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UID:7b02e1b0-bdc2-459d-a4c0-4f781dcb2cf4@events.stage.louisville.edu
DTSTAMP:20260501T022338Z
DTSTART:20260410T190000Z
DTEND:20260410T200000Z
SUMMARY:Colloquium (Ramakrishna Podila): Disorder and interfaces in energy 
 materials: from quantum localization to machine-learned thermal transport
CONTACT:Swagato Banerjee\, 5028520915\, email:swagato.banerjee@louisville.e
 du
DESCRIPTION:Speaker: Dr. Ramakrishna Podila (Clemson University)\n\nPlace:
  Natural Sciences Building, Room 112 \n\nTitle:\n\nDisorder and interfac
 es in energy materials: from quantum localization to machine-learned therm
 al transport\n\nAbstract:\n\nQuantum interference in randomly disordered s
 ystems can lead to localization phenomena that fundamentally reshape elect
 ronic and thermal transport, offering new opportunities for energy applica
 tions. In this talk, I will discuss our recent work exploring Anderson loc
 alization and its impact on thermoelectric transport in defect-engineered 
 graphene.\n\nControlled disorder is introduced in graphene through ion irr
 adiation, allowing the inter-defect spacing to be systematically tuned and
  quantified using Raman spectroscopy. Electrical transport, thermopower me
 asurements, and tight-binding simulations reveal the emergence of quantum 
 interference–induced localization as the defect spacing approaches a cri
 tical threshold. Near this regime, ultrafast reflectance shows that carrie
 r relaxation times peak and electrical resistivity exhibits signatures of 
 hopping-dominated transport.\n\nRemarkably, the localization regime also p
 roduces a pronounced enhancement in thermoelectric properties. Temperature
 -dependent measurements show that both the power factor and the thermoelec
 tric figure of merit reach maxima near the critical defect spacing, provid
 ing experimental evidence that disorder-driven localization can enhance th
 ermoelectric performance through energy filtering near mobility edges.\n\n
 I will conclude by discussing how physics-informed machine learning approa
 ches are being explored in measuring thermal transport properties in compo
 site materials . Together, these studies illustrate how disorder, quantum 
 interference, and data-driven approaches can be combined to understand and
  engineer transport in energy materials.  
GEO:38.2139;-85.7597
LOCATION:Natural Sciences Building
URL:https://events.stage.louisville.edu/events/colloquium-ramakrishna-podil
 a-disorder-and-interfaces-energy-materials-quantum-0
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