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Electron and hole contributions to normal-state transport in the superconducting system Sn$_{1-x}$In$_x$Te

Autor: Zhang, Cheng, He, Xu-Gang, Chi, Hang, Zhong, Ruidan, Ku, Wei, Gu, Genda, Tranquada, J. M., Li, Qiang

Publikováno v: Phys. Rev. B 98, 054503 (2018)

Indium-doped SnTe has been of interest because the system can exhibit both topological surface states and bulk superconductivity. While the enhancement of the superconducting transition temperature is established, the character of the electronic stat

Externí odkaz: http://arxiv.org/abs/1802.09882

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'Forbidden' phonon: dynamical signature of bond symmetry breaking in the iron chalcogenides

Autor: Fobes, David M., Zaliznyak, Igor A., Tranquada, John M., Xu, Zhijun, Gu, Genda, He, Xu-Gang, Ku, Wei, Zhao, Yang, Matsuda, Masaaki, Garlea, V. Ovidu, Winn, Barry

Publikováno v: Phys. Rev. B 94, 121103 (2016)

Investigation of the inelastic neutron scattering spectra in Fe$_{1+y}$Te$_{1-x}$Se$_{x}$ near a signature wave vector $\mathbf{Q} = (1,0,0)$ for the bond-order wave (BOW) formation of parent compound Fe$_{1+y}$Te [Phys. Rev. Lett. 112, 187202 (2014)

Externí odkaz: http://arxiv.org/abs/1509.05930

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Generic Symmetry Breaking Instability of Topological Insulators due to a Novel van Hove Singularity

Autor: He, Xu-Gang, Xi, Xiaoxiang, Ku, Wei

We point out that in the deep band-inverted state, topological insulators are generically vulnerable against symmetry breaking instability, due to a divergently large density of states of 1D-like exponent near the chemical potential. This feature at

Externí odkaz: http://arxiv.org/abs/1410.2885

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Bulk Signatures of Pressure-Induced Band Inversion and Topological Phase Transitions in Pb$_{1-x}$Sn$_x$Se

Autor: Xi, Xiaoxiang, He, Xu-Gang, Guan, Fen, Liu, Zhenxian, Zhong, R. D., Schneeloch, J. A., Liu, T. S., Gu, G. D., Xu, D., Chen, Z., Hong, X. G., Ku, Wei, Carr, G. L.

Publikováno v: Phys. Rev. Lett. 113, 096401 (2014)

The characteristics of topological insulators are manifested in both their surface and bulk properties, but the latter remain to be explored. Here we report bulk signatures of pressure-induced band inversion and topological phase transitions in Pb$_{

Externí odkaz: http://arxiv.org/abs/1406.1726

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Dissipative solitons stabilized by a quantum Zeno-like effect

Autor: Luo, Hong-Gang, Zhao, Dun, He, Xu-Gang, Li, Lin

An unstable particle in quantum mechanics can be stabilized by frequent measurements, known as the quantum Zeno effect. A soliton with dissipation behaves like an unstable particle. Similar to the quantum Zeno effect, here we show that the soliton ca

Externí odkaz: http://arxiv.org/abs/0808.3437

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Transformation from the nonautonomous to standard NLS equations

Autor: Zhao, Dun, He, Xu-Gang, Luo, Hong-Gang

Publikováno v: Eur. Phys. J. D 53, 213-216 (2009)

In this paper we show a systematical method to obtain exact solutions of the nonautonomous nonlinear Schr\"odinger (NLS) equation. An integrable condition is first obtained by the Painlev\`e analysis, which is shown to be consistent with that obtaine

Externí odkaz: http://arxiv.org/abs/0807.1192

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