Zobrazeno 1 - 10
of 89
pro vyhledávání: '"Poumirol, J. M."'
Studying the collective excitations in charge neutral graphene (CNG) has recently attracted a great interest because of unusual mechanisms of the charge carrier dynamics. The latter can play a crucial role, for instance, for superconducting phases in
Externí odkaz:
http://arxiv.org/abs/2010.00306
Autor:
Stucky, A., Scheerer, G., Ren, Z., Jaccard, D., Poumirol, J. -M., Barreteau, C., Giannini, E., van der Marel, D.
We report the influence on the superconducting critical temperature $T_c$ in doped SrTiO$_3$ of the substitution of the natural $^{16}$O atoms by the heavier isotope $^{18}$O. We observe that for a wide range of doping this substitution causes a stro
Externí odkaz:
http://arxiv.org/abs/1610.10045
Autor:
Pradhan, N. R., Rhodes, D., Memaran, S., Poumirol, J. M., Smirnov, D., Talapatra, S., Feng, S., Perea-Lopez, N., Elias, A. L., Terrones, M., Ajayan, P. M., Balicas, L.
Publikováno v:
Sci. Rep. 5, 8979 (2015)
Here, we present a temperature ($T$) dependent comparison between field-effect and Hall mobilities in field-effect transistors based on few-layered WSe$_2$ exfoliated onto SiO$_2$. Without dielectric engineering and beyond a $T$-dependent threshold g
Externí odkaz:
http://arxiv.org/abs/1502.00335
Autor:
Lee, Y., Tran, D., Myhro, K., Velasco Jr., J., Gillgren, N., Poumirol, J. M., Smirnov, D., Barlas, Y., Lau, C. N.
Publikováno v:
Nano Letters,16, 227 (2016)
Using transport measurements, we investigate multicomponent quantum Hall (QH) ferromagnetism in dual-gated rhombohedral trilayer graphene (r-TLG), in which the real spin, orbital pseudospin and layer pseudospins of the lowest Landau level form sponta
Externí odkaz:
http://arxiv.org/abs/1406.3132
Autor:
Lee, Y., Tran, D., Myhro, K., Velasco Jr., J., Gillgren, N., Lau, C. N., Barlas, Y., Poumirol, J. M., Smirnov, D., Guinea, F.
Due to their unique electron dispersion and lack of a Fermi surface, Coulomb interactions in undoped two-dimensional Dirac systems, such as single, bi- and tri-layer graphene, can be marginal or relevant. Relevant interactions can result in spontaneo
Externí odkaz:
http://arxiv.org/abs/1402.6413
Autor:
Ludwig, J., Vasilyev, Yu. B., Mikhailov, N. N., Poumirol, J. M., Jiang, Z., Vafek, O., Smirnov, D.
We report on Landau level spectroscopy studies of two HgTe quantum wells (QWs) near or at the critical well thickness, where the band gap vanishes. In magnetic fields up to $B$=16T, oriented perpendicular to the QW plane, we observe a $\sqrt{B}$ depe
Externí odkaz:
http://arxiv.org/abs/1310.5036
Autor:
Poumirol, J. M., Yu, W., Chen, X., Berger, C., de Heer, W. A., Smith, M. L., Ohta, T., Pan, W., Goerbig, M. O., Smirnov, D., Jiang, Z.
Publikováno v:
Phys. Rev. Lett. 110, 246803 (2013)
We present infrared transmission spectroscopy study of the inter-Landau-level excitations in quasi-neutral epitaxial graphene nanoribbon arrays. We observed a substantial deviation in energy of the $L_{0(-1)}$$\to$$L_{1(0)}$ transition from the chara
Externí odkaz:
http://arxiv.org/abs/1305.4823
Autor:
Kim, Y., Poumirol, J. M., Lombardo, A., Kalugin, N. G., Georgiou, T., Kim, Y. J., Novoselov, K. S., Ferrari, A. C., Kono, J., Kashuba, O., Fal'ko, V. I., Smirnov, D.
Publikováno v:
Phys. Rev. Lett. 110, 227402 (2013)
We perform polarization-resolved Raman spectroscopy on graphene in magnetic fields up to 45T. This reveals a filling-factor-dependent, multi-component anticrossing structure of the Raman G peak, resulting from magnetophonon resonances between magneto
Externí odkaz:
http://arxiv.org/abs/1211.6094
Autor:
Kumar, A., Escoffier, W., Poumirol, J. M., Faugeras, C., Arovas, D. P., Fogler, M. M., Guinea, F., Roche, S., Goiran, M., Raquet, B.
Publikováno v:
Phys. Rev. Lett. 107, 126806, (2011)
The Integer Quantum Hall Effect (IQHE) is a distinctive phase of two-dimensional electronic systems subjected to a perpendicular magnetic field. Thus far, the IQHE has been observed in semiconductor heterostructures and in mono- and bi-layer graphene
Externí odkaz:
http://arxiv.org/abs/1104.1020
We report on magneto-transport measurement in disordered graphene under pulsed magnetic field of up to 57T. For large electron or hole doping, the system displays the expected anomalous Integer Quantum Hall Effect (IQHE) specific to graphene up to fi
Externí odkaz:
http://arxiv.org/abs/1004.2356