Zobrazeno 1 - 10
of 150
pro vyhledávání: '"Bark, C. W."'
Autor:
Mehta, M. M., Dikin, D. A., Bark, C. W., Ryu, S., Folkman, C. M., Eom, C. B., Chandrasekhar, V.
Publikováno v:
Phys. Rev. B 90, 100506(R) (2014)
We present a study of the magnetic field tuned superconductor-to-insulator transition (SIT) in the electron gas that forms at the LaAlO$_3$/SrTiO$_3$ interface. We find that the magnetic field induces a transition into a weakly insulating state, as i
Externí odkaz:
http://arxiv.org/abs/1309.3612
Autor:
Mehta, Manan, Dikin, D. A., Bark, C. W., Ryu, S., Folkman, C. M., Eom, C. B., Chandrasekhar, V.
Publikováno v:
Nature Communications, 3, 955 (2012)
The concept of duality has proved extremely powerful in extending our understanding in many areas of physics (1, 2). Charge-vortex duality has been proposed (3, 4) as a model to understand the superconductor to insulator transition (SIT) in disordere
Externí odkaz:
http://arxiv.org/abs/1207.7053
We report strong localization of 2D electron gas in LaAlO3 / SrTiO3 epitaxial thin-film heterostructures grown on (LaAlO3)0.3-(Sr2AlTaO3)0.7 substrates by using pulsed laser deposition with in-situ reflection high-energy electron diffraction. Using l
Externí odkaz:
http://arxiv.org/abs/1110.3252
Autor:
Lu, H., Bark, C. -W., Ojos, D. Esque de los, Alcala, J., Eom, C. -B., Catalan, G., Gruverman, A.
Ferroelectric materials are characterized by the presence of an electric dipole that can be reversed by application of an external electric field, a feature that is exploited in ferroelectric memories. All ferroelectrics are piezoelectric, and theref
Externí odkaz:
http://arxiv.org/abs/1110.1306
Ferromagnetism is usually considered to be incompatible with conventional superconductivity, as it destroys the singlet correlations responsible for the pairing interaction. Superconductivity and ferromagnetism are known to coexist in only a few bulk
Externí odkaz:
http://arxiv.org/abs/1103.4006
Autor:
Yong, Jie, Lee, S., Jiang, J., Bark, C. W., Weiss, J. D., Hellstrom, E. E., Larbalestier, D. C., Eom, C. B., Lemberger, T. R.
Publikováno v:
Phys. Rev. B 83, 104510 (2011)
We report the first direct measurements of superfluid density, ns(T) \propto {\lambda}-2(T), in films of Fe-pnictide superconductors. The magnetic penetration depth, {\lambda}(0), in our epitaxial, single-crystal Ba(CoxFe1-x)2As2 films near optimal d
Externí odkaz:
http://arxiv.org/abs/1101.5363
Autor:
Bark, C. W., Felker, D. A., Wang, Y., Zhang, Y., Jang, H. W., Folkman, C. M., Park, J. W., Baek, S. H., Pan, X. Q., Tsymbal, E. Y., Rzchowski, M. S., Eom, C. B.
Recently a metallic state was discovered at the interface between insulating oxides, most notably LaAlO3 and SrTiO3. Properties of this two-dimensional electron gas (2DEG) have attracted significant interest due to its potential applications in nanoe
Externí odkaz:
http://arxiv.org/abs/1011.4082
Autor:
Mehta, Manan, Sheet, Goutam, Dikin, D. A., Lee, S., Bark, C. W., Jiang, J., Weiss, J. D., Hellstrom, E. E., Rzchowski, M. S., Eom, C. B., Chandrasekhar, V.
Publikováno v:
Appl. Phys. Lett. 97, 012503 (2010)
Point-contact spectroscopy is a powerful tool for probing superconductors. One of the most common observations in the point-contact spectra on the recently discovered ferropnictide superconductors is a large conductance asymmetry with respect to volt
Externí odkaz:
http://arxiv.org/abs/1005.1626
Autor:
Sheet, Goutam, Mehta, Manan, Dikin, D. A., Lee, S., Bark, C. W., Jiang, J., Weiss, J. D., Hellstrom, E. E., Rzchowski, M. S., Eom, C. B., Chandrasekhar, V.
Publikováno v:
Phys. Rev. Lett. 105, 167003 (2010)
The normal state properties of the recently discovered ferropnictide superconductors might hold the key to understanding their exotic superconductivity. Using point-contact spectroscopy we show that Andreev reflection between an epitaxial thin film o
Externí odkaz:
http://arxiv.org/abs/1004.4852
Autor:
Perucchi, A., Baldassarre, L., Marini, C., Lupi, S., Jiang, J., Weiss, J. D., Hellstrom, E. E., Lee, S., Bark, C. W., Eom, C. B., Putti, M., Pallecchi, I., Dore, P.
Publikováno v:
Eur. Phys. J. B 77, 25 (2010)
We measured the THz reflectance properties of a high quality epitaxial thin film of the Fe-based superconductor BaFe$_{1.84}$Co$_{0.16}$As$_2$ with T$_c$=22.5 K. The film was grown by pulsed laser deposition on a DyScO$_3$ substrate with an epitaxial
Externí odkaz:
http://arxiv.org/abs/1003.0565