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<b><span style="font-size:16.0pt; color:#1F497D">Department of Electrical and Computer Engineering</span></b><span style="font-size:16.0pt; color:#1F497D"></span></p>
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<b><span style="font-size:16.0pt; color:#1F497D">Materials Engineering Program</span></b></p>
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<b><span style="font-size:14.0pt; color:#1F497D">Texas Center for Superconductivity at Univ. of Houston<br>
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<b><span style="font-size:14.0pt; color:#1F497D">Center for Integrated Bio and Nano Systems</span></b></p>
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<b><span style="font-size:14.0pt; color:#1F497D"> 10:00 a.m., May 6</span></b><b><span style="font-size:14.0pt; color:#1F497D">, 2022</span></b></p>
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<b><span style="font-size:14.0pt; color:#1F497D">Join Zoom Meeting</span></b><span style="font-size:10.0pt; font-family:"Tahoma","sans-serif"; color:#1F497D"></span></p>
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<b><span style="font-size:14.0pt; color:#1F497D"><a href="https://urldefense.com/v3/__https://zoom.us/j/845619943?pwd=QlZvYUV6M2dxNDkvNWxBd3F2YzdJZz09__;!!LkSTlj0I!RY36v8rc0HmWFLiTTBHvwLA0IazEOlQxdQZC1QwuRSdYLO0ZgFA27Y6PryVryUiq6I-G0w$" data-auth="NotApplicable">https://zoom.us/j/845619943?pwd=QlZvYUV6M2dxNDkvNWxBd3F2YzdJZz09</a></span></b></p>
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<b><span style="font-size:14.0pt; color:#1F497D">Meeting ID: 845 619 943</span></b></p>
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<b><span style="font-size:14.0pt; color:#1F497D">Password: 016104 </span></b></p>
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<b><span style="font-size:20.0pt; color:#1F497D"></span></b><b><span style="font-size:20.0pt; color:#1F497D"></span></b><span class="x_x_x_x_x_x_x_x_x_A0" style="font-family:MiloOT-Bold; color:rgb(164,25,44); font-style:italic"><b><span style="font-size:20pt; font-family:"Times New Roman","serif"; font-style:normal; color:rgb(31,73,125); background-color:rgba(0,0,0,0)">
<h3 class="x_x_elementToProof"><span style="font-size:20pt; background-color:rgba(0,0,0,0); font-weight:bold">Probing a ferro-rotational order by optical second harmonic generation<br>
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<div class="x_x_elementToProof"><b><span style="font-size:18pt; color:rgb(23,78,134); font-family:"Times New Roman",Times,serif"><strong><span class="x_x_x_x_x_x_x_x_x_A4" style="font-family:MiloOT-Bold; color:rgb(34,30,31); font-weight:bold"><span style="font-size:18pt; font-family:"Times New Roman",Times,serif; color:rgb(23,78,134); background-color:rgba(0,0,0,0)"><b><span style="font-size:18pt; background-color:rgba(0,0,0,0)">
</span></b> <span style=""><span style="font-size:18pt; background-color:rgba(0,0,0,0); font-weight:bold">Wencan Jin
</span></span></span></span></strong></span><span style="font-size:18.0pt; color:#1F497D"></span></b><span style="font-size:16pt; font-family:"Times New Roman",Times,serif; color:rgb(23,78,134); background-color:rgba(0,0,0,0)">
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<div class="x_x_elementToProof"> <span style="color:rgb(23,78,134)"><span style="font-size:16pt; background-color:rgba(0,0,0,0)"><span style="font-size:16pt; line-height:107%; background-color:rgba(0,0,0,0)"> Department of Physics, Auburn
University <br>
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<div class="x_x_elementToProof"><b><span style="color:rgb(12,100,192); font-size:14pt">Abstract</span></b><span style="font-size:14pt; font-family:"Calibri","sans-serif"; color:rgb(12,100,192)">:</span><span style="font-size:12.0pt; font-family:"Times New Roman",serif">
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<div class="x_x_elementToProof" lang="EN-US"><span style="font-family:"Times New Roman",serif; color:rgb(12,100,192); background-color:rgba(0,0,0,0)"><b><span style="color:rgb(12,100,192); font-family:"Times New Roman",Times,serif"></span></b><span style="color:rgb(12,100,192); font-family:"Times New Roman",Times,serif">A
ferro-rotational order describes a ferroically ordered state of an axial vector moment that is invariant under both spatial inversion and time reversal operations. This order was first theoretically proposed to complete the classification of ferroics with
vector order parameters, and now is the last remaining class to be revealed after the discoveries of ferro-toroidal, ferromagnetic, and ferroelectric orders. More recently, this order is suggested to exist in a good number of complex oxides and is responsible
for several novel quantum phenomena including the type-II multiferroic order. In this talk, I will present our studies of the ferro-rotational order in a type-II multiferroic material RbFe(MoO4)2 using high sensitivity rotational anisotropy second harmonic
generation (RA-SHG). I will show that the higher order electric quadrupole contribution to SHG has been exploited to investigate this inversion-symmetry-preserved ferro-rotational order. I will then reveal several physical properties of this ferro-rotational
order including its symmetry, domain distributions, temperature evolutions, and conjugate coupling field. I will further discuss the significance of understanding this ferro-rotational order in device applications and the new opportunities brought by the state-of-the-art
SHG spectroscopy and microscopy.</span><b><span style="color:rgb(12,100,192); font-family:"Times New Roman",Times,serif"><br>
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<span style="font-family:"Times New Roman",serif; color:rgb(12,100,192); background-color:rgba(0,0,0,0)"><b><span style="color:rgb(12,100,192); font-family:"Times New Roman",Times,serif">Short Bio</span></b></span><span style="font-family:"Times New Roman",serif; color:rgb(12,100,192); background-color:rgba(0,0,0,0)">:</span><span style="font-size:12pt; font-family:"Times New Roman",serif; color:rgb(12,100,192)"></span><span style="font-size:12pt; font-family:"Times New Roman",serif; color:rgb(12,100,192)"></span><span style="font-size:12.0pt; font-family:"Times New Roman",serif"><span style="font-size:12pt; background-color:rgba(0,0,0,0)"></span></span></p>
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<span class="x_x_elementToProof" style="font-family:"Times New Roman",Times,serif; font-size:12pt; line-height:normal; color:rgb(12,100,192)">Dr. Wencan Jin is an Assistant Professor in Department of Physics at Auburn University. He received his Ph.D. from
the Department of Applied Physics at Columbia University in 2017, advised by Prof. Richard M. Osgood. From 2017 to 2019, he worked in Prof. Liuyan Zhao’s group in the Department of Physics at the University of Michigan, Ann Arbor as a postdoctoral researcher.
His research focuses on investigating electronic and magnetic phases of quantum materials using synchrotron-based photoemission spectroscopy and linear/nonlinear optical spectroscopy techniques.
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