Quasiparticle interference of the Fermi arcs and surface-bulk connectivity of a Weyl semimetal by Hiroyuki Inoue, András Gyenis, Zhijun Wang, Jian Li,

Slides:

Advertisements

Similar presentations

Quasiparticle Scattering in 2-D Helical Liquid arXiv: X. Zhou, C. Fang, W.-F. Tsai, J. P. Hu.

Advertisements

Fluctuating stripes at the onset of the pseudogap in the high-T c superconductor Bi 2 Sr 2 CaCu 2 O 8+  Parker et al Nature (2010)

Spatially resolved quasiparticle tunneling spectroscopic studies of cuprate and iron-based high-temperature superconductors Nai-Chang Yeh, California Institute.

Scattering and Interference in Epitaxial Graphene by G. M. Rutter, J. N. Crain, N. P. Guisinger, T. Li, P. N. First, and J. A. Stroscio Science Volume.

Fourier transform from r to k: Ã(k) =  A(r) e  i k r d 3 r Inverse FT from k to r: A(k) = (2  )  3  Ã(k) e +i k r d 3 k X-rays scatter off the charge.

Introduction to topological insulators and STM/S on TIs

Volume 94, Issue 1, Pages (January 2008)

Structural Quantum Size Effects in Pb/Si(111)

Volume 74, Issue 5, Pages (May 1998)

Volume 80, Issue 4, Pages (April 2001)

Toshiro Oda, Keiichi Namba, Yuichiro Maéda Biophysical Journal

Ultrafast Transient Absorption Studies on Photosystem I Reaction Centers from Chlamydomonas reinhardtii. 2: Mutations near the P700 Reaction Center Chlorophylls.

Optimal-Enhanced Solar Cell Ultra-thinning with Broadband Nanophotonic Light Capture Manuel J. Mendes, Sirazul Haque, Olalla Sanchez-Sobrado, Andreia.

Discovery of a Weyl fermion semimetal and topological Fermi arcs

Volume 84, Issue 2, Pages (February 2003)

Optimal-Enhanced Solar Cell Ultra-thinning with Broadband Nanophotonic Light Capture Manuel J. Mendes, Sirazul Haque, Olalla Sanchez-Sobrado, Andreia.

Landau Quantization and Quasiparticle Interference in the

Carlos R. Baiz, Andrei Tokmakoff Biophysical Journal

Observation of Fermi arc surface states in a topological metal

Microtubule Structure at 8 Å Resolution

Barbie K. Ganser-Pornillos, Anchi Cheng, Mark Yeager Cell

Down the Rabbit Hole: Sinking Electrons in a Weyl Sea

Rubén Díaz-Avalos, Donald L.D. Caspar Biophysical Journal

Microtubule Structure at 8 Å Resolution

One-dimensional topological edge states of bismuth bilayers

Solution Structures of Engineered Vault Particles

by Barry Bradlyn, Jennifer Cano, Zhijun Wang, M. G. Vergniory, C

Carlos R. Baiz, Andrei Tokmakoff Biophysical Journal

Analysis of Dynamic Brain Imaging Data

Volume 14, Issue 5, Pages (May 2006)

Dissecting DNA-Histone Interactions in the Nucleosome by Molecular Dynamics Simulations of DNA Unwrapping Ramona Ettig, Nick Kepper, Rene Stehr, Gero.

Observation of Intrinsic Quantum Well States and

Reactivity-Guided Interface Design in Na Metal Solid-State Batteries

Application of Singular Value Decomposition to the Analysis of Time-Resolved Macromolecular X-Ray Data Marius Schmidt, Sudarshan Rajagopal, Zhong Ren,

Ballistic miniband conduction in a graphene superlattice

Peering through Jupiter’s clouds with radio spectral imaging

Small Angle X-Ray Scattering Studies and Modeling of Eudistylia vancouverii Chlorocruorin and Macrobdella decora Hemoglobin Angelika Krebs, Helmut Durchschlag,

by Lawrence W. Cheuk, Matthew A. Nichols, Katherine R

Fig. 1 Sensing scheme with an atomic spin sensor.

Fig. 3 FM MnBi2Te4 bulk. FM MnBi2Te4 bulk. Crystal structure (A) and band structure (B) of the FM bulk. (C) Zoom-in band structures along the out-of-plane.

by Alberto Ambrosetti, Nicola Ferri, Robert A

Fig. 2 Zeeman splitting of the plateau and associated Kondo feature.

Fig. 4 First-principles DFT calculations.

Fig. 1 Crystal structure and calculated band structure.

Fig. 4 Twist grain boundary free energies as a function of misalignment angle for the (110)-(100) crystal planes of a nanocrystal with 1135 atoms. Twist.

Deformation of the Fermi surface in the

Fig. 3 Scan rate effects on the layer edge current.

Scattering and Interference in Epitaxial Graphene

Fig. 4 The results of HRTEM and high-angle annular dark-field scanning TEM investigations. The results of HRTEM and high-angle annular dark-field scanning.

Feature computation and classification of grating pitch.

Observation of Majorana fermions in a ferromagnetic chains on a superconductor Princeton Center for Complex Materials (DMR ) Stevan Nadj-Perge,

Fig. 2 Spatial distribution of earthquake density derived from a catalog spanning 93 nights of the LB Array data set. Spatial distribution of earthquake.

Fig. 1 A monolayer ReSe2 on a back-gated G/h-BN device.

Fig. 1 Topology and electronic structure of TaAs.

by Zhanghui Chen, and Lin-Wang Wang

3D strain-induced superconductivity in La2CuO4+δ using a simple vertically aligned nanocomposite approach by Eun-Mi Choi, Angelo Di Bernardo, Bonan Zhu,

Ultrahigh mobility and efficient charge injection in monolayer organic thin-film transistors on boron nitride by Daowei He, Jingsi Qiao, Linglong Zhang,

Fig. 2 Large-area and high-density assembly of AuNPs.

A strongly robust type II Weyl fermion semimetal state in Ta3S2

Superconducting topological surface states in the noncentrosymmetric bulk superconductor PbTaSe2 by Syu-You Guan, Peng-Jen Chen, Ming-Wen Chu, Raman Sankar,

Discovery of Lorentz-violating type II Weyl fermions in LaAlGe

by Shuichi Murakami, Motoaki Hirayama, Ryo Okugawa, and Takashi Miyake

by Mark T. Edmonds, James L

Fig. 3 Depth-resolved structural characterization of perovskite nanocrystals in npSi films. Depth-resolved structural characterization of perovskite nanocrystals.

Fig. 2 Observation of type II Weyl nodes in LaAlGe.

Bulk-boundary correspondence and topological nontrivial nature of TaP

Comparison of STM data on point impurities with DFT calculations

Fig. 4 Borophene-graphene vertical heterostructures.

Fig. 1 Atomic structure of U1−xThxSb2.

Electronic states of U1−xThxSb2 and their temperature evolution

Presentation transcript:

Quasiparticle interference of the Fermi arcs and surface-bulk connectivity of a Weyl semimetal by Hiroyuki Inoue, András Gyenis, Zhijun Wang, Jian Li, Seong Woo Oh, Shan Jiang, Ni Ni, B. Andrei Bernevig, and Ali Yazdani Science Volume 351(6278):1184-1187 March 11, 2016 Copyright © 2016, American Association for the Advancement of Science

Fig. 1 STM topography and dI/dV spectroscopy of Weyl semimetal TaAs. STM topography and dI/dV spectroscopy of Weyl semimetal TaAs. (A) Illustration of the crystal structure of TaAs with (001) As termination. One unit cell contains four layers of As and Ta. The lattice parameters are a = b = 3.43 Å and c = 11.64 Å. (B) STM topographic image (Vbias = 500 mV, Isetpoint = 100 pA) of the cleaved (001) surface of TaAs. Magnified views on some of the pronounced impurities (right panels) show apparent C2v symmetric deformation of the electronic structure. (C) Spatial variation of the differential conductance measurements along a line of 30 ‎Å, shown as a yellow line in (B), was measured with lock-in techniques employing 3-mV excitations at 707 Hz. The orange curve shows the spatially averaged dI/dV spectra. An atomically periodic modulation of the spectra is visible. (D) Topographic image and (E) conductance map at 120 meV (Vbias = –340 mV, Isetpoint = 80 pA) on the same area, where the C2v symmetric nature of the surface electronic states is clearly visible. Hiroyuki Inoue et al. Science 2016;351:1184-1187 Copyright © 2016, American Association for the Advancement of Science

Fig. 2 Quasiparticle interference of TaAs surface states. Quasiparticle interference of TaAs surface states. (A to D and I to L) Spatially resolved dI/dV conductance maps at different energies obtained on the area shown in Fig. 1B (Vbias = 240 meV, Isetpoint = 120 pA). (E to H and M to P) Symmetrized and drift-corrected Fourier transforms of the dI/dV maps (QPI maps). Red dot indicates the (2π, 2π) point in the reciprocal space in the unit of 1/a; PSD denotes power spectral density. In the color bar, m corresponds to the mean value of the map and σ to the standard deviation. (Q to S) Energy-momentum structure of the dI/dV maps (Vbias = 600 meV, Isetpoint = 80 pA) along the high-symmetry directions shown in (M). Hiroyuki Inoue et al. Science 2016;351:1184-1187 Copyright © 2016, American Association for the Advancement of Science

Fig. 3 Fermi arcs and quasiparticle interference. Fermi arcs and quasiparticle interference. (A) DFT-calculated Fermi arc contour of constant energy in first Brillouin zone (BZ) at +40 meV calculated projecting the DFT-calculated spectral density to the top unit cell. Green dots indicate the projected positions of the Weyl nodes, and arrows show the direction of the spin on the Fermi arcs. The combination of time-reversal symmetry and C2v symmetry implies vanishing out-of-plane component of the spin. FS, Fermi surface. (B) SSP derived from (A) marked by regions of strong scattering in the middle of the BZ, which is missing in the QPI data. (C) The integrated spectral density over the full BZ for As and Ta separately as a function of layer index shows the fast decay of As orbital states. (D) Weighted Fermi surface (WFS) calculated by projecting the electronic states only to the topmost As layer. The Q vectors indicate the scattering wave vectors expected. (E) SSP based on (D) with red boxes showing the scattering wave vectors mapped in (F). (F) QPI map at 40 meV (same as in Fig. 2G) and experimentally observed groups of Q vectors. FT-STS, Fourier transform–scanning tunneling spectroscopy. Hiroyuki Inoue et al. Science 2016;351:1184-1187 Copyright © 2016, American Association for the Advancement of Science

Fig. 4 Comparison of the FT-STS maps with the DFT calculation at various energies. Comparison of the FT-STS maps with the DFT calculation at various energies. (A to C and G to I) QPI maps (same as in Fig. 2) and (D to F and J to L) the corresponding SSP derived from the projection of the spectral density to the topmost As. The obtained data and the calculations are in agreement over a wide energy range. (M to O) Enlargement of the Q9 and Q3 vectors in the calculated JDOS, SSP, and QPI data at different energies. Whereas strong triple-arc structures are visible in JDOS, SSP shows a reduced number of arcs, which is consistent with the single arcs in the QPI data. Hiroyuki Inoue et al. Science 2016;351:1184-1187 Copyright © 2016, American Association for the Advancement of Science