Fernandes, G. E.

Hollen, Shawna M.

Joy, J C

Valles, J M, Jr.

Xu, J M

Zhang, X

Zhao, C

English

University of New Hampshire

University of New Hampshire
University of New Hampshire Scholars' Repository
Physics Scholarship Physics
3-2014
Evolution of the Cooper Pair Insulator Phase in a-Bi
Films Grown on Nanohoneycomb Substrates with
Varying Surface Topography
J C. Joy
Brown University
X Zhang
Brown University
C Zhao
Brown University
Shawna M. Hollen
University of New Hampshire - Main Campus
J M. Valles Jr.
Brown University
See next page for additional authors
Follow this and additional works at: https://scholars.unh.edu/physics_facpub
Part of the Physics Commons
This Conference Proceeding is brought to you for free and open access by the Physics at University of New Hampshire Scholars' Repository. It has been
accepted for inclusion in Physics Scholarship by an authorized administrator of University of New Hampshire Scholars' Repository. For more
information, please contact nicole.hentz@unh.edu.
Recommended Citation
http://meetings.aps.org/link/BAPS.2014.MAR.A52.5
Authors
J C. Joy, X Zhang, C Zhao, Shawna M. Hollen, J M. Valles Jr., G. E. Fernandes, and J M. Xu
This conference proceeding is available at University of New Hampshire Scholars' Repository: https://scholars.unh.edu/
physics_facpub/425
Abstract Submitted
for the MAR14 Meeting of
The American Physical Society
Evolution of the Cooper Pair Insulator Phase in a-Bi Films
Grown on Nanohoneycomb Substrates with Varying Surface Topography
J.C. JOY, X. ZHANG, C. ZHAO1, S.M. HOLLEN2, J.M. VALLES, JR., Brown
University Department of Physics, G. FERNANDES, J.M. XU, Brown University
Division of Engineering — The Cooper Pair Insulator (CPI) phase has been observed
in a variety of systems close to both the disorder and field tuned Superconductor
to Insulator Transition (SIT) in two dimensions. A number of recent experimental
and theoretical studies suggest that the CPI phase arises due to inhomogeneities
in the superconducting coupling constant on the nanoscale. Anodized Aluminum
Oxide (AAO) substrates provide a convenient experimental platform for studying
the influence of inhomogeneity on the CPI state, as the substrates exhibit both a
nanohoneycomb structure which allows flux periodic behavior to be measured, as
well as a controllable morphology which permits control of the level of inhomogene-
ity present. We will discuss recent experiments and analyses which examine the
behavior of the CPI phase as the level of inhomogeneity in the films is reduced. We
will also examine the potential implications of this work in understanding the extent
of the CPI phase in two-dimensional systems. This work was supported by the NSF
through grants No. DMR-1307290 and DMR-0907357 and by the AFRL, the ONR,
and the AFOSR.
1Currently at Northwestern Polytechnical University, Xian, China
2Currently at Ohio State University
James Joy
Brown University Department of Physics
Date submitted: 14 Nov 2013 Electronic form version 1.4


Evolution of the Cooper Pair Insulator Phase in a-Bi Films Grown on Nanohoneycomb Substrates with Varying Surface Topography

UNH Scholars' Repository

University of New HampshireUniversity of New Hampshire Scholars' RepositoryPhysics Scholarship Physics3-2014Evolution of the Cooper Pair Insulator Phase in a-BiFilms Grown on Nanohoneycomb Substrates withVarying Surface TopographyJ C. JoyBrown UniversityX ZhangBrown UniversityC ZhaoBrown UniversityShawna M. HollenUniversity of New Hampshire - Main CampusJ M. Valles Jr.Brown UniversitySee next page for additional authorsFollow this and additional works at: https://scholars.unh.edu/physics_facpubPart of the Physics CommonsThis Conference Proceeding is brought to you for free and open access by the Physics at University of New Hampshire Scholars' Repository. It has beenaccepted for inclusion in Physics Scholarship by an authorized administrator of University of New Hampshire Scholars' Repository. For moreinformation, please contact nicole.hentz@unh.edu.Recommended Citationhttp://meetings.aps.org/link/BAPS.2014.MAR.A52.5AuthorsJ C. Joy, X Zhang, C Zhao, Shawna M. Hollen, J M. Valles Jr., G. E. Fernandes, and J M. XuThis conference proceeding is available at University of New Hampshire Scholars' Repository: https://scholars.unh.edu/physics_facpub/425Abstract Submittedfor the MAR14 Meeting ofThe American Physical SocietyEvolution of the Cooper Pair Insulator Phase in a-Bi FilmsGrown on Nanohoneycomb Substrates with Varying Surface TopographyJ.C. JOY, X. ZHANG, C. ZHAO1, S.M. HOLLEN2, J.M. VALLES, JR., BrownUniversity Department of Physics, G. FERNANDES, J.M. XU, Brown UniversityDivision of Engineering | The Cooper Pair Insulator (CPI) phase has been observedin a variety of systems close to both the disorder and eld tuned Superconductorto Insulator Transition (SIT) in two dimensions. A number of recent experimentaland theoretical studies suggest that the CPI phase arises due to inhomogeneitiesin the superconducting coupling constant on the nanoscale. Anodized AluminumOxide (AAO) substrates provide a convenient experimental platform for studyingthe inuence of inhomogeneity on the CPI state, as the substrates exhibit both ananohoneycomb structure which allows ux periodic behavior to be measured, aswell as a controllable morphology which permits control of the level of inhomogene-ity present. We will discuss recent experiments and analyses which examine thebehavior of the CPI phase as the level of inhomogeneity in the lms is reduced. Wewill also examine the potential implications of this work in understanding the extentof the CPI phase in two-dimensional systems. This work was supported by the NSFthrough grants No. DMR-1307290 and DMR-0907357 and by the AFRL, the ONR,and the AFOSR.1Currently at Northwestern Polytechnical University, Xian, China2Currently at Ohio State UniversityJames JoyBrown University Department of PhysicsDate submitted: 14 Nov 2013 Electronic form version 1.4

https://scholars.unh.edu/cgi/viewcontent.cgi?article=1424&amp;context=physics_facpub

Evolution of the Cooper Pair Insulator Phase in a-Bi Films Grown on Nanohoneycomb Substrates with Varying Surface Topography

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