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Effects of Rotational-Symmetry Breaking on Physisorption of Ortho- and Para-H2 on Ag(111).
- Source :
-
Physical Review Letters . 4/11/2014, Vol. 112 Issue 14, p146101-1-146101-5. 5p. - Publication Year :
- 2014
-
Abstract
- Quantum-state-selective thermal desorption of H2 weakly 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-H2 is about three times as large as that of the para-H2. The entropy difference indicates a perpendicular orientation preference of anisotropic physisorption potential, which also suggests the importance of partial hybridization interaction for weak physisorption. [ABSTRACT FROM AUTHOR]
- Subjects :
- *PHYSISORPTION
*THERMAL desorption
*NUCLEAR spin
*SYMMETRY breaking
*NUCLEAR physics
Subjects
Details
- Language :
- English
- ISSN :
- 00319007
- Volume :
- 112
- Issue :
- 14
- Database :
- Academic Search Index
- Journal :
- Physical Review Letters
- Publication Type :
- Academic Journal
- Accession number :
- 95862845
- Full Text :
- https://doi.org/10.1103/PhysRevLett.112.146101