642 citations · 2k across the 9 of their papers we have counts for
9 papers
Competing Chern states revealed by quasiparticle charging in moiré rhombohedral graphene
Hongyuan Li, Zuhan Geng, Junseok Seo +13
Moiré materials realize a versatile platform for exploring the physics of fractional Chern insulators (FCIs). The recently observed evolution from FCIs to an extended quantum anoma…
Magnetic-field-induced superconductivity in hexalayer rhombohedral graphene
Jinghao Deng, Jiabin Xie, Hongyuan Li +5
In conventional superconductors, superconductivity is generally suppressed by external magnetic fields due to spin-singlet pairing. Here, we report signatures of in-plane-magnetic-…
Observation of Intra- and Inter-band Transitions in the Optical Response of Graphene
Leandro M. Malard, Kin Fai Mak, A. H. Castro Neto +2
The optical conductivity of freely suspended graphene was examined under non-equilibrium conditions using femtosecond pump-probe spectroscopy. We observed a conductivity transient…
Seeing many-body effects in single- and few-layer graphene: Observation of two-dimensional saddle-point excitons
Kin Fai Mak, Jie Shan, Tony F. Heinz
Significant excitonic effects were observed in graphene by measuring its optical conductivity in a broad spectral range including the two-dimensional π-band saddle-point singularit…
Thermal conductance at the graphene-SiO2 interface measured by optical pump-probe spectroscopy
Kin Fai Mak, Chun Hung Lui, Tony F. Heinz
We have examined the interfacial thermal conductance σint of single and multi-layer graphene samples prepared on fused SiO2 substrates by mechanical exfoliation of graphite. By usi…
Ultrafast Photoluminescence from Graphene
Chun Hung Lui, Kin Fai Mak, Jie Shan +1
Since graphene has no band gap, photoluminescence is not expected from relaxed charge carriers. We have, however, observed significant light emission from graphene under excitation…
Electron and optical phonon temperatures in electrically biased graphene
Stéphane Berciaud, Melinda Y. Han, Louis E. Brus +2
We examine the intrinsic energy dissipation steps in electrically biased graphene channels. By combining in-situ measurements of the spontaneous optical emission with a Raman spect…
Time-resolved Raman Spectroscopy of Optical Phonons in Graphite: Phonon Anharmonic Coupling and Anomalous Stiffening
Hugen Yan, Daohua Song
Time-resolved Raman spectroscopy has been applied to probe the anharmonic coupling and electron-phonon interaction of optical phonons in graphite. From the decay of the transient a…
Observation of an Electric-Field Induced Band Gap in Bilayer Graphene by Infrared Spectroscopy
Kin Fai Mak, Chun Hung Lui, Jie Shan +1
It has been predicted that application of a strong electric field perpendicular to the plane of bilayer graphene can induce a significant band gap. We have measured the optical con…