Content
1995, Volume 02, Issue 03
- 345-357 High-Resolution Core-Level Photoemission Investigations Of Alkali On Aluminum Adsorption Systems
by Jesper N. Andersen - 359-386 Alkali-Metal Adsorption Geometries On Metal Surfaces From Photoelectron-Diffraction Experiments
by R. Fasel & J. Osterwalder - 387-407 Alkali-Metal Adsorption On Copper And Nickel Surfaces
by Renee D. Diehl & Rónán Mcgrath - 409-422 STRUCTURAL PROPERTIES OF ALKALI-METAL ATOMS ADSORBED ONRu(0001)
by H. Over & H. Bludau & M. Gierer & G. Ertl
1995, Volume 02, Issue 02
- 141-145 OBSERVATION OF PHASE TRANSITIONS AT THE (100) SURFACE OFAl-3 at.% Ag
by E. Wetli & M. Hochstrasser & D. Pescia & M. Erbudak - 147-152 A PHOTOEMISSION STUDY OF THE ELECTRONIC STRUCTURE INDUCED BY POTASSIUM ADSORPTION ONTiO2(110)
by Rainer Heise & Ralf Courths - 153-157 CHEMISORPTION SITE DETERMINATION OF HYDROGEN IN THE SYSTEMc(1×1)H/Rh(311)EMPLOYINGHe-DIFFRACTION
by R. Apel & D. Farías & K.H. Rieder - 159-164 Modification Of The Electrical Resistance Of Thin Cobalt Films Upon The Adsorption Of Carbon Monoxide
by A.L. Cabrera & W.H. Garrido-Molina & U.G. Volkmann - 165-169 Xps Studies Of The Stability Of A Mixed Zirconium Oxide And Sulphide Thin Film
by P.C. Wong & Y.S. Li & M.Y. Zhou & K.A.R. Mitchell - 171-176 STRUCTURAL ANALYSIS OF THE INITIAL INTERACTION BETWEEN OXYGEN AND A CLEANSi(100)BY TIME OF FLIGHT AND RECOILING SPECTROSCOPY
by A. Bousetta & C.C. Hsu & Y. Wang - 177-181 Ap-Fim Investigation Of The Initial Stage Of Oxidation On The Surface Of Alloys
by D.G. Ren - 183-189 CHEMICAL RECONSTRUCTION OF THETiAl(010)SURFACE
by C.P. Wang & S.K. Kim & F. Jona & D.R. Strongin & B.-R. Sheu & P.M. Marcus - 191-196 THE EFFECT OF DEGRADATION OF DEPTH RESOLUTION ON THE INTERDIFFUSION DATA IN THIN POLYCRYSTALLINEAu-AgMULTILAYER FILMS
by Antoni Bukaluk - 197-201 Enhanced Screening Of Core Holes At Transition-Metal Surfaces
by M. Methfessel & D. Hennig & M. Scheffler - 203-217 POLARIZATION OF DIFFERENT INTERFACES OFRhANDAgSTUDIED BY RECURSION TECHNIQUES
by W. Hergert & P. Rennert & C. Demangeat & H. Dreyssé - 219-223 Influence Of A Tip/Sample Interaction On Scanning Tunneling Spectroscopy Data
by V.G. Zavodinsky & I.A. Kuyanov - 225-244 ANOMALOUS SURFACE CORE-LEVEL SHIFTS ONBeMETAL
by L.I. Johansson - 245-254 INTERFACIAL REACTION AND SURFACE STRUCTURES OF THEPb/Si(113)SYSTEM
by R.G. Zhao & Chuan Hu & W.S. Yang - 255-268 Eelfs And Exfas Electron Spectroscopies: A Combined Structural Investigation
by L. Lozzi & M. Passacantando & P. Picozzi & S. Santucci & M. De Crescenzi
1995, Volume 02, Issue 01
- 1-8 GROWTH OFGeONIn-ADSORBEDSi(111)SURFACES STUDIED BY UHV-REM
by H. Minoda & Y. Tanishiro & N. Yamamoto & K. Yagi - 9-24 Model Catalysts: From Extended Single Crystals To Supported Particles
by D.W. Goodman - 25-41 Modification Of Surface Structure By Spillover Species: Consequences In The Reaction Of Solids And Catalysis
by Bernard Delmon - 43-61 Surface Studies By Core-Excitation Reflection Electron Energy Loss Spectroscopy
by A.P. Hitchcock & T. Tyliszczak - 63-69 Multiple-Scattering Approach To Surface Exafs: Theory Versus Experiment
by J.J. Rehr - 71-79 Local Density Calculations For Large Systems Using Multiple Scattering Theory
by D.M.C. Nicholson & G.M. Stocks & Y. Wang & W.A. Shelton & Z. Szotek & W.M. Temmerman - 81-88 Low-Dimensional Electronic States At Metal Surfaces: Quantum Wells And Quantum Wires
by F.J. Himpsel - 89-101 EARLY STRUCTURAL STAGES OF METALLIC EPITAXY: THE MODEL CASE OFFe/Cu(100)
by K. Heinz & P. Bayer & S. Müller - 103-107 In Situstudies With Low-Energy Electron Microscopy
by Ruud M. Tromp - 109-126 Interactions At Metal/Oxide And Oxide/Oxide Interfaces Studied By Ultrathin Film Growth On Single-Crystal Oxide Substrates
by Robert J. Lad - 127-137 Waves On A Metal Surface And Quantum Corrals
by M.F. Crommie & C.P. Lutz & D.M. Eigler & E.J. Heller
1994, Volume 01, Issue 04
- 415-420 IMAGE-INDUCED SURFACE STATES AND RESONANCES AT Fe(110)
by Maziar Nekovee & John E. Inglesfield - 421-428 Probing Surfaces And Interfaces With Optical Techniques
by Dietrich R.T. Zahn - 429-433 FERMI LEVEL PINNING AT A SCHOTTKY BARRIER: Na ON GaAs(110) FROM THE LOW TO THE HIGH COVERAGE REGIME
by Martina Heinemann - 435-442 Nonlinear Effects In Adsorption And Reaction Dynamics At Surfaces: Kinetic Oscillations Under Scrutiny
by David A. King - 443-448 Second-Harmonic Generation At Surfaces
by Michele Cini - 449-455 Catalysis By Metals: From Extended Single Crystals To Small Clusters
by D.W. Goodman - 457-464 Structural Studies Of Molecular Adsorption At Surfaces Using Scanned-Energy Mode Photoelectron Diffraction
by D.P. Woodruff - 465-468 SEGREGATION EFFECTS IN THE OXYGEN/CYCLOHEXANE/Ni{111} COADSORPTION SYSTEM
by E. Cooper & R. Raval - 469-472 Separation Of Initial And Final State Contributions To Chemical Shifts In Terms Of A Potential Model
by R.J. Cole & P. Weightman - 473-476 DENSITY FUNCTIONAL AND QUASIPARTICLE CALCULATIONS ON THE GaAs(110) SURFACE
by S.J. Jenkins & G.P. Srivastava & J.C. Inkson - 477-479 SURFACE ENHANCEMENT OF 3d, 4d, AND 5dIMPURITY MOMENTS AT CuANDAg(00l)SURFACES
by V.S. Stepanyuk & P. Lang & K. Wildberger & R. Zeller & P.H. Dederichs - 481-484 REFLECTANCE ANISOTROPY OF THE GaAs(001) SURFACE
by S.J. Morris & J.M. Bass & D.I. Westwood & D.A. Woolf & C.C. Matthai & R.H. Williams & F. Reinhardt & J. Rumberg & K.C. Rose & W. Richter - 485-489 The Relationship Between Reflectance Anisotropy And Electron Diffraction In The Detection Of Reconstruction Changes Occurring At Iii-V Semiconductor Surfaces
by S.R. Armstrong & M.E. Pemble & A.G. Taylor & A.R. Turner & P.N. Fawcette & B.A. Joyce & J.H. Neave & J. Zhang - 491-494 FIRST-PRINCIPLES STUDY OFSnO2(110)
by I. Manassidis & M.J. Gillan - 495-499 ATOMIC GEOMETRY OF III-V SEMICONDUCTORS WITH BiOVERLAYERS
by A. Umerski & G.P. Srivastava - 501-503 DISSOCIATION OFO2ON Fe(110)
by G. Worthy & C. Cottrell & A. Wight & A. Hodgson - 505-507 A Temperature-Programed Desorption Study Of The Adsorption And Reactions Ofd2oon Single Crystal Silicon Surfaces
by M.C. Flowers & N.B.H. Jonathan & A. Morris & S. Wright - 509-512 HOMOEPITAXIAL GROWTH ON Cu(111) PROBED BY HELIUM ATOM SCATTERING
by P.C. Dastoor & J. Ellis & A. Reichmuth & H. Bullman & B. Holst & W. Allison - 513-516 ORDERED AND DISORDERED Sb-RICHInSb(100)SURFACES STUDIED BY STM
by T.S. JONES & C.F. McCONVILLE & F.M. LEIBSLE & N.V. RICHARDSON - 517-520 THE GROWTH MODES AND STRUCTURES OF NO ON Ni{111}
by L.D. Mapledoram & A. Wander & D.A. King - 521-523 SURFACE ANISOTROPY OF SECOND HARMONIC GENERATION AT Al(111)
by A.V. Petukhov & A. Liebsch - 525-527 A Synchrotron Radiation Study Of Electronic And Magnetic Properties Of Supported Ultrasmall Manganese Particles
by A.M. Keen & S.H. Baker & C.R. Binns & S.N. Mozley & C. Norris & H.S. Derbyshire - 529-534 On Structural Effects In Alkali-Oxygen Coadsorption Systems
by S.J. MURRAY & R. McGRATH & R.D. DIEHL - 535-538 POSSIBLE "HOT" MOLECULE DESORPTION BY ELECTRON STIMULATED DECOMPOSITION OF DIHALOETHANES ON Cu(111)
by S. Turton & M. Kadodwala & Robert G. Jones - 539-543 THE Cl/Si(100) INTERFACE OBSERVED BY ESDIAD AND RELATED TECHNIQUES
by Q. Guo & D. Sterratt & E.M. Williams - 545-548 Xps Study Ofin Situcleaved Bscco
by T.-H. Shen & D. Greig & J.A.D. Matthew & G. Beamson & G. Balakrishnan & C.T. Lin & W.Y. Liang - 549-551 The Role Of Precursor States In Catalysis
by Michael Bowker - 553-555 THE INFLUENCE OF COADSORBATES (K, O) ON THE AUTOCATALYTIC DECOMPOSITION OF ACETIC ACID ON Rh{111}
by D.C. Papageorgopoulos & G. Hoogers & D.A. King - 557-559 Activated Adsorption Ofco2on Pure And Promoted Noble Metal Surfaces Observed With Raman Spectroscopy
by W. Akemann & A. Otto - 561-564 Dissociative Adsorption Of No And Reactions Ofno2on Rough Silver Surfaces
by F. Bartolucci & A. Otto - 565-568 EFFECTS OF SUB-MONOLAYER COVERAGES OF OXYGEN ON THE 4fLINESHAPES OF CERIUM COMPOUNDS
by R.I.R. Blyth & A.B. Andrews & A.J. Árko & J.J. Joyce & P.C. Canfield & Z. Fisk & U.G.L. Lahiase & L. Delong - 569-571 THE SURFACE STRUCTURE OF A LOW PdCu/Pd-(110) CRYSTAL ALLOY
by M. Bowker & M. Newton & S.M. Francis & M. Gleeson & C. Barnes - 573-576 Ellipsometric Studies Of Very Low Pressure Thermal Cvd Grown Silicon Nitride Thin Films Using Hydrazoic Acid And Dichlorosilane
by A.S. Bridges & R. Greef & N.B.H. Jonathan & A. Morris & G.J. Parker - 577-579 Arxps-Based Analysis Of Different Oxygen States Adsorbed At Silver Foil
by V.I. Bukhtiyarov & A.I. Boronin & O.A. Baschenko - 581-583 A COMPARATIVE STUDY OF THE SODIUM-PROMOTED OXIDATION AND NITRIDATION OFSi(100)-(2×1)USINGO2ANDN2MOLECULAR BEAMS
by T.L. Bush & T.S. Jones & D.O. Hayward - 585-588 Optical Second-Harmonic Generation From Porous Silicon In Uhv
by M. CAVANAGH & J.R. POWER & J.F. McGILP & H. MÜNDER & M.G. BERGER - 589-592 UPS, XPS, AES STUDIES OF TeTHIN FILMS DEPOSITED ON Si(100)2×1
by S. Di Nardo & L. Lozzi & M. Passacantando & P. Picozzi & S. Santucci - 593-596 THE DYNAMICS OF DEUTERIUM ADSORPTION ON Pt{100} AND THE ROLE OF ADSORBATE-INDUCED DEFECTS
by St. J. Dixon-Warren & A.T. Pasteur & D.A. King - 597-600 TEMPERATURE-DEPENDENT GROWTH OF THENa/GaP(110)INTERFACE
by D.A. Evans & P. Bailey & J.M.C Thornton & S. D'Addato - 601-604 Feasibility Of Experiments With Circularly Polarised Light On Beamline 4.1 At The Srs
by P. Finetti & A.W. Robinson & G. Thornton & S. D'Addatq - 605-609 The Effect Of Surface Temperature In The Fragmentation Ofh2at Surfaces
by G.A. Gates & S. Holloway - 611-614 STEP DYNAMICS ON VICINALAl(11{2m+1})SURFACES
by P.A. Gravil & S. Holloway - 615-620 THE PHOTODESORPTION OF NO FROM A PtSURFACE
by S. Harris & S. Holloway - 621-624 AN STM STUDY OF THE(2×4)ANDc(4×4)RECONSTRUCTIONS FORMED ON GaAs(001) BY MOLECULAR BEAM EPITAXY
by A.R. Avery & D.M. Holmes & T.S. Jones & B.A. Joyce - 625-629 COMBINED USE OF QUANTITATIVE LEED AND STM ONCu(100)-c(2×2)NSURFACES
by S.S. Dhesi & S.D. Barrett & A.W. Robinson & F.M. Leibsle - 631-634 A SURFACE X-RAY DIFFRACTION STUDY OF THE GROWTH OF ULTRATHIN LAYERS OF FeON Cu(001)
by M.A. James & C. Norris & C.L. Nicklin & R.G. Van Silfhout & P.B. Howes & T.S. Turner - 635-639 Dipole Activity And Polarisation Of Surface Phonons In Thin Ionic Films
by M.B. Lee & B.G. Frederick & G. Apai - 641-644 PHOTOEMISSION STUDIES OF THEPt3Cr(110)SURFACE
by R.B. Patel & A.J. Liddiard & M.D. Crapper - 645-648 IDENTIFYING THE NATURE OF ADSORBED PROPENE ON CuFILMS USING IR SPECTROSCOPY
by S. Munro & R. Raval - 649-653 POSSIBLE EVIDENCE FOR A VALENCE BAND SATELLITE IN PHOTOEMISSION SPECTRA FROM Sc(0001)
by A.J. Patchett & S.S. Dhesi & R.I.R. Blyth & S.D. Barrett - 655-660 INTERACTION AND REACTION OF CARBON MONOXIDE AND OXYGEN ON Ru(100) AND Ru(100)-Pd
by Stephen Poulston & Mintcho Tikhov & Richard M. Lambert - 661-664 THE ADSORPTION OF METHANOL ON WATER-PRECOVEREDNiO/Ni{110}
by H.E. Sanders & P. Gardner & D.A. King - 665-668 INFLUENCE OF ION IMPLANTATION ON THE SURFACE CHARACTERISTICS OF POLYCRYSTALLINE CdS LAYERS
by M. Al-Achkar & C.G. Scott - 669-672 STRUCTURAL AND ELECTRICAL STABILITY OF METAL CONTACTS TO MBE GROWN CdTeLAYERS
by P. Devine & G.W. Matthews & D. Sands & C.G. Scott & M. Yousaf & C.J. Blomfield & I.M. Dharmadasa & G.C. Gregory - 673-676 THE INTERACTION OF METHANOL WITH CLEAN AND OXYGEN-PRECOVEREDAg{111}: A RAIRS STUDY
by W.S. Sim & P. Gardner & D.A. King - 677-680 CHEMISORPTION OF Sb ON III-V(110) SURFACES
by G.P. Srivastava - 681-684 ELECTRONIC BAND STRUCTURES OFInAs(110)ANDInAs(110)Bi(1 ML)
by A. Umerski & G.P. Srivastava - 685-688 A New Study Of The Surface Electronic Structure Of W(001)
by Jeroen Van Hoof & John E. Inglesfield & Ian Collins - 689-692 ADSORPTION HEATS AND STICKING PROBABILITIES FOR CO ON POTASSIUM-PREDOSEDNi{110}
by C.E. Wartnaby & J.T. Stuckless & D.A. King - 693-696 DISSOCIATIVE CHEMISORPTION OFH2(D2)AT Fe(110)
by A. Wight & A. Hodgson & G. Worthy & D. Butler & B.E. Hayden - 697-700 The Probing Of Lewis Acidity In Zeolites With Molecular Hydrogen
by V.L. Zholobenko & J. Dwyer - 701-704 Characterisation Of Interfacial Bonding And Photochemistry In Self-Assembled Thiol Monolayers On Gold Using Nexafs And Arups
by H. Rieley & N.J. Price & R.G. White & R.I.R. Blyth & L. Håkansson & A.W. Robinson - 705-708 STM STUDIES OF COEXISTING S-INDUCED STRUCTURES ON Cu(110)
by T.M. Parker & N.G. Condon & R. Lindsay & G. Thornton & F.M. Leibsle
1994, Volume 01, Issue 02n03
- 213-219 THEORETICAL EVIDENCE FOR UNUSUAL BONDING GEOMETRY AND PHASE TRANSITIONS OF NaON Al(001)
by C. Stampfl & J. Neugebauer & M. Scheffler - 221-227 ATOMIC STRUCTURE OFSi(113) 3×1-HBY DYNAMICAL LOW-ENERGY ELECTRON DIFFRACTION INTENSITY SPECTRA ANALYSIS
by H. Huang & S.Y. Tong & U. Myler & K. Jacobi - 229-237 EPITAXIAL GROWTH OF AuON Pt(011) STUDIED WITH X-RAY PHOTOELECTRON DIFFRACTION
by A. Stuck & R. Fasel & J. Osterwalder & L. Schlapbach - 239-252 Monte Carlo Simulation Of The Critical Properties Of Quasi-Two-Dimensional Quantum Heisenberg Systems
by I.V. Rojdestvenski & M.G. Cottam & I.A. Favorski & T. Kuznetsova & P.N. Vorontsov-Velyaminov - 253-260 Dynamical Effects In Reflection High-Energy Electron Diffraction Intensity Oscillations
by T.C. ZHAO & A. IGNATIEV & S.Y. Tong - 261-271 Determination Of Linear-Chain Multiple Bound State Resonances In Reflection High-Energy Electron Diffraction
by T.C. Zhao & S.Y. Tong & A. Ignatiev - 273-284 NONEMPIRICAL CLUSTER STUDY OF THE AuADSORPTION ON THE Si(111) SURFACE
by N.V. Dobrodey & L.I. Ziegelman & V.G. Zavodinsky & I.A. Kuyanov - 285-293 LEED-AES STUDY OF SURFACE STRUCTURES FORMED AT COADSORPTION OF AlAND SbON (100), (111), AND (110) SiSURFACES
by A.V. Zotov & S.V. Ryzhkov & V.G. Lifshits & V.G. Duchinsky - 297-301 Imaging Surface Atomic Structure With Energy-Dependent Electron Diffraction
by J.G. Tobin & G.D. Waddill - 303-318 Surface Crystallography By Inverting Diffraction Spectra
by S.Y. Tong & Hua Li & H. Huang - 319-334 HOLOGRAPHIC INVERSION OF DIFFUSE ELECTRON DIFFRACTION INTENSITIES FOR THE Ni(001)/K STRUCTURE
by K. Heinz & H. Wedler - 335-358 A New Direct Surface Structural Probe: Inversion Of Measured Kikuchi Electron Patterns
by C.M. Wei & I.H. Hong & Y.C. Chou - 359-368 The Si(111)$\sqrt 3 \times \sqrt 3 $SURFACES FORMED BY THE ADSORPTION OF GROUP-III, IV, AND V METALS
by S. Kono - 369-393 ELECTRONIC STRUCTURE OF THE Si(111)$\sqrt 3 \times \sqrt 3 $SURFACES WITH GROUP-III, IV, AND V ADATOMS
by H. Nagayoshi - 395-410 $\sqrt 3 \times \sqrt 3 $RECONSTRUCTIONS OF Si(111) STUDIED BY SCANNING TUNNELING MICROSCOPY
by Jun Nogami - 411-411 Erratum: Films in Tetragonal States Produced by Epitaxial Strain
by P. M. Marcus & F. Jona
1994, Volume 01, Issue 01
- 1-7 FORMATION OF$\sqrt {21} \times \sqrt {21} $STRUCTURE BY GOLD DEPOSITION ON${\rm{Si}}\left( {111} \right)\sqrt 3 \times \sqrt 3\mbox{-}{\rm{Ag}}$SURFACE AND THE WAVERING BEHAVIOR
by A. Ichimiya & H. Nomura & Y. Horio & T. Sato & T. Sueyoshi & M. Iwatsuki - 9-13 ANOTHER UNUSUAL ADSORPTION SITE FOR ALKALI ADSORPTION ON A METAL, FOUND BY AUTOMATED TENSOR LEED ON A NOTEBOOK COMPUTER: ${\rm{Rh}}\left( {111} \right) - \left( {\sqrt 3 \times \sqrt 3 } \right)R30^ \circ -{\rm{Na}}$
by M.A. Van Hove - 15-21 Films In Tetragonal States Produced By Epitaxial Strain
by P.M. Marcus & F. Jona - 23-36 Spin Waves In Bilayer Ising-Model Systems In A Transverse Field
by A. Salman & M.G. Cottam - 37-45 EFFECTS OF IRRADIATION BY ELECTRON BEAM OF 200 keV ON MELT-TEXTURED GROWTH YBCO AND BSCCO SUPERCONDUCTING FILMS OF 80nmTHICKNESS
by P.C.W. Fung & J.C.L. Chow - 47-49 Scattering From Surfaces
by D.L. Mills & E. Burstein - 51-65 Surface Structural Research With Atom Beam Diffraction: Helium Versus Neon
by K.H. Rieder - 67-74 Role Of The He Atom Surface Potential On The Cu(001) Phonon Determination
by A. Franchini & G. Santoro & V. Bortolani & A. Bellman & D. Cvetko & L. Floreano & A. Morgante & M. Peloi & F. Tommasini & T. Zambelli - 75-88 THE Au(110)(2×1)SURFACE PHASE DIAGRAM AND(2×1)ORDERING AFTER GROWTH
by L. Barbier & B. Salanon & J. Sprösser - 89-96 Spin-Polarized Electron Energy Loss Spectroscopy
by H. Hopster - 97-107 The Structure And Lattice Dynamics Of Unreconstructed Fcc (001) And (111) Metal Surfaces
by S.Y. Tong & Y. Chen & K.P. Bohnen & T. Rodach & K.M. Ho - 109-114 EFFECT OFvan derWAALS FORCES ON ATOM-SURFACE SCATTERING
by Andrea C. Levi & Daniele Passerone - 115-127 Can We "Measure" A Potential Energy Surface For A Gas-Surface System?
by S. Holloway & G.R. Darling - 129-132 Quantum Mechanics Of Sticking
by W. Kohn - 133-156 Evolution Operator And Energy Spectrum Of A Quasiclassical Particle Interacting With Bosons: Application To Atom Surface Scattering
by Branko Gumhalter & Burke Kieron & David C. Langreth - 157-173 Rotational Rainbow Scattering Of Oriented Molecules
by Aart W. Kleyn - 175-185 Probing Surface Lattice Dynamics With Hyperthermal Ion Scattering
by David M. Goodstein & Christopher A. Dirubio & Barbara H. Cooper & Kieron Burke - 187-196 Sticking In The Physisorption Well: H2andd2on Copper
by M. Persson & S. Andersson - 197-210 Atomic Level Studies Of The Dynamics And Dynamical Behavior Of Solid Surfaces
by Tien T. Tsong & Rong-Li Lo & Tien-Chih Chang & Chonglin Chen
0000, Volume 25, Issue 07
- 1-8 EVALUATION ON THE THERMAL AND STRUCTURAL PROPERTIES OF COPPER ALUMINUM OXIDE (Cu-Al2O3) THIN FILM ON AL SUBSTRATE: EFFECT OF ANNEALING TEMPERATURE
by Wei Qiang Lim & Subramani Shanmugan & Mutharasu Devarajan - 1-9 Understanding The Effect Of Depressor On The Tio2 Compact Layer For The Photocurrent Performance Of Perovskite Solar Cells
by Chenchen Jia & Min Che & Lei Zhu