@article{38e86f3d22254aedad711aefd06a74dc,
title = " Unusual Conductance Fluctuations and Quantum Oscillation in Mesoscopic Topological Insulator PbBi 4 Te 7 ",
abstract = " We present a detail study of Shubinikov-de-Haas (SdH) oscillations accompanied by conductance fluctuations in a mesoscopic topological insulator PbBi 4 Te 7 device. From SdH oscillations, the evidence of Dirac fermions with π Berry phase is found and the experimentally determined two main Fermi wave vectors are correlated to two surface Dirac cones (buried one inside the other) of layered topological insulator PbBi 4 Te 7 . We have also found evidence of conductance fluctuations, the root mean square amplitude of which is much higher than the usual universal conductance fluctuations observed in nanometer size sample. Calculated autocorrelation functions indicate periodic unique fluctuations may be associated with the topological surface states in the compound. ",
author = "Priyanath Mal and Bipul Das and Archana Lakhani and Ganesh Bera and Turpu, {G. R.} and Wu, {Jong Ching} and Tomy, {C. V.} and Pradip Das",
note = "Funding Information: Pradip Das and Priyanath Mal acknowledge the Department of Science and Technology for partial support through project no. SR/FTP/PS-197/2012. Priyanath Mal thanks also to CSIR, New Delhi for the fellowship through Senior Research Fellowship Award. P.D. and G.R.T. also acknowledge UGC-DAE CSR, Indore center for the financial support through the project ref. no. CSR-IC-MSRSR-22/CRS-230/2017-18/1311. B.D., J.-C.W. Funding Information: acknowledge MOST for the research project grant through MOST 104-2112-M-018-001-MY3. The Authors of GGV are acknowledging UGC, Govt. of India for supporting the Department of Pure and Applied Physics through UGC SAP DRS -I and FIST Level -I programs, respectively.",
year = "2019",
month = dec,
day = "1",
doi = "10.1038/s41598-019-43534-7",
language = "English",
volume = "9",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",
number = "1",
}