NELab Team

Cameron J. Foss

Ph.D. student 2018-current,

M.S. 2016-2018

Blue Waters Undergrad intern 2014-2015

Researchfirst principles methods for the calculation of phonon properties, including dispersion and phonon-phonon coupling. Their application to thermal properties of nanomembranes and 2D materials under strain and across material heterointerfaces.

Discoveriesthermal conductivity in Si and Ge nanomembranes is anisotropic and thickness dependent. Cross-plane thermal conductivity is highly sensitive to strain, with compressive (tensile) strain increasing (decreasing) the conductivity across the membrane, while leaving the in-plane direction unchanged, thus boosting anisotropy.

  • NanoEnergy Lab Alumni:

MeenakshiMeenakshi Upadhyaya

Ph.D. student Fall 2014-Spring 2021

LinkedIn    |      Google Scholar    |     ResearchGate 

Research: thermal transport in disordered semiconductor alloys, nanocomposites, and organic thermoelectrics.

Discoveriesphonon transport in Si-Ge alloy nanowires is superdiffusive, causing the thermal conductivity to increase with the cube root of the nanowire’s length. Dopant-induced disorder and clustering affect the Seebeck vs. conductivity trade-off in polymer thermoelectrics, limiting their TE conversion efficiency. 

Adithya_KomminiAdithya Kommini

Ph.D. Student Fall 2016-Spring 2021

M.S. 2015-2016


 Google Scholar   |    LinkedIn    |     ResearchGate

Researchelectronic transport and thermoelectricity in semiconductor nanostructures using the Wigner formalism.

Discoveriesquantum effects in semiconductor nanostructures can enhance the Seebeck coefficient. Twisted bilayer graphene exhibits high thermoelectric power factors at angles near the so-called “magic” angle.

Peter Pawelski

Undergraduate research, senior honors thesis (2019-2020) and (2020-2021)

XSEDE Empower intern: 

Arnab K. Majee

M.S. 2014-2016, Ph.D. 2016-2020

now at U. New Mexico and Sandia National Lab


Google Scholar | LinkedIn | Researchgate 

Research: thermal and electronic transport in 2D materials, including graphene and transition metal dichalcogenides (TMDCs) such as MoS2.

Discoveriesthermal conductivity in graphene nanoribbons diverges logarithmically with length up to 10 microns in length. Grain boundaries in MoS2 do not contribute significantly to electrical resistance, so polycrystalline MoS2 has nearly the same electrical conductivity as single-crystalline MoS2!

Aliya Qureshi

M.S. student 2018-2020, now at GlobalFoundries

Researchthermal transport simulation from first principles, Density Functional Theory calculations of phonons and anharmonic phonon-phonon interactions, phonon Boltzmann transport equation

Venkatakrishna Dusetty

M.S. student 2016-2020, now at Intel

Research: thermoelectric properties of group IV alloys containing Sn (Si-Sn, Ge-Sn).

Discoveriesthermoelectric properties of Si-Sn alloys are twice as good as those of Si-Ge owing to the large difference in mass between Si and Sn. This makes Si-Sn alloys an interesing potential candidate for high ZT thermoelectrics.

Akshaya Sandeep Waingade

M. S. student 2017-2019

Researchphonon boundary scattering, nanoscale heat transport, phonon Monte Carlo simulation



Nazanin Khatami

M.S. student 2014-2016

Research: thermal transport in Si-Sn and Ge-Sn alloys

Currently: Ph.D. candidate in Mechanical Engineering at UMass


Gabriela Correa2016_Rising_Researcher_Gabriela_Calinao_Correa__js_MG_8592_600px

Undergraduate Researcher

Senior Thesis 2015-2016

Rising Researcher Award 2016

Currently DOE/NSF fellow at Cornell University

Haoxian (Justin) Lin

summer REU student, May-Aug. 2017

Research: electronic and vibrational properties of 2-dimensional materials from first principles using Quantum Espresso calculations. Zone unfolding from supercells.

Recent Posts

Arnab’s work on graphene accepted in Nano Express


Arnab’s last PhD article on transport across extended grain boundaries in graphene is accepted in Nano Express. Here is a link to the article:
A large mismatch in the crystal orientations of adjacent grains in polycrystalline graphene could lead to large electrical resistivity across such GBs. However, in this work we show that due to the meandering nature of a GB, a few “special” regions of the GB provide conductive paths for the charge carriers to flow across them. We simulated 5000 identical GBs (i.e. GBs with the same roughness and correlation lengths) to report statistical mean and standard deviation of resistivities across GBs of varying length. Our results show that shorter GBs exhibit larger variation in resistivities as compared to the longer ones.

  1. Adithya defends his dissertation. Congratulations Dr. Kommini! Leave a reply
  2. Meenakshi defends her dissertation. Congratulations Dr. Upadhyaya! Leave a reply
  3. Arnab defends his dissertation. Congratulations Dr. Majee! Leave a reply
  4. Cameron’s work on thermal transport in 2D alloys published in Phys. Rev. Materials Leave a reply
  5. Adithya’s work on Winger transport in 2D thermoelectrics published in Phys. Rev. Applied Leave a reply
  6. Arnab wins Outstanding TA award Leave a reply
  7. Invited review is top download of 2019 Leave a reply
  8. Dissipation in FL WSe2 published Leave a reply
  9. NETlab receives NSF CDS&E grant Comments Off on NETlab receives NSF CDS&E grant