# name
Response of simple-metal systems with plane symmetry to local one-body operators

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Universitat de Barcelona. Departament d'Estructura i Constituents de la Matèri

# metadata.dc.description.abstract[].value
[eng] The objective of this work is to perform an alternative study of plasmon modes in
systems with plane symmetry. There are still some aspects of this problem to which no
conclusive answers have been given. The sum rule approach has some advantages over
more sophisticated methods. This allows to address us some questions that are not easily
answered using other methods. Limit cases, such as low momentum or step density profile,
can be worked out often because results are analytical in many cases. Also, the observability
of the modes can be discussed since the different contributions to the total energy can be
analyzed on their own. Moreover, we will see that the numerical results obtained show
an agreement with experimental data comparable to that of more involved methods, like
TDLDA. This is due to the fact that realistic models for the density profile, the kinetic
energy functional or the exchange and correlation functional can be employed. Therefore,
the main motivation of this work is to exploit all these advantages to accomplish our goal.
The contents are organized in the following way. In Chapter 2 we expose the sum rule
formalism in a general way and some previous findings are commented in Chapter 3. This
formalism is applied to study plasmon modes of simple-metal surfaces in Chapters 4 and 5.
The Local RPA formalism is discussed and its application to simple-metal slabs is presented
in Chapter 6. Finally, the main conclusions are summarized in Chapter 7. The relationship
between atomic units and other systems is discussed in Appendix A and the expressions of
the sum rules of the operators employed are given in Appendix B and C.

# metadata.dc.rights[].value
cc by (c) Sellarés González, Jordi, 1997

# metadata.dc.source[].value
Tesis Doctorals - Departament - Estructura i Constituents de la Matèria

# metadata.dc.title[].value
Response of simple-metal systems with plane symmetry to local one-body operators