Effects of Rotational-Symmetry Breaking on Physisorption of Ortho- and Para-H2 on Ag(111)
Effects of Rotational-Symmetry Breaking on Physisorption of Ortho- and Para-H2 on Ag(111)
复制标题
旋转对称破缺对邻位和对位 H2 在 Ag(111) 上物理吸附的影响
DOI：
10.1103/physrevlett.112.146101
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
K. Fukutani
中科院分区：
文献类型：
--
作者：
T. Sugimoto;K. Fukutani
弱物理吸附在Ag（111）上的量子态选择性热脱附表明，核自旋修饰之间的脱附特征显著不同。由于各向异性相互作用引起的旋转对称破缺引起的能量移动不仅影响吸附的焓，而且影响吸附的熵。邻位的脱附的指前因子约为帕拉的指前因子的三倍。熵差表明各向异性物理吸附势的垂直取向偏好，这也表明部分杂化相互作用对弱物理吸附的重要性。
Quantum-state-selective thermal desorption ofweakly physisorbed on Ag(111) demonstrates significantly different desorption features between the nuclear-spin modifications. An energy shift due to the rotational-symmetry breaking induced by an anisotropic interaction affects not only the enthalpy but also the entropy of adsorption. The preexponential factor for desorption of the ortho-is about three times as large as that of the para-. The entropy difference indicates a perpendicular orientation preference of anisotropic physisorption potential, which also suggests the importance of partial hybridization interaction for weak physisorption.