Strong charge density wave fluctuation and sliding state in PdTeI with quasi-one-dimensional PdTe chains
Hechang Lei (雷和畅), Kai Liu (刘凯), Jun-ichi Yamaura, Sachiko Maki, Youichi Murakami, Zhong-Yi Lu (卢仲毅), and Hideo Hosono
Phys. Rev. B 93, 121101(R) (2016) - Published 1 March, 2016
In quasi-one-dimensional (quasi-1D) systems, because of the finite interchain coupling and fluctuation, the charge density wave (CDW) transition temperature is much lower than the mean-field-theory predicted and the CDW fluctuation region exists between and . Usually, CDW fluctuation has little effect on the electronic transport properties. Moreover, the CDW state is usually insensitive to magnetic field. The work done here on a PdTeI single crystal with quasi-1D PdTe chains shows that the above statements need to be revisited. It is found that the CDW fluctuation leads to a gradual decrease of carrier concentration before the static long-range CDW order occurs at ~110 K. On the other hand, the pinning and sliding of CDW state are observed below ~6 K. When such a low is combined with the existence of multiple quasi-1D bands, PdTeI exhibits exotic crossover behavior from negative to huge positive magnetoresistance under magnetic field and field-induced localization. It indicates that the CDW fluctuation could have a remarkable influence on transport properties of CDW materials. Moreover, there is an interaction between the CDW state and magnetic field.
Origin of the kink in the band dispersion of the ferromagnetic perovskite : Electron-phonon coupling
H. F. Yang, Z. T. Liu, C. C. Fan, Q. Yao, P. Xiang, K. L. Zhang, M. Y. Li, H. Li, J. S. Liu, D. W. Shen, and M. H. Jiang
Phys. Rev. B 93, 121102(R) (2016) - Published 4 March, 2016
SrRuO, a conductive ferromagnetic oxide, is a simple, old, but still fascinating material. Previous angle-resolved photoemission (ARPES) studies found a kink structure in the electron bands, implying unusual electron dynamics. Here, the authors explore the origin of this kink in more detail via ARPES studies of high-quality films of varying thickness. The results indicate that the kink originates from the strong electron-phonon coupling rather than electron-magnon coupling.
Electron dichotomy on the defect surface augmented by many-body effects
Frank Lechermann, Harald O. Jeschke, Aaram J. Kim, Steffen Backes, and Roser Valentí
Phys. Rev. B 93, 121103(R) (2016) - Published 9 March, 2016
Simple effective interaction for dimensional crossover
Lucian A. Constantin
Phys. Rev. B 93, 121104(R) (2016) - Published 9 March, 2016
Quantum oscillations and the Fermi surface topology of the Weyl semimetal NbP
J. Klotz, Shu-Chun Wu, Chandra Shekhar, Yan Sun, Marcus Schmidt, Michael Nicklas, Michael Baenitz, M. Uhlarz, J. Wosnitza, Claudia Felser, and Binghai Yan
Phys. Rev. B 93, 121105(R) (2016) - Published 11 March, 2016
Quantization and topological states in the spin Hall conductivity of low-dimensional systems: An ab initio study
L. Matthes, S. Küfner, J. Furthmüller, and F. Bechstedt
Phys. Rev. B 93, 121106(R) (2016) - Published 14 March, 2016
Splitting between bright and dark excitons in transition metal dichalcogenide monolayers
J. P. Echeverry, B. Urbaszek, T. Amand, X. Marie, and I. C. Gerber
Phys. Rev. B 93, 121107(R) (2016) - Published 16 March, 2016
The optical properties of 2D semiconductors made of transition metal dichalcogenide monolayers, such as Mo and W (=S, Se), are dominated by excitons. The light emission yield for optoelectronics applications depends on whether the electron-hole transitions are optically allowed (bright) or forbidden (dark). No direct evidence of the energetic ordering of these exciton states is currently available. The authors here solve the Bethe-Salpeter equation with wave functions in order to determine the sign and amplitude of the splitting between bright and dark exciton states in the entire Mo and W monolayer family. They also evaluate the influence of pin-orbit coupling on the optical spectra and clearly demonstrate the strong impact of the intravalley Coulomb exchange term on the dark-bright exciton splitting, an important ingredient for engineering optoelectronics and spintronics applications.
Breakdown of compensation and persistence of nonsaturating magnetoresistance in gated thin flakes
Yilin Wang, Kefeng Wang, Janice Reutt-Robey, Johnpierre Paglione, and Michael S. Fuhrer
Phys. Rev. B 93, 121108(R) (2016) - Published 22 March, 2016
Probing critical surfaces in momentum space using real-space entanglement entropy: Bose versus Fermi
Hsin-Hua Lai and Kun Yang
Phys. Rev. B 93, 121109(R) (2016) - Published 23 March, 2016
Optical spectroscopy of the Weyl semimetal TaAs
B. Xu, Y. M. Dai, L. X. Zhao, K. Wang, R. Yang, W. Zhang, J. Y. Liu, H. Xiao, G. F. Chen, A. J. Taylor, D. A. Yarotski, R. P. Prasankumar, and X. G. Qiu
Phys. Rev. B 93, 121110(R) (2016) - Published 24 March, 2016
High-pressure induced modifications in the hybridization gap of the intermediate-valence compound
K. Nishiyama, T. Mito, G. Pristáš, T. Koyama, K. Ueda, T. Kohara, S. Gabáni, K. Flachbart, H. Fukazawa, Y. Kohori, N. Takeshita, N. Shitsevalova, and H. Ikeda
Phys. Rev. B 93, 121111(R) (2016) - Published 28 March, 2016
Helicity-protected ultrahigh mobility Weyl fermions in NbP
Zhen Wang, Yi Zheng, Zhixuan Shen, Yunhao Lu, Hanyan Fang, Feng Sheng, Yi Zhou, Xiaojun Yang, Yupeng Li, Chunmu Feng, and Zhu-An Xu
Phys. Rev. B 93, 121112(R) (2016) - Published 28 March, 2016
Drumhead surface states and topological nodal-line fermions in
Guang Bian, Tay-Rong Chang, Hao Zheng, Saavanth Velury, Su-Yang Xu, Titus Neupert, Ching-Kai Chiu, Shin-Ming Huang, Daniel S. Sanchez, Ilya Belopolski, Nasser Alidoust, Peng-Jen Chen, Guoqing Chang, Arun Bansil, Horng-Tay Jeng, Hsin Lin, and M. Zahid Hasan
Phys. Rev. B 93, 121113(R) (2016) - Published 28 March, 2016
Analysis in temporal regime of dispersive invisible structures designed from transformation optics
B. Gralak, G. Arismendi, B. Avril, A. Diatta, and S. Guenneau
Phys. Rev. B 93, 121114(R) (2016) - Published 31 March, 2016
Piecewise linearity in the approximation for accurate quasiparticle energy predictions
Matthias Dauth, Fabio Caruso, Stephan Kümmel, and Patrick Rinke
Phys. Rev. B 93, 121115(R) (2016) - Published 31 March, 2016









