Measuring surface phonons using molecular spin-echo.
Measuring surface phonons using molecular spin-echo.
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DOI:
10.1039/d2cp01372j
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发表时间:
2022-06-15
影响因子:
3.3
通讯作者:
Alexandrowicz, Gil
中科院分区:
文献类型:
--
作者:
Chadwick, Helen;Alexandrowicz, Gil
A new method to measure surface phonons with a molecular beam is presented. The method extends the principles of 3He spin-echo spectroscopy, to the more complex case of a molecular beam exchanging energy with the surface. Measurements are presented for inelastic scattering of D2 from a Cu(111) surface. Similarly to helium spin-echo, experiments can be performed along optimal tilted projections making it possible to resolve energy peaks with a high energy resolution which is not restricted by the spread of energies of the incident beam. Two analysis methods for these molecular spin echo experiments are presented. A classical approach, analogous to that used for helium spin-echo, explains the most dominant excitation peaks measured, whereas a semi-classical approach allows us to identify smaller peaks which are related to the complexity of the multiple spin-rotation states which exist for molecules. A new method to measure surface phonons with a molecular beam is presented.
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影响因子:
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Alkoby, Yosef;Chadwick, Helen;Alexandrowicz, Gil
通讯作者:
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