Magnon-phonon coupling in the spin-ladder compound Ca 9La5Cu24O41 measured by time-domain thermoreflectance

Gregory T. Hohensee, R. B. Wilson, Joseph P. Feser, David G Cahill

Research output: Contribution to journalArticle

Abstract

Below room temperature, the apparent thermal conductivity of the two-leg spin ladder, Ca9La5Cu24O41, as measured by time-domain thermoreflectance (TDTR), depends on the frequency of the applied surface heating. This occurs because the thermal penetration depth in the TDTR experiment is comparable to the length scale for the equilibration of the magnons that are the dominant channel for heat conduction and the phonons that dominate the heat capacity. We apply a two-temperature model to analyze the TDTR data and extract an effective volumetric magnon-phonon coupling parameter g for Ca9La5Cu24O41 at temperatures from 75 K to 300 K; g varies by approximately two orders of magnitude over this range of temperature and has the value g=1015Wm-3K-1 near the peak of the thermal conductivity at T≈180 K.

Original languageEnglish (US)
Article number024422
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume89
Issue number2
DOIs
StatePublished - Jan 30 2014

Fingerprint

Ladders
ladders
thermal conductivity
Thermal conductivity
conductive heat transfer
Temperature
magnons
temperature
phonons
penetration
Phonons
Heat conduction
specific heat
Specific heat
heating
room temperature
Heating
Experiments

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Magnon-phonon coupling in the spin-ladder compound Ca 9La5Cu24O41 measured by time-domain thermoreflectance. / Hohensee, Gregory T.; Wilson, R. B.; Feser, Joseph P.; Cahill, David G.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 89, No. 2, 024422, 30.01.2014.

Research output: Contribution to journalArticle

@article{9e5fa672a18d4fcbb515e65f3155253f,
title = "Magnon-phonon coupling in the spin-ladder compound Ca 9La5Cu24O41 measured by time-domain thermoreflectance",
abstract = "Below room temperature, the apparent thermal conductivity of the two-leg spin ladder, Ca9La5Cu24O41, as measured by time-domain thermoreflectance (TDTR), depends on the frequency of the applied surface heating. This occurs because the thermal penetration depth in the TDTR experiment is comparable to the length scale for the equilibration of the magnons that are the dominant channel for heat conduction and the phonons that dominate the heat capacity. We apply a two-temperature model to analyze the TDTR data and extract an effective volumetric magnon-phonon coupling parameter g for Ca9La5Cu24O41 at temperatures from 75 K to 300 K; g varies by approximately two orders of magnitude over this range of temperature and has the value g=1015Wm-3K-1 near the peak of the thermal conductivity at T≈180 K.",
author = "Hohensee, {Gregory T.} and Wilson, {R. B.} and Feser, {Joseph P.} and Cahill, {David G}",
year = "2014",
month = "1",
day = "30",
doi = "10.1103/PhysRevB.89.024422",
language = "English (US)",
volume = "89",
journal = "Physical Review B-Condensed Matter",
issn = "0163-1829",
publisher = "American Institute of Physics Publising LLC",
number = "2",

}

TY - JOUR

T1 - Magnon-phonon coupling in the spin-ladder compound Ca 9La5Cu24O41 measured by time-domain thermoreflectance

AU - Hohensee, Gregory T.

AU - Wilson, R. B.

AU - Feser, Joseph P.

AU - Cahill, David G

PY - 2014/1/30

Y1 - 2014/1/30

N2 - Below room temperature, the apparent thermal conductivity of the two-leg spin ladder, Ca9La5Cu24O41, as measured by time-domain thermoreflectance (TDTR), depends on the frequency of the applied surface heating. This occurs because the thermal penetration depth in the TDTR experiment is comparable to the length scale for the equilibration of the magnons that are the dominant channel for heat conduction and the phonons that dominate the heat capacity. We apply a two-temperature model to analyze the TDTR data and extract an effective volumetric magnon-phonon coupling parameter g for Ca9La5Cu24O41 at temperatures from 75 K to 300 K; g varies by approximately two orders of magnitude over this range of temperature and has the value g=1015Wm-3K-1 near the peak of the thermal conductivity at T≈180 K.

AB - Below room temperature, the apparent thermal conductivity of the two-leg spin ladder, Ca9La5Cu24O41, as measured by time-domain thermoreflectance (TDTR), depends on the frequency of the applied surface heating. This occurs because the thermal penetration depth in the TDTR experiment is comparable to the length scale for the equilibration of the magnons that are the dominant channel for heat conduction and the phonons that dominate the heat capacity. We apply a two-temperature model to analyze the TDTR data and extract an effective volumetric magnon-phonon coupling parameter g for Ca9La5Cu24O41 at temperatures from 75 K to 300 K; g varies by approximately two orders of magnitude over this range of temperature and has the value g=1015Wm-3K-1 near the peak of the thermal conductivity at T≈180 K.

UR - http://www.scopus.com/inward/record.url?scp=84894746714&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84894746714&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.89.024422

DO - 10.1103/PhysRevB.89.024422

M3 - Article

AN - SCOPUS:84894746714

VL - 89

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 0163-1829

IS - 2

M1 - 024422

ER -