Remote Mesoscopic Signatures of Induced Magnetic Texture in Graphene

Authors

• N. Arabchigavkani, University at Buffalo, The State University of New York
• R. Somphonsane, King Mongkut's Institute of Technology Ladkrabang
• H. Ramamoorthy, King Mongkut's Institute of Technology Ladkrabang
• G. He, University at Buffalo, The State University of New York
• J. Nathawat, University at Buffalo, The State University of New York
• S. Yin, University at Buffalo, The State University of New York
• B. Barut, University at Buffalo, The State University of New York
• K. He, University at Buffalo, The State University of New York
• M. D. Randle, University at Buffalo, The State University of New York
• R. Dixit, University at Buffalo, The State University of New York
• K. Sakanashi, Chiba University
• N. Aoki, Chiba University
• K. Zhang, University of Science and Technology of China
• L. Wang, University of Science and Technology of China
• W. N. Mei, University of Nebraska at OmahaFollow
• Peter Dowben, University of Nebraska - LincolnFollow
• J. Fransson, Uppsala Universitet
• J. P. Bird, University at Buffalo, The State University of New York

ORCID IDs

N. Arabchigavkani https://orcid.org/0000-0003-1459-1051

R. Somphonsane https://orcid.org/0000-0002-8344-1228

H. Ramamoorthy https://orcid.org/0000-0002-4282-2948

G. He https://orcid.org/0000-0001-8700-2487

J. Nathawat https://orcid.org/0000-0001-8520-2741

N. Aoki https://orcid.org/0000-0001-9203-6040

P. A. Dowben https://orcid.org/0000-0002-2198-4710

J. Fransson https://orcid.org/0000-0002-9217-2218

J. P. Bird https://orcid.org/0000-0002-6966-9007

Document Type

Article

Date of this Version

2-25-2021

Citation

PHYSICAL REVIEW LETTERS 126, 086802 (2021)

DOI: 10.1103/PhysRevLett.126.086802

Comments

© 2021 American Physical Society. Used by permission.

Abstract

Mesoscopic conductance fluctuations are a ubiquitous signature of phase-coherent transport in small conductors, exhibiting universal character independent of system details. In this Letter, however, we demonstrate a pronounced breakdown of this universality, due to the interplay of local and remote phenomena in transport. Our experiments are performed in a graphene-based interaction-detection geometry, in which an artificial magnetic texture is induced in the graphene layer by covering a portion of it with a micromagnet. When probing conduction at some distance from this region, the strong influence of remote factors is manifested through the appearance of giant conductance fluctuations, with amplitude much larger than e2/h. This violation of one of the fundamental tenets of mesoscopic physics dramatically demonstrates how local considerations can be overwhelmed by remote signatures in phase-coherent conductors.