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<DIV style="TEXT-ALIGN: center" data-mce-style="text-align: center;"><STRONG><B><SPAN lang=HR style="FONT-SIZE: 16pt; COLOR: black" data-mce-style="font-size: 16pt; color: black;"><IMG><IMG src="cid:fb559ca8379da07816ebeb024a88bd13dae62179@zimbra" data-mce-src="cid:fb559ca8379da07816ebeb024a88bd13dae62179@zimbra"></SPAN></B></STRONG></DIV>
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<P style="TEXT-ALIGN: center; MARGIN: 0px" align=center data-mce-style="text-align: center; margin: 0px;"><B><SPAN lang=EN-GB style="FONT-FAMILY: 'Century Gothic',sans-serif; COLOR: #5f5f5f" data-mce-style="font-family: 'Century Gothic',sans-serif; color: #5f5f5f;">Institut za fiziku, Bijenička cesta 46,</SPAN></B></P>
<P style="TEXT-ALIGN: center; MARGIN: 0px" align=center data-mce-style="text-align: center; margin: 0px;"><B><SPAN lang=EN-GB style="FONT-FAMILY: 'Century Gothic',sans-serif; COLOR: #5f5f5f" data-mce-style="font-family: 'Century Gothic',sans-serif; color: #5f5f5f;">predavaonica u zgradi Mladen Paić</SPAN></B></P><STRONG><B><SPAN lang=EN-GB style="FONT-SIZE: 14pt; FONT-FAMILY: 'Century Gothic',sans-serif; COLOR: #993300" data-mce-style="font-size: 14pt; font-family: 'Century Gothic',sans-serif; color: #993300;">ponedjeljak, 9. svibnja 2016., u 15:00 sati</SPAN></B><BR></STRONG></DIV>
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<DIV style="TEXT-ALIGN: center" data-mce-style="text-align: center;"><SPAN lang=EN-GB style="FONT-SIZE: 16pt; FONT-FAMILY: 'Times New Roman',serif; COLOR: #55913c" data-mce-style="font-size: 16pt; font-family: 'Times New Roman',serif; color: #55913c;"><SPAN lang=EN-GB style="FONT-SIZE: 16pt; FONT-FAMILY: 'Times New Roman',serif; COLOR: #55913c" data-mce-style="font-size: 16pt; font-family: 'Times New Roman',serif; color: #55913c;"><STRONG>Universal thermopower of bad metals<BR></STRONG></SPAN></SPAN></DIV>
<DIV style="TEXT-ALIGN: center" data-mce-style="text-align: center;"><B><SPAN lang=EN-GB style="FONT-SIZE: 14pt; FONT-FAMILY: 'Century Gothic',sans-serif" data-mce-style="font-size: 14pt; font-family: 'Century Gothic',sans-serif;">dr. Veljko Zlatić<BR></SPAN></B></DIV>
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<DIV style="TEXT-ALIGN: center" data-mce-style="text-align: center;"><B><B><SPAN lang=EN-GB style="FONT-SIZE: 11pt; FONT-FAMILY: 'Century Gothic',sans-serif" data-mce-style="font-size: 11pt; font-family: 'Century Gothic',sans-serif;">Institute of Physics, Zagreb<BR></SPAN></B></B></DIV>
<DIV style="TEXT-ALIGN: center" data-mce-style="text-align: center;"><SPAN style="FONT-SIZE: small; FONT-FAMILY: Arial" data-mce-style="font-size: small; font-family: Arial;"></SPAN><BR> </DIV>
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<P style="MARGIN: 0px" data-mce-style="margin: 0px;"><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: arial, helvetica, sans-serif" data-mce-style="font-family: arial, helvetica, sans-serif; font-size: 12pt;">The transport properties of strongly correlated materials, such as vanadates, cobaltates, cuprates, Kondo semiconductors and organic demiconductors show the non-Fermi-liquid behavior. One common feature of these vastly different materials is that the resistivity rises linearly with temperature above the Ioffe-Regel limit. Another common feature is that they are formed by doping away from a Mott-Hubbard insulating state. Starting from this observation, and the ubiquity of non-Fermi-liquid materials, we provide a simple explanation for the transport properties.</SPAN></P>
<P style="MARGIN: 0px" data-mce-style="margin: 0px;"><SPAN style="FONT-FAMILY: arial, helvetica, sans-serif" data-mce-style="font-family: arial, helvetica, sans-serif;">The linear resistivity is derived using the general properties of the transport relaxation time for a strongly correlated material. The phenomenological results are substantiated by calculating the transport coefficients of the Falicov-Kimball model which, like the Hubbard or periodic Anderson model, has a gap in the excitation spectrum but, unlike these other models, admits an exact solution at arbitrary doping and temperature.</SPAN><BR><SPAN style="FONT-FAMILY: arial, helvetica, sans-serif" data-mce-style="font-family: arial, helvetica, sans-serif;">We show that the resistivity ρ(T) and thermopower α(T) of doped Mott-Hubbard systems exhibit simple universal features. (i) Close to the insulating phase, ρ(T) has a sharp lowtemperature upturn and α(T) has a large peak centered at temperature T. (ii) At moderate doping, ρ(T) becomes a linear function, while the peak of α(T) decreases and shifts to lower temperatures; α(T) changes sign for T>>T<SPAN style="FONT-SIZE: x-small" data-mce-style="font-size: x-small;">α</SPAN>. (iii) At the highest doping, we find that ρ(T) ~ ρ<SPAN style="FONT-SIZE: x-small" data-mce-style="font-size: x-small;">0</SPAN>+AT², and that α(T) is a monotonic function, negative for electron doping and positive for hole doping. This universal behavior follows from the general properties of the transport relaxation time of a doped Mott-Hubbard systems. The high-temperature behavior of α(T) can also be explained by the Kelvin formula and the fact that the chemical potentials for doped Mott insulators display similar behavior at high T.</SPAN></P>
<P style="MARGIN: 0px" data-mce-style="margin: 0px;"><BR><SPAN style="FONT-FAMILY: arial, helvetica, sans-serif" data-mce-style="font-family: arial, helvetica, sans-serif;">[1] V. Zlatić, G. Boyd and J.K. Freericks, PRL <STRONG>109</STRONG>, 266601 (2012).</SPAN><BR><SPAN style="FONT-FAMILY: arial, helvetica, sans-serif" data-mce-style="font-family: arial, helvetica, sans-serif;">[2] V. Zlatić, G. Boyd and J.K. Freericks, Phys. Rev. B <STRONG>89</STRONG>, 55101 (2014).</SPAN><BR><SPAN style="FONT-FAMILY: arial, helvetica, sans-serif" data-mce-style="font-family: arial, helvetica, sans-serif;">[3] G. Boyd, V. Zlatić and J.K. Freericks, Phys. Rev. B <STRONG>91</STRONG>, 075118 (2015).</SPAN></P>
<P style="MARGIN: 0px" data-mce-style="margin: 0px;"><B style="FONT-SIZE: 12pt" data-mce-style="font-size: 12pt;"><SPAN lang=EN-GB style="FONT-SIZE: 12pt; FONT-FAMILY: 'Century Gothic',sans-serif" data-mce-style="font-size: 12pt; font-family: 'Century Gothic',sans-serif;"><B><SPAN lang=EN-GB style="FONT-SIZE: 11pt" data-mce-style="font-size: 11pt;"> </SPAN></B></SPAN></B><SPAN style="FONT-FAMILY: arial, helvetica, sans-serif" data-mce-style="font-family: arial, helvetica, sans-serif;"></SPAN></P></DIV>
<DIV style="TEXT-ALIGN: left" data-mce-style="text-align: left;"><B><SPAN lang=EN-GB style="FONT-SIZE: 12pt; FONT-FAMILY: 'Century Gothic',sans-serif" data-mce-style="font-size: 12pt; font-family: 'Century Gothic',sans-serif;"><B><SPAN lang=EN-GB style="FONT-SIZE: 11pt; FONT-FAMILY: 'Century Gothic',sans-serif" data-mce-style="font-size: 11pt; font-family: 'Century Gothic',sans-serif;"> </SPAN></B></SPAN></B></DIV>
<DIV style="TEXT-ALIGN: right" data-mce-style="text-align: right;"><B><SPAN lang=EN-GB style="FONT-SIZE: 12pt; FONT-FAMILY: 'Century Gothic',sans-serif" data-mce-style="font-size: 12pt; font-family: 'Century Gothic',sans-serif;"><B><SPAN lang=EN-GB style="FONT-SIZE: 11pt; FONT-FAMILY: 'Century Gothic',sans-serif" data-mce-style="font-size: 11pt; font-family: 'Century Gothic',sans-serif;">Voditelji seminara IF-a: <A href="mailto:natasav@ifs.hr" target=_blank data-mce-href="mailto:natasav@ifs.hr">Nataša Vujičić</A> i <A href="mailto:damirs@ifs.hr" target=_blank data-mce-href="mailto:damirs@ifs.hr">Damir Starešinić</A></SPAN></B></SPAN></B></DIV></DIV></DIV></DIV></DIV>
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