Clean 2D superconductivity in a bulk van der Waals superlattice

Devarakonda, A.; Inoue, H.; Fang, S.; Ozsoy-Keskinbora, C.; Suzuki, T.; Kriener, M.; Fu, L.; Kaxiras, E.; Bell, D. C.; Checkelsky, J. G.

doi:10.1126/science.aaz6643

Clean 2D superconductivity in a bulk van der Waals superlattice

Journal Article · Fri Oct 09 04:00:00 EDT 2020 · Science

DOI:https://doi.org/10.1126/science.aaz6643· OSTI ID:1852724

^[1]; Inoue, H. ^[2]; ^[3]; Ozsoy-Keskinbora, C. ^[4]; ^[2]; ^[5]; ^[2]; ^[6]; ^[7]; ^[2]

Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.; OSTI
Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
Department of Physics, Harvard University, Cambridge, MA 02138, USA.
John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan.
Department of Physics, Harvard University, Cambridge, MA 02138, USA.; John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.; Center for Nanoscale Systems, Harvard University, Cambridge, MA 02138, USA.

Alternative route to a 2D superconductor

Single layers of transition metal dichalcogenides exhibit exotic properties, including superconductivity. The usual route to obtaining such samples is to exfoliate a three-dimensional (3D) crystal. Devarakondaet al.instead grew a superlattice comprising alternating layers of the transition metal dichalcogenide hexagonal NbS₂and the material Ba₃NbS₅(see the Perspective by Schoop). The inert Ba₃NbS₅layers serve to dissociate the superconducting NbS₂layers from one another, resulting in 2D superconductivity with high carrier mobility. The combination of high mobility and reduced dimensionality may give rise to exotic quantum phases.

Science, this issue p.231see also p.170

Research Organization:: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Harvard Univ., Cambridge, MA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

DOE Contract Number:: SC0018945; SC0019300

OSTI ID:: 1852724

Journal Information:: Science, Journal Name: Science Journal Issue: 6513 Vol. 370; ISSN 0036-8075

Publisher:: AAAS

Country of Publication:: United States

Language:: English

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