Thermal transport of the frustrated spin-chain mineral linarite: Magnetic heat transport and strong spin-phonon scattering
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F21%3A10437829" target="_blank" >RIV/00216208:11320/21:10437829 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=L8b8XnJrJP" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=L8b8XnJrJP</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.104.235129" target="_blank" >10.1103/PhysRevB.104.235129</a>
Alternative languages
Result language
angličtina
Original language name
Thermal transport of the frustrated spin-chain mineral linarite: Magnetic heat transport and strong spin-phonon scattering
Original language description
The mineral linarite [PbCuSO4(OH)2] forms a monoclinic structure where a sequence of Cu(OH)2 units forms a spin-12 chain. Competing ferromagnetic nearest-neighbor (J1) and antiferromagnetic next-nearest-neighbor interactions (J2) in this quasi-one-dimensional spin structure imply magnetic frustration and lead to magnetic ordering below TN=2.8K in a multiferroic elliptical spin-spiral ground state. Upon the application of a magnetic field along the spin-chain direction, distinct magnetically ordered phases can be induced. We studied the thermal conductivity κ in this material across the magnetic phase diagram as well as in the paramagnetic regime in the temperature ranges 0.07-1 K and 9-300 K. We found that in linarite the heat is carried mainly by phonons but shows a peculiar nonmonotonic behavior in field. In particular, κ is highly suppressed at the magnetic phase boundaries, indicative of strong scattering of the phonons off critical magnetic fluctuations. Even at temperatures far above the magnetically ordered phases, the phononic thermal conductivity is reduced due to scattering off magnetic fluctuations. The mean free path due to spin-phonon scattering (lspin-phonon) was determined as a function of temperature. A power law behavior was observed mainly above 500mK indicating the thermal activation of spin fluctuations. In the critical regime close to the saturation field, lspin-phonon shows a 1/T dependence. Furthermore, a magnon thermal transport channel was verified in the helical magnetic phase. We estimate a magnon mean free path which corresponds to about 1000 lattice spacings. (C)2021 American Physical Society
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review B
ISSN
2469-9950
e-ISSN
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Volume of the periodical
104
Issue of the periodical within the volume
23
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
235129
UT code for WoS article
000753729500005
EID of the result in the Scopus database
2-s2.0-85122064034