Detail publikace

Possible charge ordering and anomalous transport in graphene/graphene quantum dot heterostructure

ROY, R. HOLEC, D. MICHAL, L. HEMZAL, D. SARKAR, S. KUMAR, G. NEČAS, D. DHANKHAR, M. KAUSHIK, P. GOMEZ PEREZ, I. ZAJÍČKOVÁ, L.

Originální název

Possible charge ordering and anomalous transport in graphene/graphene quantum dot heterostructure

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Observations of superconductivity and charge density waves (CDW) in graphene have been elusive thus far due to weak electron-phonon coupling (EPC) interactions. Here, we report a unique observation of anomalous transport and multiple charge ordering phases at high temperatures ( T 1 similar to 213 K , T 2 similar to 325 K ) in a 0D-2D van der Waals (vdW) heterostructure comprising of single layer graphene (SLG) and functionalized (amine) graphene quantum dots (GQD). The presence of functionalized GQD contributed to charge transfer with shifting of the Dirac point similar to 0.05 eV above the Fermi level (ab initio simulations) and carrier density n similar to - 0.3 x 10 12 cm - 2 confirming p-doping in SLG and two-fold increase in EPC interaction was achieved. Moreover, we elucidate the interplay between electron-electron and electron-phonon interactions to substantiate high temperature EPC driven charge ordering in the heterostructure through analyses of magnetotransport and weak anti-localization (WAL) framework. Our results provide impetus to investigate strongly correlated phenomena such as CDW and superconducting phase transitions in novel graphene based heterostructures.

Klíčová slova

graphene; graphene quantum dots; heterostructure; charge ordering; Raman spectroscopy; low temperature transport; ab initio simulation

Autoři

ROY, R.; HOLEC, D.; MICHAL, L.; HEMZAL, D.; SARKAR, S.; KUMAR, G.; NEČAS, D.; DHANKHAR, M.; KAUSHIK, P.; GOMEZ PEREZ, I.; ZAJÍČKOVÁ, L.

Vydáno

3. 6. 2024

Nakladatel

IOP Publishing Ltd

Místo

BRISTOL

ISSN

1361-648X

Periodikum

Journal of Physics Condensed Matter

Ročník

36

Číslo

26

Stát

Spojené království Velké Británie a Severního Irska

Strany od

265601

Strany do

265612

Strany počet

12

URL

https://iopscience.iop.org/article/10.1088/1361-648X/ad31bf

Plný text v Digitální knihovně

http://hdl.handle.net/11012/249532

BibTex

@article{BUT188421,
  author="Rajarshi {Roy} and David {Holec} and Lukáš {Michal} and Dušan {Hemzal} and Saikat {Sarkar} and Gundam Sandeep {Kumar} and David {Nečas} and Meena {Dhankhar} and Preeti {Kaushik} and Inmaculada Jennifer {Gomez Perez} and Lenka {Zajíčková}",
  title="Possible charge ordering and anomalous transport in graphene/graphene quantum dot heterostructure",
  journal="Journal of Physics Condensed Matter",
  year="2024",
  volume="36",
  number="26",
  pages="12",
  doi="10.1088/1361-648X/ad31bf",
  issn="1361-648X",
  url="https://iopscience.iop.org/article/10.1088/1361-648X/ad31bf"
}