TY - JOUR
T1 - Anomalous phonon lifetime shortening in paramagnetic CrN caused by spin-lattice coupling
T2 - A combined spin and ab initio molecular dynamics study
AU - Stockem, Irina
AU - Bergman, Anders
AU - Glensk, Albert
AU - Hickel, Tilmann
AU - Körmann, Fritz
AU - Grabowski, Blazej
AU - Neugebauer, Jörg
AU - Alling, Björn
PY - 2018
Y1 - 2018
N2 - We study the mutual coupling of spin fluctuations and lattice vibrations in paramagnetic CrN by combining atomistic spin dynamics and ab initio molecular dynamics. The two degrees of freedom are dynamically coupled, leading to nonadiabatic effects. Those effects suppress the phonon lifetimes at low temperature compared to an adiabatic approach. The dynamic coupling identified here provides an explanation for the experimentally observed unexpected temperature dependence of the thermal conductivity of magnetic semiconductors above the magnetic ordering temperature.
AB - We study the mutual coupling of spin fluctuations and lattice vibrations in paramagnetic CrN by combining atomistic spin dynamics and ab initio molecular dynamics. The two degrees of freedom are dynamically coupled, leading to nonadiabatic effects. Those effects suppress the phonon lifetimes at low temperature compared to an adiabatic approach. The dynamic coupling identified here provides an explanation for the experimentally observed unexpected temperature dependence of the thermal conductivity of magnetic semiconductors above the magnetic ordering temperature.
UR - http://resolver.tudelft.nl/uuid:e293d3ca-b1f4-4901-af11-d7f372bdfff7
UR - http://www.scopus.com/inward/record.url?scp=85053831447&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.121.125902
DO - 10.1103/PhysRevLett.121.125902
M3 - Article
AN - SCOPUS:85053831447
SN - 0031-9007
VL - 121
JO - Physical Review Letters
JF - Physical Review Letters
IS - 12
M1 - 125902
ER -