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Poštovani kolege,<br>
<b>danas</b> će se izvanredno na <b>Fizičkom odsjeku u prostoriji
F-102 u 14:00</b> sati održati združeni znanstveni <u>seminar
Hrvatskog fizikalnog društva i Fizičkog odsjeka.</u><u><br>
</u><u> </u><br>
Gost predavač je <b>Clifford Hicks </b>sa Max-Planck-Institut fur
Chemische Physik fester Stoffe, Dresden (Njemačka), a <b>p</b><b>redavanje
se odnosi na napredak u postizanju uniaksijalnog tlaka i rezultati
korištenja tehnike u jako koreliranim sustavima</b>. Sažetak
slijedi:<br>
<br>
"Strain-tuning of the Correlated Electron Materials Sr2RuO4 and
Sr3Ru2O7<br>
<br>
In this seminar I present results of uniaxial pressure experiments
using a new piezoelectric-based apparatus, that can both compress
and tension test samples, and that can apply much higher pressures,
with greater homogeneity, than previous anvil-based techniques. I
present results on Sr2RuO4, a superconductor with a Fermi surface
that passes very close to a van Hove singularity. Through
compression of the lattice by ~1%, we are able to tune through this
van Hove singularity. Doing so strengthens the superconductivity
dramatically. I also present results on Sr3Ru2O7, a material with a
novel quantum critical phase that has long been thought, through the
effects of electronic correlations alone, to have lower symmetry
than the lattice. We find that this phase responds strongly to
strain-tuning, but the evidence is that it has the C4 symmetry of
the lattice, albeit with a high susceptibility to anisotropic
fields.<br>
<br>
This study is very relevant to analysis of other compounds,
including cuprate and iron pnictide superconductors, where C4 to C2
symmetry reduction plays a strong role."<br>
<br>
Nadam se da ćete se odazvati u velikom broju,<br>
Mihael
Grbić<br>
<br>
<br>
<br>
<div class="moz-signature">-- <br>
<p style="font-family:verdana">asst. prof. Mihael S. GRBIC<br>
email: <a class="moz-txt-link-abbreviated"
href="mailto:mgrbic@phy.hr">mgrbic@phy.hr</a><br>
web: <a class="moz-txt-link-abbreviated"
href="http://www.phy.hr/%7Emgrbic">www.phy.hr/~mgrbic</a><br>
<br>
contact:<br>
office: + 385 1 460 5543<br>
laboratory: +385 1 460 5503<br>
fax: +385 1 468 0336<br>
<br>
University of Zagreb<br>
Faculty of Science<br>
Department of Physics<br>
Bijenicka cesta 32<br>
10000 Zagreb<br>
Croatia</p>
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