skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Twofold symmetry of proximity-induced superconductivity in Bi 2 Te 3 / Bi 2 Sr 2 CaCu 2 O 8 + δ heterostructures revealed by scanning tunneling microscopy

Abstract

We observe proximity-induced superconductivity in in situ prepared heterostructures constructed by topological insulator Bi2Te3 thin films and high-temperature cuprate superconductors Bi2Sr2 CaCu2O8+δ. The superconducting gap maximum is about 7.6 meV on the surface of Bi2Te3 thin films with a thickness of two quintuple layers, and the gap value decreases with an increase in the film thickness. Moreover, the quasiparticle interference data show clear evidence of a twofold symmetric superconducting gap with gap minima along one pair of the principal crystalline axes of Bi2Te3. This gap form is consistent with the Δ4y notation of the topological superconductivity proposed in such systems. Our results provide fruitful information on the possible topological superconductivity induced by the proximity effect in high-temperature superconducting cuprates.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1];  [1];  [2];  [2];  [2];  [1]
  1. Nanjing Univ. (China)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1637481
Report Number(s):
BNL-216110-2020-JAAM
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 101; Journal Issue: 22; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Wan, Siyuan, Gu, Qiangqiang, Li, Huazhou, Yang, Huan, Schneeloch, J., Zhong, R. D., Gu, G. D., and Wen, Hai-Hu. Twofold symmetry of proximity-induced superconductivity in Bi2Te3/Bi2Sr2CaCu2O8+δ heterostructures revealed by scanning tunneling microscopy. United States: N. p., 2020. Web. https://doi.org/10.1103/PhysRevB.101.220503.
Wan, Siyuan, Gu, Qiangqiang, Li, Huazhou, Yang, Huan, Schneeloch, J., Zhong, R. D., Gu, G. D., & Wen, Hai-Hu. Twofold symmetry of proximity-induced superconductivity in Bi2Te3/Bi2Sr2CaCu2O8+δ heterostructures revealed by scanning tunneling microscopy. United States. https://doi.org/10.1103/PhysRevB.101.220503
Wan, Siyuan, Gu, Qiangqiang, Li, Huazhou, Yang, Huan, Schneeloch, J., Zhong, R. D., Gu, G. D., and Wen, Hai-Hu. Mon . "Twofold symmetry of proximity-induced superconductivity in Bi2Te3/Bi2Sr2CaCu2O8+δ heterostructures revealed by scanning tunneling microscopy". United States. https://doi.org/10.1103/PhysRevB.101.220503. https://www.osti.gov/servlets/purl/1637481.
@article{osti_1637481,
title = {Twofold symmetry of proximity-induced superconductivity in Bi2Te3/Bi2Sr2CaCu2O8+δ heterostructures revealed by scanning tunneling microscopy},
author = {Wan, Siyuan and Gu, Qiangqiang and Li, Huazhou and Yang, Huan and Schneeloch, J. and Zhong, R. D. and Gu, G. D. and Wen, Hai-Hu},
abstractNote = {We observe proximity-induced superconductivity in in situ prepared heterostructures constructed by topological insulator Bi2Te3 thin films and high-temperature cuprate superconductors Bi2Sr2 CaCu2O8+δ. The superconducting gap maximum is about 7.6 meV on the surface of Bi2Te3 thin films with a thickness of two quintuple layers, and the gap value decreases with an increase in the film thickness. Moreover, the quasiparticle interference data show clear evidence of a twofold symmetric superconducting gap with gap minima along one pair of the principal crystalline axes of Bi2Te3. This gap form is consistent with the Δ4y notation of the topological superconductivity proposed in such systems. Our results provide fruitful information on the possible topological superconductivity induced by the proximity effect in high-temperature superconducting cuprates.},
doi = {10.1103/PhysRevB.101.220503},
journal = {Physical Review B},
number = 22,
volume = 101,
place = {United States},
year = {2020},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Topological insulators and superconductors
journal, October 2011


Topological Crystalline Insulators and Topological Superconductors: From Concepts to Materials
journal, March 2015


Unpaired Majorana fermions in quantum wires
journal, October 2001


Superconductivity in Cu x Bi 2 Se 3 and its Implications for Pairing in the Undoped Topological Insulator
journal, February 2010


Observation of topological order in a superconducting doped topological insulator
journal, September 2010

  • Wray, L. Andrew; Xu, Su-Yang; Xia, Yuqi
  • Nature Physics, Vol. 6, Issue 11
  • DOI: 10.1038/nphys1762

Superconductivity with Topological Surface State in Sr x Bi 2 Se 3
journal, August 2015

  • Liu, Zhongheng; Yao, Xiong; Shao, Jifeng
  • Journal of the American Chemical Society, Vol. 137, Issue 33
  • DOI: 10.1021/jacs.5b06815

Odd-Parity Topological Superconductors: Theory and Application to Cu x Bi 2 Se 3
journal, August 2010


Topological Superconductivity in Cu x Bi 2 Se 3
journal, November 2011


Majorana Fermions and Exotic Surface Andreev Bound States in Topological Superconductors: Application to Cu x Bi 2 Se 3
journal, March 2012


Evolution of the Fermi surface of a doped topological insulator with carrier concentration
journal, November 2013


Drive the Dirac electrons into Cooper pairs in SrxBi2Se3
journal, February 2017

  • Du, Guan; Shao, Jifeng; Yang, Xiong
  • Nature Communications, Vol. 8, Issue 1
  • DOI: 10.1038/ncomms14466

Topological Phases in the Single-Layer FeSe
journal, September 2014


Topological nature of the FeSe 0.5 Te 0.5 superconductor
journal, September 2015


Topological characters in Fe ( Te 1 x Se x ) thin films
journal, March 2016


Topological Superconductivity on the Surface of Fe-Based Superconductors
journal, July 2016


Observation of topological superconductivity on the surface of an iron-based superconductor
journal, March 2018


Robust and Clean Majorana Zero Mode in the Vortex Core of High-Temperature Superconductor ( Li 0.84 Fe 0.16 ) OHFeSe
journal, December 2018


Zero-energy vortex bound state in the superconducting topological surface state of Fe(Se,Te)
journal, June 2019


Evidence for Majorana bound states in an iron-based superconductor
journal, August 2018


Superconducting Proximity Effect and Majorana Fermions at the Surface of a Topological Insulator
journal, March 2008


The Coexistence of Superconductivity and Topological Order in the Bi 2 Se 3 Thin Films
journal, March 2012


Artificial Topological Superconductor by the Proximity Effect
journal, May 2014


Superconductivity with twofold symmetry in Bi 2 Te 3 /FeTe 0.55 Se 0.45 heterostructures
journal, June 2018


Superconducting proximity effect in a topological insulator using Fe(Te, Se)
journal, June 2018


Realizing Majorana zero modes by proximity effect between topological insulators and d -wave high-temperature superconductors
journal, June 2015


Theoretical study of large proximity-induced s -wave-like pairing from a d -wave superconductor
journal, January 2016


Proximity-induced high-temperature superconductivity in the topological insulators Bi2Se3 and Bi2Te3
journal, January 2012

  • Zareapour, Parisa; Hayat, Alex; Zhao, Shu Yang F.
  • Nature Communications, Vol. 3, Issue 1
  • DOI: 10.1038/ncomms2042

Fully gapped topological surface states in Bi2Se3 films induced by a d-wave high-temperature superconductor
journal, September 2013

  • Wang, Eryin; Ding, Hao; Fedorov, Alexei V.
  • Nature Physics, Vol. 9, Issue 10
  • DOI: 10.1038/nphys2744

Spin-rotation symmetry breaking in the superconducting state of CuxBi2Se3
journal, May 2016

  • Matano, K.; Kriener, M.; Segawa, K.
  • Nature Physics, Vol. 12, Issue 9
  • DOI: 10.1038/nphys3781

Quasiparticle Evidence for the Nematic State above T c in Sr x Bi 2 Se 3
journal, July 2019


Superconductivity with two-fold symmetry in topological superconductor Sr x Bi2Se3
journal, January 2017

  • Du, Guan; Li, YuFeng; Schneeloch, J.
  • Science China Physics, Mechanics & Astronomy, Vol. 60, Issue 3
  • DOI: 10.1007/s11433-016-0499-x

Thermodynamic evidence for nematic superconductivity in CuxBi2Se3
journal, October 2016

  • Yonezawa, Shingo; Tajiri, Kengo; Nakata, Suguru
  • Nature Physics, Vol. 13, Issue 2
  • DOI: 10.1038/nphys3907

Odd-parity topological superconductor with nematic order: Application to Cu x Bi 2 Se 3
journal, September 2014


Large single crystal Bi-2212 along the c-axis prepared by floating zone method
journal, May 1993


Intrinsic Topological Insulator Bi2Te3 Thin Films on Si and Their Thickness Limit
journal, July 2010


Directly visualizing the sign change of d-wave superconducting gap in Bi2Sr2CaCu2O8+δ by phase-referenced quasiparticle interference
journal, April 2019


Vacuum tunneling spectroscopy and asymmetric density of states of Bi 2 Sr 2 CaCu 2 O 8 + δ
journal, April 1995


Microscopic electronic inhomogeneity in the high-Tc superconductor Bi2Sr2CaCu2O8+x
journal, September 2001

  • Pan, S. H.; O'Neal, J. P.; Badzey, R. L.
  • Nature, Vol. 413, Issue 6853
  • DOI: 10.1038/35095012

Direct Measurement of Quasiparticle-Lifetime Broadening in a Strong-Coupled Superconductor
journal, November 1978


Boundary Effects in Superconductors
journal, January 1964


Anisotropic Energy Gaps of Iron-Based Superconductivity from Intraband Quasiparticle Interference in LiFeAs
journal, May 2012


Scrutinizing the double superconducting gaps and strong coupling pairing in (Li1−xFex)OHFeSe
journal, January 2016

  • Du, Zengyi; Yang, Xiong; Lin, Hai
  • Nature Communications, Vol. 7, Issue 1
  • DOI: 10.1038/ncomms10565

Spectroscopic scanning tunneling microscopy insights into Fe-based superconductors
journal, November 2011


Experimental Demonstration of Topological Surface States Protected by Time-Reversal Symmetry
journal, December 2009


Quasiparticle interference on the surface of the topological insulator Bi 2 Te 3
journal, December 2009


Theory of quasiparticle scattering in a two-dimensional system of helical Dirac fermions: Surface band structure of a three-dimensional topological insulator
journal, December 2009

  • Zhou, Xiaoting; Fang, Chen; Tsai, Wei-Feng
  • Physical Review B, Vol. 80, Issue 24, Article No. 245317
  • DOI: 10.1103/PhysRevB.80.245317

Hexagonal Warping Effects in the Surface States of the Topological Insulator Bi 2 Te 3
journal, December 2009


Direct Observation of Broken Time-Reversal Symmetry on the Surface of a Magnetically Doped Topological Insulator
journal, May 2011


STM Imaging of Electronic Waves on the Surface of Bi2Te3: Topologically Protected Surface States and Hexagonal Warping Effects
journal, January 2010

  • Alpichshev, Zhanybek; Analytis, J. G.; Chu, J.-H.
  • Physical Review Letters, Vol. 104, Issue 1, Article No. 016401
  • DOI: 10.1103/PhysRevLett.104.016401

Angular dependence of the upper critical field of Bi 2.2 Sr 2 Ca 0.8 Cu 2 O 8 + δ
journal, September 1988


Imaging the impact on cuprate superconductivity of varying the interatomic distances within individual crystal unit cells
journal, February 2008

  • Slezak, J. A.; Lee, J.; Wang, M.
  • Proceedings of the National Academy of Sciences, Vol. 105, Issue 9
  • DOI: 10.1073/pnas.0706795105