Zobrazeno 1 - 10
of 240
pro vyhledávání: '"Warren, J B"'
Autor:
Li, Lijun, Deng, Xiaoyu, Wang, Zhen, Liu, Yu, Abeykoon, A. M. Milinda, Dooryhee, E., Tomic, A., Huang, Yanan, Warren, J. B., Bozin, E. S., Billinge, S. J . L., Sun, Y. P., Zhu, Yimei, Kotliar, G., Petrovic, C.
We report on the emergence of robust superconducting order in single crystal alloys of 2H-TaSe$_{2-x}$S$_{x}$ (0$\leq$x$\leq$2) . The critical temperature of the alloy is surprisingly higher than that of the two end compounds TaSe$_{2}$ and TaS$_{2}$
Externí odkaz:
http://arxiv.org/abs/1608.06275
Autor:
Wang, Aifeng, Wu, Lijun, Ivanovski, V. N., Warren, J. B., Tian, Jianjun, Zhu, Yimei, Petrovic, C.
Publikováno v:
Phys. Rev. B 94, 094506 (2016)
We report critical current density ($J_c$) in tetragonal FeS single crystals, similar to iron based superconductors with much higher superconducting critical temperatures ($T_{c}$'s). The $J_c$ is enhanced 3 times by 6\% Se doping. We observe scaling
Externí odkaz:
http://arxiv.org/abs/1605.09791
Publikováno v:
Phys. Rev. B 90, 020502 (2014)
We report evidence for multiband transport and an insulating low-temperature normal state in superconducting K$_{0.50}$Na$_{0.24}$Fe$_{1.52}$Se$_{2}$ with $T_{c}\approx 20$ K. The temperature-dependent upper critical field, $H_{c2}$, is well describe
Externí odkaz:
http://arxiv.org/abs/1604.06793
Publikováno v:
Phys. Rev. B 91, 174517 (2015)
We report discovery of KFe$_{1.05}$Ag$_{0.88}$Te$_{2}$ single crystals with semiconducting spin glass ground state. Composition and structure analysis suggest nearly stoichiometric I4/mmm space group but allow for the existence of vacancies, absent i
Externí odkaz:
http://arxiv.org/abs/1604.06086
Autor:
Ryu, Hyejin, Abeykoon, Milinda, Wang, Kefeng, Lei, Hechang, Lazarevic, N., Warren, J. B., Bozin, E. S., Popovic, Z. V., Petrovic, C.
Publikováno v:
Phys. Rev. B 91, 184503 (2015)
We report electron doping effects by Ni in K$_{x}$Fe$_{2-\delta-y}$Ni$_{y}$Se$_{2}$ (0.06 $\leq$ $y$ $\leq$ 1.44) single crystal alloys. A rich ground state phase diagram is observed. Small amount of Ni ($\sim$ 4\%) suppressed superconductivity below
Externí odkaz:
http://arxiv.org/abs/1604.05713
Autor:
Ryu, Hyejin, Wang, Kefeng, Opacic, M., Lazarevic, N., Warren, J. B., Popovic, Z. V., Bozin, E. S., Petrovic, C.
Publikováno v:
Phys. Rev. B 92, 174522 (2015)
We present Co substitution effects in K$_{x}$Fe$_{2-y-z}$Co$_{z}$Se$_{2}$ (0.06 $\leq$ $z$ $\leq$ 1.73) single crystal alloys. By 3.5\% of Co doping superconductivity is suppressed whereas phase separation of semiconducting K$_{2}$Fe$_{4}$Se$_{5}$ an
Externí odkaz:
http://arxiv.org/abs/1604.03545
Autor:
Wang, Aifeng, Zaliznyak, I., Ren, Weijun, Wu, Lijun, Graf, D., Garlea, V. O., Warren, J. B., Bozin, E., Zhu, Yimei, Petrovic, C.
We report two-dimensional quantum transport and Dirac fermions in YbMnBi2 single crystals. YbMnBi2 is a layered material with anisotropic conductivity and magnetic order below 290 K. Magnetotransport properties, nonzero Berry phase and small cyclotro
Externí odkaz:
http://arxiv.org/abs/1604.01009
We report superconductivity, physical and structural properties of Ir1-xRhxTe2 (0<=x<=0.3). Superconducting transition with maximum Tc~2.6 K appears when the doping content of Rh x is in between 0.15 and 0.3. Further increasing the content of Rh will
Externí odkaz:
http://arxiv.org/abs/1307.7029
We have synthesized K0.95(1)Ni1.86(2)Se2 single crystals. The single crystals contain K and Ni deficiencies not observed in KNi2Se2 polycrystals. Unlike KNi2Se2 polycrystals, the superconductivity is absent in single crystals. The detailed physical p
Externí odkaz:
http://arxiv.org/abs/1211.1371
Autor:
Hu, Rongwei, Lei, Hechang, Abeykoon, Milinda, Bozin, Emil S., Billinge, Simon J. L., Warren, J. B., Siegrist, Theo, Petrovic, C.
Publikováno v:
Phys. Rev. B 83, 224502 (2011)
Understanding iron based superconductors requires high quality impurity free single crystals. So far they have been elusive for beta-FeSe and extraction of intrinsic materials properties has been compromised by several magnetic impurity phases. Herei
Externí odkaz:
http://arxiv.org/abs/1107.1496