期刊
PHYSICAL REVIEW LETTERS
卷 121, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.121.125902
关键词
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资金
- FP7 Marie Sklodowska-Curie COFUND Programme [600382]
- priority programme SPP1599 Ferroic cooling [HI1300/6-2]
- Netherlands Organisation for Scientific Research (NWO) under the VIDI research programme [15707]
- European Research Council (ERC) under the EU's Horizon 2020 Research and Innovation Programme [639211]
- Swedish Research Council (VR) [330-2014-6336]
- Marie Sklodowska Curie Actions [INCA 600398]
- Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University (Faculty Grant SFOMatLiU) [2009 00971]
- Swedish Foundation for Strategic Research
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.
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