Zobrazeno 1 - 10
of 388
pro vyhledávání: '"Simpson, J R"'
Autor:
Li, Yufei, Mai, Thuc T., Karaki, M., Jasper, E. V., Garrity, K. F., Lyon, C., Shaw, D., DeLazzer, T., Biacchi, A. J., Dally, R. L., Heligman, D. M., Gdanski, J., Adel, T., Muñoz, M. F., Giovannone, A., Pawbake, A., Faugeras, C., Simpson, J. R., Ross, K., Trivedi, N., Lu, Y. M., Walker, A. R. Hight, Aguilar, R. Valdés
Publikováno v:
Phys. Rev. B. 109, 184436 (2024)
The magnetic interactions that determine magnetic order and magnon energies typically involve only two spins. While rare, multi-spin interactions can also appear in quantum magnets and be the driving force in the ground state selection and in the nat
Externí odkaz:
http://arxiv.org/abs/2212.05278
Autor:
Mai, Thuc T., Garrity, K. F., McCreary, A., Argo, J., Simpson, J. R., Doan-Nguyen, V., Aguilar, R. Valdes, Walker, A. R. Hight
Magnetic excitations in van der Waals (vdW) materials, especially in the two-dimensional (2D) limit, are an exciting research topic from both the fundamental and applied perspectives. Using temperature-dependent, magneto-Raman spectroscopy, we identi
Externí odkaz:
http://arxiv.org/abs/2011.12557
Autor:
Mai, Thuc T., McCreary, A., Lampen-Kelley, P., Butch, N., Simpson, J. R., Yan, J. -Q., Nagler, S. E., Mandrus, D., Walker, A. R. Hight, Aguilar, R. Valdes
Publikováno v:
Phys. Rev. B 100, 134419 (2019)
Polarization-resolved Raman spectroscopy was performed and analyzed from large, high quality, mono-domain single crystal of {\alpha}-RuCl3, a proximate Kitaev quantum spin liquid. Spectra were collected with laser polarizations parallel and perpendic
Externí odkaz:
http://arxiv.org/abs/1908.01021
Akademický článek
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We compare Raman spectra from aqueous suspensions of length-separated single-walled carbon nanotubes (SWCNTs) dispersed using either polymer adsorption of single-stranded DNA or miscelle encapsulation with sodium deoxycholate surfactant. The Raman sp
Externí odkaz:
http://arxiv.org/abs/0811.0180
Autor:
Guha, S., Ghosh, K., Keeth, J. G., Ogale, S. B., Shinde, S. R., Simpson, J. R., Drew, H. D., Venkatesan, T.
We present the results of Raman and photoluminescence (PL) studies on epitaxial anatase phase Ti$_{1-x}$Co$_x$O$_2$ films for $x$ = 0-0.07, grown by pulsed laser deposition. The low doped system ($x$=0.01 and 0.02) shows a Curie temperature of ~700 K
Externí odkaz:
http://arxiv.org/abs/cond-mat/0303177
Autor:
Ogale, S. B., Choudhary, R. J., Buban, J. P., Lofland, S. E., Shinde, S. R., Kale, S. N., Kulkarni, V. N., Higgins, J., Lanci, C., Simpson, J. R., Browning, N. D., Sarma, S. Das, Drew, H. D., Greene, R. L., Venkatesan, T.
Occurrence of room temperature ferromagnetism is demonstrated in pulsed laser deposited thin films of Sn1-xCoxO2-d (x<0.3). Interestingly, films of Sn0.95Co0.05O2-d grown on R-plane sapphire not only exhibit ferromagnetism with a Curie temperature cl
Externí odkaz:
http://arxiv.org/abs/cond-mat/0301456
Autor:
Souchkov, A. B., Simpson, J. R., Drew, H. D., Quijada, M., Ishibashi, H., Hur, N., Ahn, J. S., Cheong, S. W., Millis, A. J.
We have measured the optical conductivity of single crystal LuMnO3 from 10 to 45000 cm-1 at temperatures between 4 and 300 K. A symmetry allowed on-site Mn $d$-$d$ transition near 1.7 eV is observed to blue shift (~0.1 eV) in the antiferromagnetic st
Externí odkaz:
http://arxiv.org/abs/cond-mat/0212644
We report on the optical properties of magnetic cobalt-doped anatase phase titanium dioxide Ti_{1-x}Co_{x}O_{2-d} films for low doping concentrations, 0 <= x <= 0.02, in the spectral range 0.2 to 5 eV. For well oxygenated films (d << 1) the optical c
Externí odkaz:
http://arxiv.org/abs/cond-mat/0205626
Autor:
Shinde, S. R., Ogale, S. B., Sarma, S. Das, Simpson, J. R., Drew, H. D., Lofland, S. E., Lanci, C., Buban, J. P., Browning, N. D., Kulkarni, V. N., Higgins, J., Sharma, R. P., Greene, R. L., Venkatesan, T.
Pulsed laser deposited films of Co doped anatase TiO2 are examined for Co substitutionality, ferromagnetism, transport, magnetotransport and optical properties. Our results show limited solubility (up to ~ 2 %) of Co in the as-grown films and formati
Externí odkaz:
http://arxiv.org/abs/cond-mat/0203576