The electronic properties of the resultant heterostructures vary strongly. Monolayer graphene and hexagonal boron nitride hbn are two representative 2d crystals possessing similar atomic arrangements and lattice constants, but with completely different electronic properties. This encapsulation resulted in an additional improvement. Lattice relaxation at the interface of twodimensional. Electronic properties of graphene encapsulated with different two. Twodimensional 2d monolayer materials, such as graphene and hexagonal bn hbn, hold great promise for a variety of applications because of their extraordinary mechanical and electronic properties 3,4. Electronic properties of graphene heterostructures with hexagonal crystals john robert wallbank phd thesis submitted for the degree of doctor of philosophy. To robi, because i still laugh of the ebook reader reading pdfs in loud voice. In several experimental preparations of graphenehbn, the lattice constants of graphene and hbn had a 1. High temperature quantum transport in graphenehexagonal. Graphene is therefore an exciting bridge between condensedmatter and highenergy physics, and the research on its electronic properties unites scientists with various thematic backgrounds. The first material to be included was graphene, a zerooverlap semimetal. Here we report on our search for alternative substrates. In this work, we demonstrate fieldeffect transistors fets with.
Graphene and borophenegraphene heterostructures on ag111. H fourier transformation of the image in e, displaying only one. The apparent solution is to protect both sides of the graphene layer from the environment by sandwiching the graphene between two hexagonal boron nitride crystals 38, as shown in fig. When atoms are placed onto the graphene hexagonal lattice, the overlap between the p z. Pdf electronic properties of engineering materials. Tunable crystal symmetry in grapheneboron nitride heterostructures with. Introduction to the physical properties of graphene. For application in electronics, materials with high carrier mobility are. Use features like bookmarks, note taking and highlighting while reading electronic properties of graphene heterostructures with hexagonal crystals springer theses. It is possible to chemically functionalise the diamond surface, and in the present case h, f, o, and ngroup have been purposefully added prior to graphene deposition. Merging two or more monolayer materials with distinct physical properties into a lateral heterostructure can offer another dimensionality for engineering the. Electronic properties of graphene heterostructures with hexagonal. C differential tunneling conductance curves measured on ag111 and graphene grag with a stabilization condition of v s.
The ability to assemble crystalline layered materials allows us to fabricated more complex graphene based heterostructures. Electronic transport in graphenebased heterostructures. Tailoring the structural and electronic properties of graphene. In this chapter i briefly discuss the basic electronic properties of the materials used in this thesis. Flexible and transparent mos2 fieldeffect transistors on. The past decade has seen a new paradigm in solid state physics, where a new class of layered crystals can be thinned down to a monolayer and exhibit drastic changes in their electronic and optical properties in comparison to their bulk counterpart. Accepted manuscript open access excellent electronic. Tuning the band structure, magnetic and transport properties of the zigzag graphene nanoribbonshexagonal boron nitride heterostructures by transverse electric field j.
The sp2 hybridization between one s orbital and two p orbitals leads to a trigonal planar structure with a formation of aecules consisting of wrapped graphene by the introduction of bond. The family of 2d crystals has grown to includes metals e. In this paper, we study theoretically the midinfrared optical properties of the vdw heterostructure based on the graphenehbn system. Synthesis, structure and applications of graphenebased 2d. Request pdf electronic properties of graphene encapsulated with different twodimensional atomic crystals hexagonal boron. Graphene, hexagonal boron nitride, and heterostructure. The inplane heterostructures composed of graphene and hexagonal boron nitride gbn, as the first kind of twodimensional metalsemiconductor heterostructures of oneatom thickness, are attractive for both fundamental lowdimensional physics and nanoscale devices because of the tailorable electronic properties. When a heterostructures of graphene and hbn is formed, the complex.
Electronic properties of graphene heterostructures with hexagonal crystals springer theses kindle edition by wallbank, john r download it once and read it on your kindle device, pc, phones or tablets. Interface formation in monolayer grapheneboron nitride. To understand how the constituents a ect each other depending on the layer stacking, we examine twelve commensurate arrangements. Tuning electronic properties of graphene heterostructures. Jones4 1department of physics, tampere university of technology, p. Graphene was the first, and certainly most outstanding, of this set of so called twodimensional 2d materials. Here, we use a combination of in situ microscopy techniques to study the growth and interface formation of monolayer grapheneboron nitride heterostructures on ruthenium. Electronic properties of graphene heterostructures with hexagonal crystals. A stm topography image of asgrown singlelayer graphene on ag111 v s 0. Photothermionic effect in vertical graphene heterostructures. Pdf electronic properties of graphenehexagonalboronnitride. Sorry, we are unable to provide the full text but you may find it at the following locations. The compression and release process provides a dynamic mechanism to control electronic properties in these heterostructures.
Electrical properties and applications of graphene, hexagonal boron nitride hbn. The chiral properties of dirac electrons in monolayer graphene and the berry phase. Piezoelectricity in monolayer hexagonal boron nitride. Electronic properties of graphene encapsulated with. Electronic properties of graphenehexagonalboronnitride moire superlattice. The atomic structures and electronic properties of interfaces in lateral gbn.
We also demonstrate resonant tunneling in double bilayer graphene heterostructures using hexagonal boron nitride hbn as an interlayer dielectric, in which rotational alignment between the. The mos2graphene heterostructure is encapsulated with a thin hbn layer. Box 692, fi33101 tampere, finland 2comp centre of excellence, department of applied physics, aalto university, fi00076 aalto, finland. Tuning the valley and chiral quantum state of dirac.
Precise spatial control over the electrical properties of thin films is the key capability enabling the production of modern integrated circuitry. We use the enhanced mobility of electrons in hbn supported graphene to investigate the effects of electronic interactions, where a variety of nontrivial integer and fractional quantum hall states were observed. Hexagonal boron nitride is the only substrate that has so far allowed. Electronic properties of phosphorenegraphene and phosphorene hexagonal boron nitride heterostructures article in the journal of physical chemistry c 119. In its purest form, graphene has exceptional room temperature electronic properties making it an attractive alternative to silicon for the electronics industry. The development of methods for manufacturing and aligning highquality twodimensional crystals has facilitated the creation of a new generation of materials. However, when the interlayer distance is reduced by compression, some novel properties emerge. We employ raman spectroscopy, cathodoluminescence, and electronic transport measurements to show the highquality of such monoisotopic bn and its potential for graphenebased heterostructures. Electrical properties and applications of graphene, hexagonal boron nitride h bn. The fascination with graphene has been growing very rapidly in recent years and. Can other atomically flat crystals be used as substrates for. Hexagonal boron nitride is the only substrate that has so far allowed graphene devices exhibiting micrometerscale ballistic transport. Electronic properties of graphenesingle crystal diamond.
The discussion of graphenes electronic properties and how such relativistic e. Read electronic properties of graphene heterostructures with hexagonal crystals by john r. Can other atomically flat crystals be used as substrates for making quality graphene heterostructures. Modification of the electronic properties of hexagonal boronnitride in bngraphene vertical heterostructures to cite this article. Atomically thin forms of layered materials, such as conducting graphene, insulating hexagonal boron nitride hbn, and semiconducting molybdenum disulfide mos2, have generated great interests recently due to the possibility of combining diverse atomic layers by mechanical stacking to create novel materials and devices. Pdf electrical properties and applications of graphene. The devices fabricated by encapsulating graphene with molybdenum or tungsten disulfides and hbn are. Graphene, hexagonal boron nitride, and their heterostructures. Structural and electronic properties of interfaces in. The process is not only more scalable, but also allows to grow isotopically puri ed bn crystals. The last decade has witnessed the discovery of, and dramatic progress in understanding the physics of graphene and relat. Electronic properties of graphene heterostructures with. Graphene and boron nitride lateral heterostructures for. Modification of the electronic properties of hexagonal.