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Title: Sign-Reversing Hall Effect in Atomically Thin High-Temperature Bi 2.1 Sr 1.9 CaCu 2.0 O 8 + δ Superconductors [Sign-Reversing Hall Effect in Atomically Thin High Temperature Superconductors]

Journal Article · · Physical Review Letters
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  1. Harvard Univ., Cambridge, MA (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. National Institute for Materials Science, Ibaraki (Japan)
  4. Institute for Physics of Microstructures RAS, Nizhny Novgorod (Russia); Rzhanov Institute of Semiconductor Physics SB RAS, Novosibirsk (Russia)
  5. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Chicago, Chicago, IL (United States)

We developed novel techniques to fabricate atomically thin Bi2.1Sr1.9CaCu2.0O8+δ van der Waals heterostructures down to two unit cells while maintaining a transition temperature Tc close to the bulk, and carry out magnetotransport measurements on these van der Waals devices. We find a double sign change of the Hall resistance E-xy as in the bulk system, spanning both below and above Tc . Further, we observe a drastic enlargement of the region of sign reversal in the temperature-magnetic field phase diagram with decreasing thickness of the device. We obtain quantitative agreement between experimental Rxy (T, B) and the predictions of the vortex dynamics-based description of Hall effect in high-temperature superconductors both above and below Tc .

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Gordon and Betty Moore Foundation; National Science Foundation (NSF); Natural Sciences and Engineering Research Council of Canada (NSERC); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Grant/Contract Number:
SC0012704; AC02-06CH11357
OSTI ID:
1557711
Alternate ID(s):
OSTI ID: 1543282; OSTI ID: 1546407
Report Number(s):
BNL-211946-2019-JAAM; PRLTAO
Journal Information:
Physical Review Letters, Vol. 122, Issue 24; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 42 works
Citation information provided by
Web of Science

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Cited By (1)

High-temperature superconductivity in monolayer Bi2Sr2CaCu2O8+δ journal October 2019

Figures / Tables (11)