Publications and Talks

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Journal Papers

Zhu, T.; Dartiailh, M.C.; Sardashti, K.; Han, J. E.; Matos-Abiague, A.; Shabani, J.; Zútic, I. “Fusion of Majorana Bound States with Mini Gate Control in Two-Dimensional Systems”, preprint available at arXiv:2101.09272.

Sardashti, K.; Nguyen, D.T.; Sarney, W. L.; Leff, A. C.; Hatefipour, M.; Dartiailh, M.C.; Yuan, J.; Mayer, W.; Shabani, J. “Observation of Distinct Superconducting Phases in Hyperdoped p-type Germanium”, preprint available at arXiv:2008.06067.

Yuan, J.; Wickramasinghe, K.; Strickland, W.; Dartiailh, M.; Sardashti, K.; Barati, F.; Hatefipour, M.; Shabani, J. “Epitaxial Superconductor-Semiconductor Structures for Tunable Quantum Circuits”, Journal of Vacuum Science & Technology A 39, 033407 (2021).

Sardashti, K.; Nguyen, D.T.; Hatefipour, M.; Sarney, W. L.; Yuan, J.; Mayer, W.; Kisslinger, K.; Shabani, J. “Tailoring Superconducting Phases Observed in Hyperdoped Si:Ga for Cryogenic Circuit Applications”, Applied Physics Letters 118, 073102 (2021).

Barati, F.; Thompson, J.P.; Dartiailh, M.C.; Sardashti, K.; Mayer, W.; Wickramasinghe, K.; Taniguchi, T.; Watanabe, K.; Churchill, H.; Shabani, J. “Tuning supercurrent in Josephson junctions using hBN as the gate dielectric”, Nano Letters 21,1915–1920 (2021).

Sardashti, K.; Dartiailh, M.C.; Yuan, Joseph.; Hart, Sean.; Gumann, Pat.; Shabani, J. “Voltage Voltage-tunable superconducting resonators: a platform for random access quantum memory”, IEEE Transactions on Quantum Engineering 1 (2020) p.1-7.

Cuniberto, E.; Alharbi, A.; Wu, T.; Huang, Z.; Sardashti, K.; You. K. D.; Kisslinger, K.; Taniguchi, T.; Watanabe, K.; Kiani, R.; Shahrjerdi, D. “Design and fabrication of miniaturized electrochemical sensors using nano-graphitic carbon”, Scientific Reports 10, 9444 (2020).

Yuan, J.; Hatefipour, M.; Magill, B.A.; Mayer, W.; Dartiailh, M.C.; Sardashti, K.; Wickramasinghe, K.S.; Lu, T.M.; Khodaparast, G.A.; Matsuda, Y.H.; Kohama, Y.; Yang, Z.; Thapa, S.; Stanton, C.J.; Shabani, J. “Experimental Measurements and Modeling of Electron Effective Mass and Effective g-Factor in Near Surface InAs Quantum Wells”, Physical Review B 101, 20 (2020).

Khazaee M.; Sardashti, K.; Chung, C; Sun, JP; Zhou, H; Bergmann, E; Dunlap-Shohl, W.A.; Han, Q; Hill, I.G.; Jones, J.L; Lupascu, D.C.; Mitzi, D.B. “Dual-Source Evaporation of Silver Bismuth Iodide Films for Planar Junction Solar Cells”, Journal of Materials Chemistry A 7 (2019).

Iljo, K; Sardashti, K; Clemons, M.S.; Ueda, S.T.; Fruhberger, B.; Oktyabrsky, S; Kummel, A.C. “HfO2/Al2O3 Nanolaminate on Si0.7Ge0.3(100) Surface by Thermal Atomic Layer Deposition”, ECS Transactions 86, 7, (2018).

Khazaee, M.; Sardashti, K.; Sun, J.P.; Clegg, C.; Zhou, H.; Hill, I.G.; Jones, J.L.; Lupascu, D.C.; Mitzi, D.B. “A Versatile Thin-Film Deposition Method for Multidimensional Semiconducting Bismuth Halides”, Chemistry of Materials 30 (2018).

Wolf S.; Edmonds M.; Sardashti, K.; Clemons M.S.; Park J.H.; Yoshida N.; Dong L.; Nemani S.; Yieh E.; Holmes R.; Alvarez D.; Kummel A.C. “Low-Temperature Amorphous Boron Nitride on Si0.7Ge0.3(001), Cu, and HOPG from Sequential Exposures of N2H4 and BCl3”, Applied Surface Science 439 (2018).

Sardashti, K.; Chagarov E.; Antunez, P.; Gershon, T.; Ueda, S.T.; Gokmen, T.; Bishop, D.; Haight R.; Kummel A.C. “Potential Control Layers for Engineering the Backside Surfaces of Thin-Film Solar Cells”, ACS Applied Materials & Interfaces 9 (2017).

Gershon, T.; Sardashti, K.; Lee, Y.S.; Gunawan, O.; Singh, S.; Bishop, D.; Kummel A.C.; Haight R. “Compositional effects in Ag2ZnSnSe4 thin films and photovoltaic device”, Acta Materialia 126 (2017). (* equal contribution).

Edmonds M.; Sardashti, K.; Wolf S.; Chagarov E.; Clemons M.S.; Kent T.; Park J.; Tang K.; McIntyre P.C.; Yoshida N.; Dong L.; Tsai W.; Luan H.; Fang Z.; Holmes R.; Alvarez D.; Kummel A.C. “Low Temperature Thermal ALD of a SiNx Interfacial Diffusion Barrier and Interface Passivation Layer on SixGe1-x(001) and SixGe1-x (110)”, Journal of Chemical Physics 146 (2017).

Haight, R.; Gershon, T.; Gunawan, O.; Antunez, P.; Bishop, D.; Lee, Y.S.; Gokmen, T.; Sardashti, K.; Chagarov E.; Kummel A.C. “Industrial perspectives on earth abundant, multinary thin film photovoltaics”, Semiconductor Science and Technology 32 (2017).

Sardashti, K.; Paul, D.; Hitzman, C.; Hammond, J.; Haight R.; Kummel A.C. “Nano-scale Compositional Analysis of Surfaces and Interfaces in Earth-abundant Kesterite Solar Cells”, Journal of Materials Research (invited feature paper) 31 (2016).

Sardashti, K.; Haight R.; Anderson R.; Contreras M.; Fruhberger B.; Kummel A.C. “Grazing Incidence Cross-sectioning of Thin-Film Solar Cells via Cryogenic Focused Ion Beam: A case study on CIGSe”, ACS Applied Materials & Interfaces 8 (2016).

Sardashti, K.; Hu, K.T.; Tang, K.; Madisetti S.; McIntyre, P.C.; Oktyabrsky, S; Siddiqui, S.; Sahu, B.; Yoshida, N.; Kachian, J.; Kummel A.C. “Silicon-nitride passivation of the interface between SiGe and high-k dielectrics”, Applied Physics Letters 108 (2016).

Sardashti, K.; Hu, K.T.; Park, S.; Kim, H.; Tang, K.; Madisetti S.; McIntyre, P.C.; Oktyabrsky, S; Siddiqui, S.; Sahu, B.; Yoshida, N.; Kachian, J.; Kummel A.C. “Sulfur passivation for formation of Si-terminated Al2O3/SiGe(001) Interfaces”, Applied Surface Science 366 (2016).

Chagarov E.; Sardashti, K.; Lee, Y.; Haight R.A.; Kummel A.C.; Gershon, T. “Ag2ZnSn(S,Se)4: A highly-promising absorber for thin film photovoltaics”, Journal of Chemical Physics 144 (2016), (* equal contribution).

Gershon, T.; Sardashti, K.; Lee, Y.S.; Haight R.; Kummel A.C. “First demonstration of working AZTSe devices with 5.2% efficiency”, Advanced Energy Materials 6 (2016).

Chagarov E.; Sardashti, K.; Haight R.; Mitzi D.B.; Kummel A.C. “Density-Functional Theory Computer Simulations of CZTS0.25Se0.75 Alloy Phase Diagrams”, Journal of Chemical Physics 145 (2016).

Park J.H.; Fathipour S.; Kwak I.; Sardashti, K.; Ahles C.F.; Vishwanath S.; Xing H.G.; Fullerton-Shirey S.K; Seabaugh A.; Kummel A.C. “Atomic Layer Deposition of Al2O3 on WSe2 Functionalized by Titanyl Phthalocyanine”, ACS Nano 10 (2016).

Sardashti, K.; Haight R.; Gokmen T.; Chang L.; Wang W.; Mitzi D.B.; Kummel A.C. “Impact of Nano-scale elemental distribution in high performance of kesterite solar cells”, Advanced Energy Materials 5 (2015).

Chagarov E.; Sardashti, K.; Kaufman-Osborn T.; Madisetti S.; Oktyabrsky S.; Sahu B.; Kummel A.C. “Density-functional theory molecular dynamics simulations and experimental characterization of alpha-Al2O3/SiGe interfaces”, ACS Applied Materials & Interfaces 7 (2015).

Park J.H.; Movva H; Chagarov E; Sardashti, K.; Chou H; Kwak I; Hu K.T; Fullerton-Shirey S; Choudhury P; Banerjee S; Kummel A.C. “In-Situ Observation of Sub-nanometer Dielectric Growth with Ultrahigh Nucleation Density on Two-Dimensional Surfaces”, Nano Letters 15 (2015).

Edmonds M.; Kent T.; Chagarov E.; Sardashti, K.; Hu K.T.; Kachian J.; Yoshida N.; Kummel A.C. “Si passivation of InGaAs surfaces by Atomic Layer Deposition”, Journal of American Chemical Society 137 (2015).

Bashouti, Y. M.; Sardashti, K.; Ristein J.; Christiansen S. “Kinetic Study of H-terminated SiNWs Oxidation in Very First Stages”, Journal of Nanoscale Research 8 (2013) (* equal contribution).

Bashouti, Y. M.; Sardashti, K.; Schmitt, S. W.; Pietsch M.; Ristein J.; Haick H.; Christiansen S. “Oxide-free Hybrid Silicon Nanowires: From Fundamentals to Applied Nanotechnology”, Progress in Surface Science 88 (2013).

Bashouti, Y. M.; Sardashti, K.; Ristein J.; Christiansen S. “Early stages of oxide growth in H-terminated silicon nanowires: determination of kinetic behavior and activation energy” Physical Chemistry Chemical Physics 14 (2012).

Conference Proceedings

Chagarov E.; Sardashti, K.; Kwak, I.; Ueda, S.; Yakimov, M.; Kummel A.C. “Density functional theory molecular dynamics simulations and experimental measurements of a-HfO2/a-SiO/SiGe(001) and a-HfO2/a-SiO2/SiGe(001) interfaces”, 2017 International Symposium on VLSI Technology, Systems and Application (VLSI-TSA) pp. 1-2 (2017).

Chagarov E.; Sardashti, K.; Clemons M.S.; Edmonds M.; Kummel A.C. “Density Functional Theory Simulations and Experimental Measurements of a-HfO2/a-Si3N4/SiGe, a-HfO2/SiO0.8N0.8/SiGe and a-HfO2/a-SiO/SiGe interfaces”, 2016 IEEE International Electron Devices Meeting (IEDM) pp. 36.4.1-36.4.4 (2016).

Book Chapters

Muhammad Y. Bashouti, Matthias Pietsch, Kasra Sardashti, Jüergen Ristein, Hossam Haick, Silke Christiansen “Hybrid Silicon Nanowire: From Basic Science to Applied Nanotechnology”, Nanowires - Recent Advances, INTECH OPEN, ISBN 980-953-307-525-4.

Patents

Shabani, J.; Sardashti K.; “Systems and Methods for Qubit Fabrication”, Provisional U.S. Patent 16/846,043 (2020).

Fang, Z.W.; Luan, H.F.; Tsai, W.; Sardashti K.; Clemons, M.; Ueda, S.T.; Kavrik, M.S.; Kwak, I.; Kummel A.C.; Chang, H.P.; “Nanolaminate Dielectrics and ALD Deposition on Silicon Germanium Substrates”, U.S. Patent 10840350 (2020).

Kwak, I.; Sardashti K.; Kummel A.C. “Nanolaminate Dielectrics and ALD Deposition on 2D Substrates and 3D Materials”, Provisional U.S. Patent 15/832,212 (2018).

Sardashti K.; Kaufman-Osborn, T.; Kent, T.; Kummel A.C. “Low Temperature Atomic Layer Deposition of Al2O3 and HfO2 on Silicon-Germanium”, US Patent 10134585 (2018).

Conference Presentations

“An Investigation into the Characteristics of the Superconductive Phase in Heavily P-doped Germanium”, APS march meeting – Denver CO, Mar. 2020 (cancelled due to COVID-19 Outbreak).

“Realization of Hybrid Superconductor–Semiconductor Systems by Homoepitaxial Growth of Non-equilibrium p-doped Si”, MRS spring meeting – Phoenix AZ, Apr. 2019.

“Realization of Hybrid Superconductor-Semiconductor Systems by Homoepitaxial Growth of Non-equilibrium P-doped Si (111)”, APS march meeting – Boston MA, Mar. 2019.

“Passivation of Interfaces Between High-k Oxides and SiGe: Ex Situ Wet Clean vs. In Situ Nitridation”, 63rd AVS meeting – Nashville TN, Nov. 2016.

“Characterization of Grain Boundaries and Back Contacts in Polycrystalline Thin Film Solar Cells”, MRS spring meeting 2016 – Phoenix AZ, Apr. 2016.

“Characterization of Grain Boundaries in Cu2ZnSn(S,Se)4, Cu(In,Ga)Se2 and Ag2ZnSnSe4 by NanoAuger and Kelvin Probe Force Microscopy”, MRS fall meeting 2015 – Boston MA, Dec. 2015.

“Ex-situ S-passivation of Al2O3/SiGe (001) interfaces”, 62nd AVS meeting – San Jose CA, Oct. 2015.

“Chemical and Electrical Characterization of Polycrystalline CZTSSe and CIGSe Grain Boundaries by NanoAuger and Kelvin Probe Force Microscopy (KPFM)”, 62nd AVS meeting – San Jose CA, Oct. 2015.

“Atomic Layer Deposition of Al2O3 on SiGe (001)”, SRC TECHCON 2015 – Austin TX, Sept. 2015.

“Chemical and Electrical Characterization of Cu2ZnSn(SX,Se1-X)4 Grain Boundaries”, MRS Spring Meeting 2015 – San Francisco CA, Apr. 2015.

“Chemical and Electrical Characterization of CZTSSe Grain Boundaries”, 61st AVS Meeting – Baltimore MD, Nov. 2014.

“Fast gateless C-V characterization of gate oxides using ultra-high precision capacitance bridge and atomic force microscope”, MRS Spring Meeting 2014 – San Francisco CA, Apr. 2014.

“Fast Gateless C-V measurements via Capacitance Force Microscopy”, 60th AVS meeting – Long Beach CA, Oct. 2013.

Invited Talks

“Engineering Interfaces in Hybrid Superconductor–Semiconductor Systems: A Key to Highly Scalable Quantum Devices”, March 2020 – Mork Family Department Seminar, University of Southern California (Los Angeles, CA).

“Hybrid Superconductor–Semiconductor Material Platforms for Quantum Information Processing”, January 2020 – Department of Physics Colloquium, Clemson University (Clemson, SC).

“Nanoscale Characterization of Surfaces and Interfaces in Thin Film Kesterite Solar Cells”, November 2016 – Duke University (Durham, NC).

“Characterization of CZTS-Se grains and grain boundaries composition via Auger Nanoprobe Microscopy”, December 2014 - Physical Electronics Inc. (Chanhassen, MN).