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Physics Journal Club Meeting
Evolution of the local electronic states in Mn-doped Sr3Ru2O7
Justin Leshen
Department of Physics, Binghamton University
Materials whose physics is governed by strongly correlated electrons have become one of the
most intensely studied fields in condensed matter physics. The subtle interplay between various degrees
of freedom in these materials gives rise to many exotic states of matter such as high temperature
superconductivity, metal-insulator transitions, and quantum hall effect as a few examples. The double
layer Sr3Ru2O7 is a particularly interesting candidate for such studies where a few percent of Mn-doping,
replacing the Ru atoms, drives the system towards an antiferromagnetic (AFM) Mott insulator. Using
Scanning Tunneling Microscopy and Spectroscopy (STM/STS) we can probe the electronic structure of
this sample and measure the effects of the Mn impurities on the evolution of the electronic structure.
Join me and enjoy your pizza as I discuss our recent results found on the 1% and 5% Mn doped
samples. The naive expectation of local insulating islands around the Mn impurities are not observed,
instead several unexpected and exciting ordering phenomena emerge upon doping, including potential
nematic and charge density wave (CDW) orders visible only in the 5% sample. The potential for these
exotic states seems to come from instabilities present in the parent material with the Mn dopant acting as
a trigger. Comparisons to relevant ARPES and Neutron scattering results will be made and discussed.
Figure 1 Potential CDW in 5% doped sample at T=13K
Friday, May 6th, 2016
SL Bldg. Room 210
Pizza @ Noon
Presentation @ 12:15
There will be a sign-in sheet for all attendees to sign.