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Zhao SYF, Poccia N, Panetta MG, Yu C, Johnson JW, Yoo H, Zhong R, Gu GD, Watanabe K, Taniguchi T, Postolova SV, Vinokur VM, Kim P. Sign-Reversing Hall Effect in Atomically Thin High-Temperature Bi_{2.1}Sr_{1.9}CaCu_{2.0}O_{8+δ} Superconductors. PHYSICAL REVIEW LETTERS 2019; 122:247001. [PMID: 31322397 DOI: 10.1103/physrevlett.122.247001] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 01/31/2019] [Indexed: 06/10/2023]
Abstract
We developed novel techniques to fabricate atomically thin Bi_{2.1}Sr_{1.9}CaCu_{2.0}O_{8+δ} van der Waals heterostructures down to two unit cells while maintaining a transition temperature T_{c} 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 R_{xy} as in the bulk system, spanning both below and above T_{c}. 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 R_{xy}(T,B) and the predictions of the vortex dynamics-based description of Hall effect in high-temperature superconductors both above and below T_{c}.
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Affiliation(s)
- S Y Frank Zhao
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Nicola Poccia
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Margaret G Panetta
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Cyndia Yu
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Jedediah W Johnson
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Hyobin Yoo
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Ruidan Zhong
- Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - G D Gu
- Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Kenji Watanabe
- National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan
| | - Takashi Taniguchi
- National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan
| | - Svetlana V Postolova
- Institute for Physics of Microstructures RAS, Nizhny Novgorod 603950, Russia
- Rzhanov Institute of Semiconductor Physics SB RAS, Novosibirsk 630090, Russia
| | - Valerii M Vinokur
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Consortium for Advanced Science and Engineering, Office of Research and National Laboratories, University of Chicago, Chicago, Illinois 60637, USA
| | - Philip Kim
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
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Truccato M, Agostino A, Borfecchia E, Mino L, Cara E, Pagliero A, Adhlakha N, Pascale L, Operti L, Enrico E, De Leo N, Fretto M, Martinez-Criado G, Lamberti C. Direct-Write X-ray Nanopatterning: A Proof of Concept Josephson Device on Bi2Sr2CaCu2O8+δ Superconducting Oxide. NANO LETTERS 2016; 16:1669-1674. [PMID: 26814601 DOI: 10.1021/acs.nanolett.5b04568] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We describe the first use of a novel photoresist-free X-ray nanopatterning technique to fabricate an electronic device. We have produced a proof-of-concept device consisting of a few Josephson junctions by irradiating microcrystals of the Bi2Sr2CaCu2O8+δ (Bi-2212) superconducting oxide with a 17.6 keV synchrotron nanobeam. Fully functional devices have been obtained by locally turning the material into a nonsuperconducting state by means of hard X-ray exposure. Nano-XRD patterns reveal that the crystallinity is substantially preserved in the irradiated areas that there is no evidence of macroscopic crystal disruption. Indications are that O ions have been removed from the crystals, which could make this technique interesting also for other oxide materials. Direct-write X-ray nanopatterning represents a promising fabrication method exploiting material/material rather than vacuum/material interfaces, with the potential for nanometric resolution, improved mechanical stability, enhanced depth of patterning, and absence of chemical contamination with respect to traditional lithographic techniques.
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Affiliation(s)
- Marco Truccato
- Department of Physics, Interdepartmental Centre NIS, University of Torino , via Giuria 1, I-10125 Torino, Italy
| | - Angelo Agostino
- Department of Chemistry, Interdepartmental Centre NIS and INSTM Centro di Riferimento, University of Torino , via Giuria 7, I-10125 Torino, Italy
| | - Elisa Borfecchia
- Department of Chemistry, Interdepartmental Centre NIS and INSTM Centro di Riferimento, University of Torino , via Giuria 7, I-10125 Torino, Italy
| | - Lorenzo Mino
- INRIM, National Institute for Metrological Research , Strada delle Cacce 91, I-10135 Torino, Italy
| | - Eleonora Cara
- Department of Physics, Interdepartmental Centre NIS, University of Torino , via Giuria 1, I-10125 Torino, Italy
| | - Alessandro Pagliero
- Department of Physics, Interdepartmental Centre NIS, University of Torino , via Giuria 1, I-10125 Torino, Italy
| | - Nidhi Adhlakha
- Department of Physics, Interdepartmental Centre NIS, University of Torino , via Giuria 1, I-10125 Torino, Italy
| | - Lise Pascale
- Department of Chemistry, Interdepartmental Centre NIS and INSTM Centro di Riferimento, University of Torino , via Giuria 7, I-10125 Torino, Italy
| | - Lorenza Operti
- Department of Chemistry, Interdepartmental Centre NIS and INSTM Centro di Riferimento, University of Torino , via Giuria 7, I-10125 Torino, Italy
| | - Emanuele Enrico
- INRIM, National Institute for Metrological Research , Strada delle Cacce 91, I-10135 Torino, Italy
| | - Natascia De Leo
- INRIM, National Institute for Metrological Research , Strada delle Cacce 91, I-10135 Torino, Italy
| | - Matteo Fretto
- INRIM, National Institute for Metrological Research , Strada delle Cacce 91, I-10135 Torino, Italy
| | - Gema Martinez-Criado
- Experiments Division, European Synchrotron Radiation Facility , 71 Avenue des Martyrs, 38000 Grenoble, France
| | - Carlo Lamberti
- Department of Chemistry, Interdepartmental Centre NIS and INSTM Centro di Riferimento, University of Torino , via Giuria 7, I-10125 Torino, Italy
- Southern Federal University , Zorge Street 5, 344090 Rostov-on-Don, Russia
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Carballeira C, Mosqueira J, Revcolevschi A, Vidal F. First observation for a cuprate superconductor of fluctuation-induced diamagnetism well inside the finite-magnetic-field regime. PHYSICAL REVIEW LETTERS 2000; 84:3157-3160. [PMID: 11019036 DOI: 10.1103/physrevlett.84.3157] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/1999] [Indexed: 05/23/2023]
Abstract
For the first time for a cuprate superconductor, measurements performed above T(c) in high quality grain aligned La1.9Sr0.1CuO4 samples have allowed the observation of the thermal fluctuation induced diamagnetism well inside the finite-magnetic-field fluctuation regime. These results may be explained in terms of the Gaussian Ginzburg-Landau approach for layered superconductors, but only if the finite field contributions are estimated by taking off the short-wavelength fluctuations.
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Affiliation(s)
- C Carballeira
- LBTS, Departamento de Fisica da Materia Condensada, Universidade de Santiago de Compostela, E-15706 Santiago de Compostela, Spain
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Hudson EW, Pan SH, Gupta AK, Ng K, Davis JC. Atomic-scale quasi-particle scattering resonances in Bi2Sr2CaCu2O8+delta. Science 1999; 285:88-91. [PMID: 10390368 DOI: 10.1126/science.285.5424.88] [Citation(s) in RCA: 195] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Low-temperature scanning tunneling spectroscopy of the high transition temperature (high-Tc) cuprate Bi2Sr2CaCu2O8+delta reveals the existence of large numbers of identical regions with diameters of about 3 nanometers that have a relatively high density of low-energy quasi-particle states. Their spatial and spectroscopic characteristics are consistent with theories of strong quasi-particle scattering from atomic-scale impurities in a d-wave superconductor. These characteristics include breaking of local particle-hole symmetry, a diameter near twice the superconducting coherence length, and an inverse square dependence of their local density-of-states on distance from the scattering center. In addition to the validation of d-wave quasi-particle scattering theories, these observations identify a source for the anomalously high levels of low-energy quasi-particles in Bi2Sr2CaCu2O8+delta at low temperatures.
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Affiliation(s)
- EW Hudson
- Department of Physics, University of California, Berkeley, CA, 94720-7300, USA. Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506-0055, USA
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