2024

Ajit Kumar Dash, Sharad Kumar Yadav, Sebastien Roux, Manavendra Pratap Singh, Kenji Watanabe, Takashi Taniguchi, Akshay Naik, Cedric Robert, Xavier Marie, Akshay Singh, “Quantum light generation with ultra-high spatial resolution in 2D semiconductors via ultra-low energy electron irradiation”, arxiv preprint at https://arxiv.org/abs/2409.10321

Manavendra Singh, Ranju D, Akshay Singh, Akshay Naik, “Electron beam dose-modulated 3D structures and their application in the enhancement of Raman and Photoluminescence intensity of 2D materials”, submitted

Abhinav Sinha, Manvi Verma, Nandeesh Kumar K M, Keerthana S Kumar, Ananth Govind Rajan, Akshay Singh, “Critical Role of Precursor Flux in Modulating Nucleation Density in 2D Material Synthesis Revealed by Digital Twin”, submitted, preprint at https://doi.org/10.21203/rs.3.rs-4957545/v1

Harsimran Kaur Mann, Mainak Mondal, Vivek Sah, Kenji Watanabe, Takashi Taniguchi, Akshay Singh, Aveek Bid, “Optical control of multiple resistance levels in graphene for memristic applications”, npj 2D Materials and Applications, 8 69 2024, https://doi.org/10.1038/s41699-024-00503-7 ;  arxiv https://arxiv.org/abs/2407.13387

Saroj Poudyal, Mrinal Deka, Priyo Adhikary, Ranju Dalal, Prahalad Barman, Renu Yadav, Bubnu Biswal, Ramesh Rajarapu, Shantanu Mukherjee, Birabar Nanda, Akshay Singh, Abhishek Misra, “Room Temperature, Twist Angle Independent, Momentum Direct Interlayer Excitons in van der Waals heterostructures with Wide Spectral Tunability”, Nano Letters 24 9575 2024, https://pubs.acs.org/doi/10.1021/acs.nanolett.4c02180

Mainak Mondal, Pawni Manchanda, Soumadeep Saha, Abhishek Jangid, Akshay Singh, “Quantification of 2D Interfaces: Quality of heterostructures, and what is inside a nanobubble”, Cover Article at ACS Applied Materials and Interfaces 16 42608 2024, https://pubs.acs.org/doi/full/10.1021/acsami.4c06916; arxiv https://arxiv.org/abs/2404.16441

Subha Biswas, Mainak Mondal, Gokul Chandrasekharan, Akshay Singh, Anoop Thomas, “Electronic Strong Coupling Modifies the Ground-state Intermolecular Interactions in Chlorin Thin Films”, chemrxiv preprint at https://chemrxiv.org/engage/chemrxiv/article-details/65e9863c9138d23161e9df4b

Keerthana S Kumar, Ajit Kumar Dash, Manvi Verma, Vivek Kumar, Kenji Watanabe, Takashi Taniguchi, Gopalakrishnan Sai Gautam, Akshay Singh, “Towards a comprehensive understanding of the low energy luminescence peak in 2D materials”, 2D Materials 11 045003 2024, https://iopscience.iop.org/article/10.1088/2053-1583/ad4e44, arxiv link : https://arxiv.org/abs/2312.14604

2023

Ajit Kumar Dash, Hariharan Swaminathan, Ethan Berger, Mainak Mondal, Touko Lehenkari, Pushp Raj Prasad, Kenji Watanabe, Takashi Taniguchi, Hannu-Pekka Komsa, Akshay Singh, “Evidence of defect formation in monolayer MoS2 at ultralow accelerating voltage electron irradiation”, 2D Materials 10 035002 2023, https://iopscience.iop.org/article/10.1088/2053-1583/acc7b6/meta , arxiv link : https://arxiv.org/abs/2210.04662

2022

Mainak Mondal, Ajit Kumar Dash, Akshay Singh, “Optical microscope based universal parameter for identifying layer number in two-dimensional materials”, ACS Nano (2022) https://pubs.acs.org/doi/10.1021/acsnano.2c04833 , arxiv link:http://arxiv.org/abs/2204.12745 , author link: https://pubs.acs.org/articlesonrequest/AOR-ZVIRKNHMPHXAV8HY6NYJ

Rahul Debnath, Shaili Sett, Sudipta Kundu, Rabindra Biswas, Varun Raghunathan, Manish Jain, Arindam Ghosh, and Akshay Singh,  “Tuning exciton complexes in twisted bilayer WSe2 at intermediate misorientation”, Physical Review B 106 125409 (2022), https://link.aps.org/doi/10.1103/PhysRevB.106.125409, arxiv link: https://arxiv.org/abs/2209.03524

2021

Junho Choi, Matthias Florian, Alexander Steinhoff, Daniel Erben, Kha Tran, Dong Seob Kim, Liuyang Sun, Jiamin Quan, Robert Claassen, Somak Majumder, Jennifer A Hollingsworth, Takashi Taniguchi, Kenji Watanabe, Keiji Ueno, Akshay Singh, Galan Moody, Frank Jahnke, Xiaoqin Li, “Twist Angle-Dependent Interlayer Exciton Lifetimes in van der Waals Heterostructures”, Physical Review Letters 126 (4), 047401 (2021); https://doi.org/10.1103/PhysRevLett.126.047401

Ajit Kumar Dash, Mainak Mondal, Manvi Verma, Keerthana S Kumar, Akshay Singh, “Effect of electron-irradiation on layered quantum materials”, Bulletin of Materials Science 44, 227 (2021); https://doi.org/10.1007/s12034-021-02516-0

2020

Kha Tran, Junho Choi, Akshay Singh, “Moiré and beyond in transition metal dichalcogenide twisted bilayers”, 2D Materials 8 (2), 022002 (2020); https://doi.org/10.1088/2053-1583/abd3e7

Seong Soon Jo, Akshay Singh, Liqiu Yang, Subodh C Tiwari, Sungwook Hong, Aravind Krishnamoorthy, Maria Gabriela Sales, Sean M Oliver, Joshua Fox, Randal L Cavalero, David W Snyder, Patrick M Vora, Stephen J McDonnell, Priya Vashishta, Rajiv K Kalia, Aiichiro Nakano, Rafael Jaramillo, “Growth Kinetics and Atomistic Mechanisms of Native Oxidation of ZrS x Se2–x and MoS2 Crystals”, Nano Letters 20, 8592–8599 (2020); https://doi.org/10.1021/acs.nanolett.0c03263

Akshay Singh, Seong Soon Jo, Yifei Li, Changming Wu, Mo Li, Rafael Jaramillo, “Refractive Uses of Layered and Two-Dimensional Materials for Integrated Photonics”, ACS Photonics 7 (12), 3270-3285 (2020); http://10.1021/acsphotonics.0c00915

Yifei Li, Akshay Singh, Kate Reidy, Seong Soon Jo, Frances M Ross, Rafael Jaramillo, “Making Large‐Area Titanium Disulfide Films at Reduced Temperature by Balancing the Kinetics of Sulfurization and Roughening”, Advanced Functional Materials 30 (36), 2003617 (2020); https://doi.org/10.1002/adfm.202003617

Sean M Oliver, Joshua J Fox, Arsalan Hashemi, Akshay Singh, Randal L Cavalero, Sam Yee, David W Snyder, R Jaramillo, Hannu-Pekka Komsa, Patrick M Vora, “Phonons and excitons in ZrSe2–ZrS2 alloys”, Journal of Materials Chemistry C, 8, 5732 (2020); https://doi.org/10.1039/D0TC00731E

Singh, Akshay; Lee, Hae Yeon; Gradecak, Silvija; “Direct Optical-Structure Correlation in Atomically Thin Dichalcogenides and Heterostructures”, Nano-Research, 11, 1 (2020); https://doi.org/10.1007/s12274-019-2601-7

Jo, Seong Soon; Li, Yifei; Singh, Akshay; Kumar, Abinash; Frisone, Sam; LeBeau, James M; Jaramillo, Rafael; “Formation of large-area MoS2 thin films by oxygen-catalyzed sulfurization of Mo thin films”, Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 38, 13405 (2020); https://doi.org/10.1116/1.5132748

2019

Zhao, Zhibo; Singh, Akshay; Chesin, Jordan; Armitage, Rob; Wildeson, Isaac; Deb, Parijat; Armstrong, Andrew; Kisslinger, Kim; Stach, Eric A; Gradečak, Silvija;  “Cathodoluminescence as an effective probe of carrier transport and deep level defects in droop-mitigating InGaN/GaN quantum well heterostructures”, Applied Physics Express, 12, 34003 (2019); https://doi.org/10.7567/1882-0786/ab0341

Tran, Kha; Moody, Galan; Wu, Fengcheng; Lu, Xiaobo; Choi, Junho; Kim, Kyounghwan; Rai, Amritesh; Sanchez, Daniel A; Quan, Jiamin; Singh, Akshay; Jacob Embley, André Zepeda, Marshall Campbell, Travis Autry, Takashi Taniguchi, Kenji Watanabe, Nanshu Lu, Sanjay K Banerjee, Kevin L Silverman, Suenne Kim, Emanuel Tutuc, Li Yang, Allan H MacDonald, Xiaoqin Li, “Evidence for moiré excitons in van der Waals heterostructures”, Nature 567, 71-75 (2019); https://doi.org/10.1038/s41586-019-0975-z

Hentz, Olivia; Singh, Akshay; Zhao, Zhibo; Gradečak, Silvija; “Visualizing Nonradiative Mobile Defects in Organic–Inorganic Perovskite Materials”, Small Methods ,1900110 (2019); https://doi.org/10.1002/smtd.201900110

Singh, Akshay; Li, Yifei; Fodor, Balint; Makai, Laszlo; Zhou, Jian; Xu, Haowei; Akey, Austin; Li, Ju; Jaramillo, R; “Near-infrared optical properties and proposed phase-change usefulness of transition metal disulfides”, Applied Physics Letters, 115, 161902 (2019); https://doi.org/10.1063/1.5124224 

Goodman, Sarah A; Syaranamual, Govindo J; Chung, Jing Yang; Li, Zhang; Singh, Akshay; Su, Dong; Kisslinger, Kim; Armitage, Rob; Wildeson, Isaac; Deb, Parijat; Stach, Eric; Gradecak, Silvija; “Effects of Beam-Induced Carbon Deposition on Electron Energy-Loss Spectroscopy Analysis of Compositional Fluctuations in InGaN/GaN Quantum Well LEDs”, Microscopy and Microanalysis, 25, 652-653 (2019); https://doi.org/10.1017/S1431927619003994

Li, Yifei; Singh, Akshay; Krylyuk, Sergiy; Davydov, Albert; Jaramillo, R; “Near-infrared photonic phase-change properties of transition metal ditellurides”, Low-Dimensional Materials and Devices 2019, 11085, 110850T, (2019); https://doi.org/10.1117/12.2532602

Krayev, Andrey; Bailey, Connor S; Jo, Kiyoung; Wang, Shuo; Singh, Akshay; Darlington, Thomas; Liu, Gang-Yu; Gradecak, Silvija; Schuck, P James; Pop, Eric; Jariwala, Deep; “Dry Transfer of van der Waals Crystals to Noble Metal Surfaces To Enable Characterization of Buried Interfaces”, ACS applied materials & interfaces, 11, 38218-38225 (2019); https://doi.org/10.1021/acsami.9b09798 

2018 and before

Anghel, S; Passmann, F; Singh, A; Ruppert, C; Poshakinskiy, AV; Tarasenko, SA; Moore, JN; Yusa, G; Mano, T; Noda, T; Li, Xiaoqin; Bristow, AD; Betz, Markus; “Field control of anisotropic spin transport and spin helix dynamics in a modulation-doped GaAs quantum well”, Physical Review B, 97, 125410 (2018); https://doi.org/10.1103/physrevb.97.125410

Kolarczik, Mirco; Ulbrich, Christian; Geiregat, Pieter; Zhu, Yunpeng; Sagar, Laxmi Kishore; Singh, Akshay; Herzog, Bastian; Achtstein, Alexander W; Li, Xiaoqin; Van Thourhout, Dries; Hens, Zeger; Owschimikow, Nina; Woggon, Ulrike; “Sideband pump-probe technique resolves nonlinear modulation response of PbS/CdS quantum dots on a silicon nitride waveguide”, APL Photonics, 3, 16101 (2018); https://doi.org/10.1063/1.5005490

Steinhoff, Alexander; Florian, Matthias; Singh, Akshay; Tran, Kha; Kolarczik, Mirco; Helmrich, Sophia; Achtstein, Alexander W; Woggon, Ulrike; Owschimikow, Nina; Jahnke, Frank; Li, Xiaoqin; “Biexciton fine structure in monolayer transition metal dichalcogenides”, Nature Physics, 14, 1199-1204 (2018); https://doi.org/10.1038/s41567-018-0282-x

Hao, Kai; Specht, Judith F; Nagler, Philipp; Xu, Lixiang; Tran, Kha; Singh, Akshay; Dass, Chandriker Kavir; Schüller, Christian; Korn, Tobias; Richter, Marten; Knorr, Andreas; Li, Xiaoqin; Moody, Galan; “Neutral and charged inter-valley biexcitons in monolayer MoSe2”, Nature Communications, 8, ncomms15552 (2017); https://doi.org/10.1038/ncomms15552

Tran, Kha; Singh, Akshay; Seifert, Joe; Wang, Yiping; Hao, Kai; Huang, Jing-Kai; Li, Lain-Jong; Taniguchi, Takashi; Watanabe, Kenji; Li, Xiaoqin; “Disorder-dependent valley properties in monolayer WSe2”, Physical Review B, 96, 41302 (2017); https://doi.org/10.1103/physrevb.96.041302

Singh, Akshay; Moody, Galan; Tran, Kha; Scott, Marie E; Overbeck, Vincent; Berghäuser, Gunnar; Schaibley, John; Seifert, Edward J; Pleskot, Dennis; Gabor, Nathaniel M; Yan, Jiaqiang; Mandrus, David G; Richter, Marten; Malic, Ermin; Xu, Xiaodong; Li, Xiaoqin; “Trion formation dynamics in monolayer transition metal dichalcogenides”, Physical Review B, 93, 41401 (2016); https://doi.org/10.1103/physrevb.93.041401

Hao, Kai; Xu, Lixiang; Nagler, Philipp; Singh, Akshay; Tran, Kha; Dass, Chandriker Kavir; Schüller, Christian; Korn, Tobias; Li, Xiaoqin; Moody, Galan; “Coherent and Incoherent Coupling Dynamics between Neutral and Charged Excitons in Monolayer MoSe2”, Nano Letters, 16, 5109-5113 (2016); https://doi.org/10.1021/acs.nanolett.6b02041

Anghel, Sergiu; Singh, Akshay; Passmann, Felix; Iwata, Hikaru; Moore, John N; Yusa, Go; Li, Xiaoqin; Betz, Markus; “Enhanced spin-polarization lifetimes in a two-dimensional electron gas in a gate-controlled GaAs quantum well”, Physical Review B, 94, 35303 (2016); https://doi.org/10.1103/physrevb.94.035303

Singh, Akshay; Tran, Kha; Kolarczik, Mirco; Seifert, Joe; Wang, Yiping; Hao, Kai; Pleskot, Dennis; Gabor, Nathaniel M; Helmrich, Sophia; Owschimikow, Nina; Woggon, Ulrike; Li, Xiaoqin; “Long-Lived Valley Polarization of Intravalley Trions in Monolayer WSe2”, Physical Review Letters, 117, 257402 (2016); https://doi.org/10.1103/physrevlett.117.257402

Moody, Galan; Dass, Chandriker Kavir; Hao, Kai; Chen, Chang-Hsiao; Li, Lain-Jong; Singh, Akshay; Tran, Kha; Clark, Genevieve; Xu, Xiaodong; Berghäuser, Gunnar; Malic, Ermin; Knorr, Andreas; Li, Xiaoqin; Intrinsic homogeneous linewidth and broadening mechanisms of excitons in monolayer transition metal dichalcogenides, Nature communications, 6, 8315 (2015); https://doi.org/10.1038/ncomms9315

Singh, Akshay; Moody, Galan; Wu, Sanfeng; Wu, Yanwen; Ghimire, Nirmal J; Yan, Jiaqiang; Mandrus, David G; Xu, Xiaodong; Li, Xiaoqin; Coherent Electronic Coupling in Atomically Thin MoSe2, Physical Review Letters, 112, 216804 (2014); https://doi.org/10.1103/physrevlett.112.216804

Shafiei, Farbod; Wu, Chihhui; Wu, Yanwen; Khanikaev, Alexander B; Putzke, Patrick; Singh, Akshay; Li, Xiaoqin; Shvets, Gennady; Plasmonic nano-protractor based on polarization spectro-tomography, Nature Photonics, 7, 367-372 (2013); https://doi.org/10.1038/nphoton.2013.68