Photoemission spectroscopies and their application in solid state and material physics
DIPC Seminars
- Speaker
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Dr. Federico Mazzola (Department of Physics, Norwegian University of Science and Technology (NTNU), Trondheim, Norway)
- When
-
2016/05/12
14:00 - Place
- Donostia International Physics Center (DIPC)
- Add to calendar
- iCal
**
Photoemission spectroscopies and their application in solid state and material
physics
**
Federico Mazzola
Understanding the electronic properties of solid state
systems is of fundamental importance to all matter. In
particular, understanding and tailoring the properties
of bound electrons in materials is an indispensable step
to broaden our fundamental knowledge in diverse areas,
whilst establishing new approaches to design materials
with tailored properties.
Photoemission spectroscopy is a powerful and versatile
tool, able to elucidate the electronic properties of solid
state systems and the behavior of bound electrons in a
solid. Photoemission gives fundamental insight into the
microscopic origin of several physics and chemistry phe-
nomena ranging from spin-orbit coupling, electric- and
size-driven quantum con nement, crystal eld splitting,
many-body interactions to surface-catalysis and surface-
reactions.
In this talk, I will present some photoemission results
for narrow, ultrahigh density doping pro les in semicon-
ductors, also called -layers [1, 2]. In particular, I will
show how it is possible to tune the quantum con nement
in these systems to gain an exquisite control over density
and lifetime of carriers. In addition, I will present results
for graphene [3]. Speci cally I will focus on the electronic
properties of its -band which, even though disperses at
energies away from the Fermi level, is a ected by an un-
usually strong electron phonon coupling. I will speculate
about the possibility of engineering such an e ect to pos-
sibly turn graphene into a superconductor.
[1] F. Mazzola, C. M. Polley, J. A. Miwa, M. Y. Simmons and
J. W. Wells. Appl. Phys. Lett. 104, 173108 (2014)
[2] F. Mazzola, M. T. Edmonds, K. Hydalsvik, D. J. Carter,
N. A. Marks, B. C. C. Cowie, L. Thomsen, J. Miwa, M.
Y. Simmons and J. W. Wells. ACS Nano 8, 10 pp 10223-
10228 (2014)
[3] F. Mazzola, J. W. Wells, R. Yakimova, S. Ulstrup, J. A.
Miwa, R. Balog, M. Bianchi, M. Leandersson, J. Adell, P.
Hofmann and T. Balasubramanian. Phys. Rev. Lett. 111,
216806 (2013)