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

Band Engineering of Large-Twist-Angle Graphene/h-BN Moiré Superlattices with Pressure

Journal Article · · Physical Review Letters
 [1];  [2];  [3];  [4];  [5];  [6];  [3];  [7];  [4]
  1. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Zhejiang Univ., Hangzhou (China)
  2. Zhejiang Univ. of Technology, Hangzhou (China)
  3. Univ. of California, Berkeley, CA (United States)
  4. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  5. National Institute for Materials Science (NIMS), Tsukuba (Japan). Research Center for Functional Materials
  6. National Institute for Materials Science (NIMS), Tsukuba (Japan). International Center for Materials Nanoarchitectonics
  7. Tsinghua Univ., Bejing (China). State Key Lab. of Low-Dimensional Quantum Physics and Frontier Science Center for Quantum Information

Graphene interfacing hexagonal boron nitride (h-BN) forms lateral moiré superlattices that host a wide range of new physical effects such as the creation of secondary Dirac points and band gap opening. A delicate control of the twist angle between the two layers is required as the effects weaken or disappear at large twist angles. In this Letter, we show that these effects can be reinstated in large-angle (~1.8°) graphene/h-BN moiré superlattices under high pressures. Additionally, a graphene/h-BN moiré superlattice microdevice is fabricated directly on the diamond culet of a diamond anvil cell, where pressure up to 8.3 GPa is applied. The band gap at the primary Dirac point is opened by 40-60 meV, and fingerprints of the second Dirac band gap are also observed in the valence band. Theoretical calculations confirm the band engineering with pressure in large-angle graphene/h-BN bilayers.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); National Natural Science Foundation of China (NSFC); National Key R&D Program of China; JSPS KAKENHI; CREST; MEXT
Grant/Contract Number:
AC02-05CH11231; NA0003842
OSTI ID:
1823400
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 22 Vol. 125; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (56)

Moiré superlattice effects in graphene/boron-nitride van der Waals heterostructures: Moiré superlattice effects in graphene/boron-nitride van der Waals heterostructures journal April 2015
Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set journal July 1996
Interlayer Coupling Affected Structural Stability in Ultrathin MoS 2 : An Investigation by High Pressure Raman Spectroscopy journal October 2016
van der Waals Heterostructures with High Accuracy Rotational Alignment journal February 2016
Pressurizing Field-Effect Transistors of Few-Layer MoS 2 in a Diamond Anvil Cell journal December 2016
Raman Fingerprint of Aligned Graphene/h-BN Superlattices journal October 2013
Hofstadter’s butterfly and the fractal quantum Hall effect in moiré superlattices journal May 2013
Cloning of Dirac fermions in graphene superlattices journal May 2013
Van der Waals heterostructures journal July 2013
Correlated insulator behaviour at half-filling in magic-angle graphene superlattices journal March 2018
Unconventional superconductivity in magic-angle graphene superlattices journal March 2018
Macroscopic self-reorientation of interacting two-dimensional crystals journal March 2016
Pressure-induced commensurate stacking of graphene on boron nitride journal October 2016
Observation of an intrinsic bandgap and Landau level renormalization in graphene/boron-nitride heterostructures journal July 2014
Origin of band gaps in graphene on hexagonal boron nitride journal February 2015
Boron nitride substrates for high-quality graphene electronics journal August 2010
Ultrafast charge transfer in atomically thin MoS2/WS2 heterostructures journal August 2014
Emergence of superlattice Dirac points in graphene on hexagonal boron nitride journal March 2012
Commensurate–incommensurate transition in graphene on hexagonal boron nitride journal April 2014
Gaps induced by inversion symmetry breaking and second-generation Dirac cones in graphene/hexagonal boron nitride journal August 2016
Switching 2D magnetic states via pressure tuning of layer stacking journal October 2019
Even-denominator fractional quantum Hall states at an isospin transition in monolayer graphene journal July 2018
Dynamic band-structure tuning of graphene moiré superlattices with pressure journal May 2018
Signatures of moiré-trapped valley excitons in MoSe2/WSe2 heterobilayers journal February 2019
Evidence for moiré excitons in van der Waals heterostructures journal February 2019
Observation of moiré excitons in WSe2/WS2 heterostructure superlattices journal February 2019
Tunable correlated states and spin-polarized phases in twisted bilayer–bilayer graphene journal May 2020
van der Waals heterostructures combining graphene and hexagonal boron nitride journal January 2019
The ruby pressure standard to 150GPa journal December 2005
A cubic boron nitride gasket for diamond-anvil experiments journal May 2008
Pressure and temperature-dependent Raman spectra of MoS2 film journal December 2016
Tunable moiré bands and strong correlations in small-twist-angle bilayer graphene journal March 2017
Large bandgap of pressurized trilayer graphene journal April 2019
Effective lattice model of graphene moiré superlattices on hexagonal boron nitride journal November 2019
Pressure-induced gap modulation and topological transitions in twisted bilayer and twisted double bilayer graphene journal April 2020
Special points for Brillouin-zone integrations journal June 1976
Self-interaction correction to density-functional approximations for many-electron systems journal May 1981
High-pressure Raman spectroscopy in the layered materials 2 H -Mo S 2 , 2 H -Mo Se 2 , and 2 H -Mo Te 2 journal December 1982
Projector augmented-wave method journal December 1994
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
Resonant Raman scattering at exciton states tuned by pressure and temperature in 2 H -MoS 2 journal May 2010
Bending modes, anharmonic effects, and thermal expansion coefficient in single-layer and multilayer graphene journal October 2012
Generic miniband structure of graphene on a hexagonal substrate journal June 2013
Ab initio theory of moiré superlattice bands in layered two-dimensional materials journal May 2014
Transport and particle-hole asymmetry in graphene on boron nitride journal June 2015
van der Waals bilayer energetics: Generalized stacking-fault energy of graphene, boron nitride, and graphene/boron nitride bilayers journal October 2015
Moiré band model and band gaps of graphene on hexagonal boron nitride journal August 2017
K-Λ crossover transition in the conduction band of monolayer MoS 2 under hydrostatic pressure journal November 2017
Massive Dirac Fermions and Hofstadter Butterfly in a van der Waals Heterostructure journal May 2013
One-Dimensional Electrical Contact to a Two-Dimensional Material journal October 2013
2D materials and van der Waals heterostructures journal July 2016
Evidence for a fractional fractal quantum Hall effect in graphene superlattices journal December 2015
Twistable electronics with dynamically rotatable heterostructures journal August 2018
Tuning superconductivity in twisted bilayer graphene journal January 2019
Solidification of High-Pressure Medium Daphne 7373 journal June 2007

Similar Records

Tunable angle-dependent electrochemistry at twisted bilayer graphene with moiré flat bands
Journal Article · Wed Feb 16 23:00:00 EST 2022 · Nature Chemistry · OSTI ID:1877557

Anisotropic moiré optical transitions in twisted monolayer/bilayer phosphorene heterostructures
Journal Article · Thu Jun 24 00:00:00 EDT 2021 · Nature Communications · OSTI ID:1815927