@article{ecdf840f6a4148e89ea143b4fd36d934,
title = "Massive Suppression of Proximity Pairing in Topological (Bi1-xSbx)2Te3 Films on Niobium",
abstract = "Interfacing bulk conducting topological Bi2Se3 films with s-wave superconductors initiates strong superconducting order in the nontrivial surface states. However, bulk insulating topological (Bi1-xSbx)2Te3 films on bulk Nb instead exhibit a giant attenuation of surface superconductivity, even for films only two layers thick. This massive suppression of proximity pairing is evidenced by ultrahigh-resolution band mappings and by contrasting quantified superconducting gaps with those of heavily n-doped topological Bi2Se3/Nb. The results underscore the limitations of using superconducting proximity effects to realize topological superconductivity in nearly intrinsic systems. ",
author = "Hlevyack, {Joseph A.} and Hlevyack, {Joseph A.} and Sahand Najafzadeh and Lin, {Meng Kai} and Lin, {Meng Kai} and Takahiro Hashimoto and Tsubaki Nagashima and Akihiro Tsuzuki and Akiko Fukushima and C{\'e}dric Bareille and Yang Bai and Yang Bai and Peng Chen and Peng Chen and Peng Chen and Peng Chen and Liu, {Ro Ya} and Liu, {Ro Ya} and Liu, {Ro Ya} and Yao Li and Yao Li and David Fl{\"o}totto and Jos{\'e} Avila and Eckstein, {James N.} and Shik Shin and Kozo Okazaki and Chiang, {T. C.} and Chiang, {T. C.}",
note = "Funding Information: This work was supported by the U.S. Department of Energy (DOE), Office of Science (OS), Office of Basic Energy Sciences, Division of Materials Science and Engineering, under Award No. DE-FG02-07ER46383 (T. C. C.), by the Ministry of Education, Culture, Sports, Science and Technology, Japan, Japan Society for the Promotion of Science KAKENHI, under Grants No. JP19H00651, No. JP19H01818, and No. JP19H05826 (K. O.), and by the Army Research Office (ARO) under Award No. W911NF-19-1-0067 (J. N. E) and the National Science Foundation (NSF) under Award No. DMR 18-36710 (J. N. E). We acknowledge that this work was partly carried out in the Central Research Facilities at the Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign; we are grateful to the staff T. Shang, F. Rao, and M. Sardela (Central Research Facilities, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign) for providing support during the sample preparation. Synchrotron SOLEIL is supported by the Centre National de la Recherche Scientifique (CNRS) and the Commissariat {\~A} l{\^a}€{\texttrademark}Energie Atomique et aux Energies Alternatives (CEA), France. This work was also supported by a public grant by the French National Research Agency (ANR) as part of the {\^a}€{\oe}Investissements d{\^a}€{\texttrademark}Avenir{\^a}€ (reference: ANR-17-CE09-0016-05) Funding Information: This work was supported by the U.S. Department of Energy (DOE), Office of Science (OS), Office of Basic Energy Sciences, Division of Materials Science and Engineering, under Award No. DE-FG02-07ER46383 (T. C. C.), by the Ministry of Education, Culture, Sports, Science and Technology, Japan, Japan Society for the Promotion of Science KAKENHI, under Grants No. JP19H00651, No. JP19H01818, and No. JP19H05826 (K. O.), and by the Army Research Office (ARO) under Award No. W911NF-19-1-0067 (J. N. E) and the National Science Foundation (NSF) under Award No. DMR 18-36710 (J. N. E). We acknowledge that this work was partly carried out in the Central Research Facilities at the Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign; we are grateful to the staff T. Shang, F. Rao, and M. Sardela (Central Research Facilities, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign) for providing support during the sample preparation. Synchrotron SOLEIL is supported by the Centre National de la Recherche Scientifique (CNRS) and the Commissariat {\`a} l{\textquoteright}Energie Atomique et aux Energies Alternatives (CEA), France. This work was also supported by a public grant by the French National Research Agency (ANR) as part of the “Investissements d{\textquoteright}Avenir” (reference: ANR-17-CE09-0016-05). Publisher Copyright: {\textcopyright} 2020 American Physical Society.",
year = "2020",
month = jun,
day = "12",
doi = "10.1103/PhysRevLett.124.236402",
language = "English (US)",
volume = "124",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "23",
}