Publications

Investigation of phonon lifetimes and magnon–phonon coupling in YIG/GGG hybrid magnonic systems in the diffraction limited regime

Manoj Settipalli, Xufeng Zhang, and Sanghamitra Neogi
J. Appl. Phys., 135 (10), 104401 (2024)

Analysis of phonon lifetime and magnon–phonon coupling strength in hybrid magnonic HBAR (high-overtone bulk acoustic wave resonator) structures for high-density, long-lasting quantum memories, and efficient quantum transduction devices.

The effect of electron–phonon and electron-impurity scattering on the electronic transport properties of silicon/germanium superlattices

Manoj Settipalli, Vitaly S. Proshchenko, and Sanghamitra Neogi
J. Mater. Chem. C, 10, 7525-7542 (2022)

First principles study of electronic scattering mechnisms and transport properties of seminconductor heterostructures.

First-principles prediction of electronic transport in fabricated semiconductor heterostructures via physics-aware machine learning

Artem K. Pimachev, and Sanghamitra Neogi
npj Comput. Mater., 7, 93 (2021)

A new machine learning framework that trains on models of small systems and predicts electronic properties of fabricated silicon/germanium heterostructures, matching measured data.

Autonomous Computing Materials

Mark Bathe, Rigoberto Hernandez, Takaki Komiyama, Raghu Machiraju, and Sanghamitra Neogi
ACS Nano, 15, 3, 3586–3592 (2021)

A perspective on our proposed data-driven materials discovery framework, autonomous computing materials, that aims to mimic the brain’s capabilities for integrated sensing, computation, and data storage by programming excitonic, phononic, photonic, and dynamic structural nanoscale materials, without attempting to mimic the unknown implementational details of the brain.

Role of substrate strain to tune energy bands–Seebeck relationship in semiconductor heterostructures

Vitaly S. Proshchenko, Manoj Settipalli, Artem K. Pimachev, and Sanghamitra Neogi
J. Appl. Phys., 129(2), 025301 (2021)

First principles study of the modulated charge transport properties of multilayered seminconductor heterostructures with external substrate induced strain

Anisotropic In-Plane Phonon Transport in Silicon Membranes Guided by Nanoscale Surface Resonators

Sanghamitra Neogi, and Davide Donadio
Phys. Rev. Applied, 14, 024004 (2020)
First observations of anisotropic in-plane thermal transport in thin films or membranes of isotropic semiconductors at room temperature

Theoretical Prediction of Enhanced Thermopower in n-Doped Si/Ge Superlattices Using Effective Mass Approximation

Manoj Settipalli, and Sanghamitra Neogi,
Journal of Elec. Materi., 49, 4431–4442 (2020)
Theoretical study of the charge transport properties of multilayered seminconductor heterostructures with varied composition and strain environment, using effective mass approximation

Optimization of Seebeck coefficients of strain-symmetrized semiconductor heterostructures

Vitaly S. Proshchenko, Manoj Settipalli, and Sanghamitra Neogi,
Appl. Phys. Lett., 115, 211602 (2019)
First principles study of the charge transport properties of multilayered seminconductor heterostructures with varied periods and layer thicknesses

Heat and charge transport in bulk semiconductors with interstitial defects

Vitaly S. Proshchenko, Pratik P. Dholabhai, Tyler C. Sterling, and Sanghamitra Neogi,
Phys. Rev. B, 99, 014207 (2019)
Atomistic and first principles study of the variability of heat and charge transport properties of bulk silicon, in the presence of randomly distributed interstitial defects (Si, Ge, C, and Li)

Native surface oxide turns alloyed silicon membranes into nanophononic metamaterials with ultralow thermal conductivity

Shiyun Xiong, Daniele Selli, Sanghamitra Neogi, and Davide Donadio,
Phys. Rev. B, 95, 180301(R) (2017)
Native oxide layers couple with phonons in ultrathin silicon membranes through local resonances to hinder in-plane phonon transport

Optimal thickness of silicon membranes to achieve maximum thermoelectric efficiency: a first principles study

Claudia Mangold, Sanghamitra Neogi and Davide Donadio, Appl. Phys. Lett., 109(5), 053902 (2016)
First principles study of the electronic properties of ultra-thin crystalline silicon membranes with native oxide surface layers, with thicknesses upto 12 nm

Nanophononics: state of the art and perspectives

Sebastian Volz, Jose Ordonez-Miranda, Andrey Shchepetov, Mika Prunnila, Jouni Ahopelto, Thomas Pezeril, Gwenaelle Vaudel, Vitaly Gusev, Pascal Ruello, Eva M. Weig, Martin Schubert, Mike Hettich, Martin Grossman, Thomas Dekorsy, Francesc Alzina, Bartlomiej Graczykowski, Emigdio Chavez-Angel, J. Sebastian Reparaz, Markus R. Wagner, Clivia M. Sotomayor-Torres, Shiyun Xiong, Sanghamitra Neogi, and Davide Donadio, Eur. Phys. J. B, 89(1), 1-20 (2016)
State of the art in nanophononics: recent achievements and open challenges in nanoscale heat transport, coherent phonon generation and exploitation, and in nano- and optomechanics

Tuning Thermal Transport in Ultrathin Silicon Membranes by Surface Nanoscale Engineering

Sanghamitra Neogi, J. Sebastian Reparaz, Luiz Felipe C. Pereira, Bartlomiej Graczykowski, Markus R. Wagner, Marianna Sledzinska, Andrey Shchepetov, Mika Prunnila, Jouni Ahopelto, Clivia M. Sotomayor-Torres, and Davide Donadio, ACS Nano, 9 (4), pp 3820-3828 (2015)
Surface matters: Huge reduction of heat conduction observed in flat silicon channels

Thermal transport in free-standing silicon membranes: Influence of dimensional reduction and surface nanostructures

Sanghamitra Neogi and Davide Donadio, Eur. Phys. J. B, 88(3), 73 (2015)
Influence of dimensional reduction and surface nanostructures on thermal tranport in free-standing silicon membranes

Transport in nonlinear chains and across several condensed matter interfaces

Sanghamitra Neogi, Ph.D. thesis (2011)
Ph.D. thesis on vibrational energy transport in structures

Pair distribution function of a square-well liquid

Sanghamitra Neogi and Gerald D. Mahan (2009)
Approximate integral equation methods (PY & HNC) to determine structure of liquid

Hydrogen Bonds and Vibrations of Water on (110) Rutile

Nitin Kumar, Sanghamitra Neogi, Paul R. C. Kent, Andrei V. Bandura, James D. Kubicki, David J. Wesolowski, David Cole and Jorge O. Sofo,
J. Phys. Chem. C, 113, 13732-13740 (2009)
Signature of surface interactions on vibrational spectra of water on (110) rutile

Generation of traveling solitons in one-dimensional monatomic quartic lattices

Sanghamitra Neogi and Gerald D. Mahan, Phys. Rev. B, 78(6), 064306 (2008)
Soliton propagation in nonlinear lattice under shock wave impact
Center for Aerospace Structures | Aerospace Engineering Systems | Ann and H.J. Smead Aerospace Engineering Sciences | University of Colorado Boulder
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