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Title: An on/off Berry phase switch in circular graphene resonators

Journal Article · · Science
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [4]; ORCiD logo [6];  [6];  [7]; ORCiD logo [4]; ORCiD logo [4]
  1. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); Univ. of Maryland, College Park, MD (United States)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Harvard Univ., Cambridge, MA (United States)
  3. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); Univ. of Maryland, College Park, MD (United States); South Univ. of Science and Technology of China, Shenzhen (China)
  4. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
  5. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); Ecole Polytechnique Federale Lausanne (Switzlerland)
  6. National Inst. for Materials Science (NIMS), Tsukuba (Japan)
  7. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

The phase of a quantum state may not return to its original value after the system's parameters cycle around a closed path; instead, the wavefunction may acquire a measurable phase difference called the Berry phase. Berry phases typically have been accessed through interference experiments. Here, we demonstrate an unusual Berry-phase-induced spectroscopic feature: a sudden and large increase in the energy of angular-momentum states in circular graphene p-n junction resonators when a small critical magnetic field is reached. This behavior results from turning on a π-Berry phase associated with the topological properties of Dirac fermions in graphene. The Berry phase can be switched on and off with small magnetic field changes on the order of 10 mT, potentially enabling a variety of optoelectronic graphene device applications.

Research Organization:
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0001088
OSTI ID:
1463266
Journal Information:
Science, Vol. 356, Issue 6340; ISSN 0036-8075
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 81 works
Citation information provided by
Web of Science

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Cited By (41)

Spin interferometry in anisotropic spin-orbit fields journal March 2018
Tuning Anti-Klein to Klein Tunneling in Bilayer Graphene journal September 2018
WSe 2 homojunctions and quantum dots created by patterned hydrogenation of epitaxial graphene substrates journal January 2019
US–Czech conference strengthens bilateral and multidisciplinary collaborations in nanotechnology and chemistry journal December 2018
Persistent and reversible electrostatic control of doping in graphene/hexagonal boron nitride heterostructures journal January 2020
Nontrivial quantum oscillation geometric phase shift in a trivial band journal October 2019
Accessing ratios of quantized resistances in graphene pn junction devices using multiple terminals journal February 2020
Geometry-Assisted Topological Transitions in Spin Interferometry journal December 2019
Tunneling Spectra of a Quasifreestanding Graphene Monolayer journal May 2018
Tuning anti-Klein to Klein tunneling in bilayer graphene text January 2017
Two-dimensional halogen-bonded organic frameworks based on the tetrabromobenzene-1,4-dicarboxylic acid building molecule journal January 2020
Confined states in graphene quantum blisters journal August 2018
Effective medium theory for electron waves in a gate-defined quantum dot array in graphene journal July 2019
Atomic‐Scale Manipulation and In Situ Characterization with Scanning Tunneling Microscopy journal October 2019
Quantum transport in graphene p n junctions with moiré superlattice modulation journal July 2018
Anomalous chiral edge states in spin-1 Dirac quantum dots journal January 2020
Zero‐Energy Vortices in Dirac Materials journal March 2019
Graphene quantum blisters: A tunable system to confine charge carriers journal May 2018
Organometallic complexes of carbon nanotori journal July 2019
Nanoscale imaging of equilibrium quantum Hall edge currents and of the magnetic monopole response in graphene journal December 2019
Nanoscale detection of valley-dependent spin splitting around atomic defects of graphene journal June 2019
Interaction-driven quantum Hall wedding cake–like structures in graphene quantum dots journal August 2018
Electrical confinement in a spectrum of two-dimensional Dirac materials with classically integrable, mixed, and chaotic dynamics journal February 2020
Oscillations of the bandgap with size in armchair and zigzag graphene quantum dots journal May 2019
Helical level structure of Dirac potential wells journal November 2017
Tuning a circular p–n junction in graphene from quantum confinement to optical guiding journal September 2017
Tuning Anti-Klein to Klein Tunneling in Bilayer Graphene text January 2018
Mask aligner for ultrahigh vacuum with capacitive distance control journal April 2018
Tuning single-electron charging and interactions between compressible Landau level islands in graphene journal January 2020
Tuning anti-Klein to Klein tunneling in bilayer graphene text January 2017
Tuning a Circular p-n Junction in Graphene from Quantum Confinement to Optical Guiding text January 2017
Spin interferometry in anisotropic spin-orbit fields text January 2017
Graphene quantum blisters: a tunable system to confine charge carriers text January 2018
Confined states in graphene quantum blisters text January 2018
Non-trivial quantum oscillation geometric phase shift in a trivial band text January 2019
Geometry-assisted topological transitions in spin interferometry text January 2019
Nanoscale imaging of equilibrium quantum Hall edge currents and of the magnetic monopole response in graphene text January 2019
Relativistic Artificial Molecules Realized by Two Coupled Graphene Quantum Dots journal July 2020
Relativistic Artificial Molecules Realized by Two Coupled Graphene Quantum Dots preprint January 2019
Breaking whispering-gallery modes of massless Dirac fermions in graphene quantum dots by Coulomb interaction text January 2020
Graphene whisperitronics: transducing whispering gallery modes into electronic transport text January 2021

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