advances in the analysis of TDTR that enable measurements of materials such as low dimensional copper oxides with more than one significant type of heat carrier; and measurements of the anisotropic thermal conductivity of materials that lack in-plane symmetry.

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Document Details

Document Type
Technical Report
Publication Date
Jan 23, 2015
Accession Number
ADA622603

Entities

People

  • David Cahill

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Agreements
  • Conductivity
  • Copper
  • Copper Oxides
  • Couplings
  • Department Of Defense
  • Engineering
  • Equations
  • Magnons
  • Materials
  • Mathematics
  • Measurement
  • Spin Waves
  • Students
  • Thermal Conductivity
  • Time Domain

Fields of Study

  • Physics

Readers

  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.
  • Thermal Physics or Thermal Science.