Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Infrared nano-imaging of Dirac magnetoexcitons in graphene

Journal Article · · Nature Nanotechnology
 [1];  [2];  [2];  [3];  [4];  [1];  [2];  [2];  [4];  [4];  [4];  [5];  [4];  [4];  [6];  [2];  [2];  [7];  [8];  [9] more »;  [5];  [10];  [4];  [2];  [3] « less
  1. Stony Brook University, NY (United States); Columbia University, New York, NY (United States)
  2. Stony Brook University, NY (United States)
  3. Stony Brook University, NY (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
  4. Columbia University, New York, NY (United States)
  5. Université de Genève (Switzerland)
  6. Stony Brook University, NY (United States); University of California, Berkeley, CA (United States)
  7. Yale University, New Haven, CT (United States)
  8. Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
  9. Stony Brook University, NY (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
  10. University of California at San Diego, La Jolla, CA (United States)
Magnetic fields can have profound effects on the motion of electrons in quantum materials. Two-dimensional electron systems subject to strong magnetic fields are expected to exhibit quantized Hall conductivity, chiral edge currents and distinctive collective modes referred to as magnetoplasmons and magnetoexcitons. Generating these propagating collective modes in charge-neutral samples and imaging them at their native nanometre length scales have thus far been experimentally elusive. Here we visualize propagating magnetoexciton polaritons at their native length scales and report their magnetic-field-tunable dispersion in near-charge-neutral graphene. Imaging these collective modes and their associated nano-electro-optical responses allows us to identify polariton-modulated optical and photo-thermal electric effects at the sample edges, which are the most pronounced near charge neutrality. Our work is enabled by innovations in cryogenic near-field optical microscopy techniques that allow for the nano-imaging of the near-field responses of two-dimensional materials under magnetic fields up to 7 T. In conclusion, this nano-magneto-optics approach allows us to explore and manipulate magnetopolaritons in specimens with low carrier doping via harnessing high magnetic fields.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
National Science Foundation (NSF); Swiss National Science Foundation (SNSF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)
Grant/Contract Number:
SC0012704; SC0019443
OSTI ID:
2204612
Report Number(s):
BNL--224960-2023-JAAM
Journal Information:
Nature Nanotechnology, Journal Name: Nature Nanotechnology Vol. 18; ISSN 1748-3387
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

References (58)

Modern Scattering‐Type Scanning Near‐Field Optical Microscopy for Advanced Material Research journal April 2019
Enhanced dielectric contrast in scattering-type scanning near-field optical microscopy journal August 2000
The role of contact resistance in graphene field-effect devices journal August 2017
Moiré Band Topology in Twisted Bilayer Graphene journal July 2020
Gate-Tunable Proximity Effects in Graphene on Layered Magnetic Insulators journal October 2022
Edge and Surface Plasmons in Graphene Nanoribbons journal November 2015
Nano-photocurrent Mapping of Local Electronic Structure in Twisted Bilayer Graphene journal February 2020
Probes for Ultrasensitive THz Nanoscopy journal April 2019
Infrared Nanoscopy of Dirac Plasmons at the Graphene–SiO 2 Interface journal October 2011
Infrared Spectroscopy of Tunable Dirac Terahertz Magneto-Plasmons in Graphene journal June 2012
Photo-Thermoelectric Effect at a Graphene Interface Junction journal February 2010
Gate-tuning of graphene plasmons revealed by infrared nano-imaging journal June 2012
Near-field photocurrent nanoscopy on bare and encapsulated graphene journal February 2016
Electrically controlled terahertz magneto-optical phenomena in continuous and patterned graphene journal March 2017
Thermoelectric detection and imaging of propagating graphene plasmons journal September 2016
Acoustic terahertz graphene plasmons revealed by photocurrent nanoscopy journal October 2016
Giant Faraday rotation in single- and multilayer graphene journal November 2010
Photo-Nernst current in graphene journal November 2015
Chiral magnetic effect in ZrTe5 journal February 2016
Nanotextured phase coexistence in the correlated insulator V2O3 journal September 2016
Imaging the nanoscale phase separation in vanadium dioxide thin films at terahertz frequencies journal September 2018
Cleaning interfaces in layered materials heterostructures journal December 2018
Hyperbolic enhancement of photocurrent patterns in minimally twisted bilayer graphene journal March 2021
Terahertz response of monolayer and few-layer WTe2 at the nanoscale journal September 2021
Colossal infrared and terahertz magneto-optical activity in a two-dimensional Dirac material journal July 2019
Coexisting first- and second-order electronic phase transitions in a correlated oxide journal July 2018
Correlated Hofstadter spectrum and flavour phase diagram in magic-angle twisted bilayer graphene journal April 2022
Strongly correlated electron–photon systems journal May 2022
Giant magnetoresistance of Dirac plasma in high-mobility graphene journal April 2023
Interband plasmon polaritons in magnetized charge-neutral graphene journal May 2021
Scattering-type scanning near-field optical microscopy with Akiyama piezo-probes journal January 2022
A sub-2 Kelvin cryogenic magneto-terahertz scattering-type scanning near-field optical microscope (cm-THz-sSNOM) journal April 2023
Nonlinear nanoelectrodynamics of a Weyl metal journal November 2021
Edge magnetoplasmons in graphene journal February 2014
Magneto-optical conductivity in graphene journal December 2006
Near-field microscopy by elastic light scattering from a tip
  • Keilmann, Fritz; Hillenbrand, Rainer
  • Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, Vol. 362, Issue 1817 https://doi.org/10.1098/rsta.2003.1347
journal April 2004
Magnetodispersion of two-dimensional plasmon polaritons journal November 2021
Excitations from a filled Landau level in the two-dimensional electron gas journal November 1984
Electronic properties of disordered two-dimensional carbon journal March 2006
Excitations from filled Landau levels in graphene journal March 2007
Thermopower and Nernst effect in graphene in a magnetic field journal August 2009
Many-body corrections to cyclotron resonance in monolayer and bilayer graphene journal February 2010
Multicomponent magneto-optical conductivity of multilayer graphene on SiC journal July 2011
Edge magnetoplasmons and the optical excitations in graphene disks journal September 2012
Giant photocurrents in a Dirac fermion system at cyclotron resonance journal June 2013
Approaching the Dirac Point in High-Mobility Multilayer Epitaxial Graphene journal December 2008
Anomalous Thermoelectric Transport of Dirac Particles in Graphene journal April 2009
Interaction-Induced Shift of the Cyclotron Resonance of Graphene Using Infrared Spectroscopy journal February 2010
Landau Level Spectroscopy of Ultrathin Graphite Layers journal December 2006
Infrared Spectroscopy of Landau Levels of Graphene journal May 2007
Electronic properties of graphene in a strong magnetic field journal November 2011
Electron-Electron Interactions in Graphene: Current Status and Perspectives journal July 2012
Mott Transition in VO2 Revealed by Infrared Spectroscopy and Nano-Imaging journal December 2007
One-Dimensional Electrical Contact to a Two-Dimensional Material journal October 2013
Photonic crystals for nano-light in moiré graphene superlattices journal December 2018
Influence of Landau level mixing on the properties of elementary excitations in graphene in strong magnetic field journal February 2012
Magneto-plasmonics in graphene-dielectric sandwich journal September 2014
Rapid simulations of hyperspectral near-field images of three-dimensional heterogeneous surfaces – part II journal March 2022

Similar Records

Landau-phonon polaritons in Dirac heterostructures
Journal Article · Thu Sep 12 20:00:00 EDT 2024 · Science Advances · OSTI ID:2473072

Magnetic field driven emergent phenomena: Insights from magneto-optics and nanoscopy
Journal Article · Thu Sep 11 20:00:00 EDT 2025 · Progress in Quantum Electronics · OSTI ID:2589351

Accelerated Nano-Optical Imaging through Sparse Sampling
Journal Article · Wed Feb 07 19:00:00 EST 2024 · Nano Letters · OSTI ID:2472848