Publications (79)
Valley-Polarized quantum Hall phase in a strain-controlled Dirac system
G. Krizman, J. Bermejo-Ortiz, T. Zakusylo +9
In multivalley systems, the valley pseudospin offers rich physics going from encoding of information by its polarization (valleytronics), to exploring novel phases of matter when i…
Spontaneous Breaking of the SU(3) Flavor Symmetry in a Quantum Hall Valley Nematic
G. Krizman, A. Kazakov, C. -W. Cho +10
Two-dimensional quantum materials can host original electronic phases that arise from the interplay of electronic correlations, symmetry and topology. In particular, the spontaneou…
Studying the Underlying Event in Drell-Yan and High Transverse Momentum Jet Production at the Tevatron
The CDF Collaboration, T. Aaltonen, J. Adelman +576
We study the underlying event in proton-antiproton collisions by examining the behavior of charged particles (transverse momentum pT > 0.5 GeV/c, pseudorapidity |η| < 1) produced…
Search for a low mass Standard Model Higgs boson in the tau-tau decay channel in collisions at = 1.96 TeV
CDF Collaboration, T. Aaltonen, B. Alvarez Gonzalez +513
We report on a search for the standard model Higgs boson decaying into pairs of tau leptons in collisions produced by the Tevatron at = 1.96 TeV. The analyzed…
The X(3872) at CDF II
G. Bauer
Last year's X(3872) discovery was confirmed with the CDF II detector in pbarp collisions. We measure its mass to be . The source of X-mesons in the l…
Magnetic interactions in EuTe epitaxial layers and EuTe/PbTe superlattices
H. Kepa, G. Springholz, T. M. Giebultowicz +7
The magnetic properties of antiferromagnetic (AFM) EuTe epitaxial layers and short period EuTe/PbTe superlattices (SLs), grown by molecular beam epitaxy on (111) BaF substrates…
Interaction effects at the magnetic-field induced metal-insulator transition in Si/SiGe superlattices
G. Brunthaler, T. Dietl, A. Prinz +7
A metal-insulator transition was induced by in-plane magnetic fields up to 27 T in homogeneously Sb-doped Si/SiGe superlattice structures. The localisation is not observed for perp…
Reply to Comment (cond-mat/0311174)
V. M. Pudalov, M. E. Gershenson, H. Kojima +2
We demonstrate that the experimental data on the temperature dependence of the resistivity and conductivity for high-mobility Si-MOS structures, obtained for a wide range of densit…
Embedded magnetic phases in (Ga,Fe)N: the key role of growth temperature
A. Navarro-Quezada, W. Stefanowicz, Tian Li +9
The local chemistry, structure, and magnetism of (Ga,Fe)N nanocomposites grown by metal organic vapor phase epitaxy is studied by high resolution synchrotron x-ray diffraction and…
Exclusion of quantum coherence as the origin of the 2D metallic state in high-mobility silicon inversion layers
G. Brunthaler, A. Prinz, G. Bauer +1
The temperature and density dependence of the phase coherence time in high-mobility silicon inversion layers was determined from the magnetoresistivity due to weak localiza…
Observation of the rare decay from the combined analysis of CMS and LHCb data
The CMS, LHCb Collaborations, : +2807
A joint measurement is presented of the branching fractions and in proton-proton collisions at the LHC by the CMS and LHCb experiments. The data…
Mass Transfer Through Vapor-Liquid Interfaces From Hydrodynamic Density Functional Theory
B. Bursik, F. Bender, R. Stierle +2
We assess the capabilities of hydrodynamic density functional theory (DFT) to predict mass transfer across vapor-liquid interfaces by studying the response of an initially equilibr…
Valley Splitting in Si-Inversion Layers at Low Magnetic Fields
V. M. Pudalov, A. Punnoose, G. Brunthaler +2
We report novel manifestation of the valley splitting for the two valley electron system in (100) Si-inversion layers at low carrier density. We found that valley splitting causes…
Measurement of the Mass Difference Between Top and Anti-top Quarks at CDF
T. Aaltonen, B. Alvarez Gonzalez, S. Amerio +512
We present a measurement of the mass difference between top () and anti-top () quarks using candidate events reconstructed in the final state with one lepton…
The X(3872) at the Tevatron
G. Bauer
I report results on the X(3872) from the Tevatron. Mass and other properties have been studied, with a focus on new results on the dipion mass spectrum in X -> J/PsiPi^+Pi^- decays…
Interband absorption edge in topological insulators Bi(TeSe)
A. Dubroka, O. Caha, M. HronÄek +7
We have investigated the optical properties of thin films of topological insulators BiTe, BiSe and their alloys Bi(TeSe) on BaF su…
Positioning of self-assembled Ge islands on stripe-patterned Si (001) substrates
Zhenyang Zhong, A. Halilovic, M. Muhlberger +2
Self-assembled Ge islands were grown on stripe-patterned Si (001) substrates by solid source molecular beam epitaxy. The surface morphology obtained by atomic force microscopy (AFM…
Miniband engineering and topological phase transitions in topological - normal insulator superlattices
G. Krizman, B. A. Assaf, G. Bauer +3
Periodic stacking of topologically trivial and non-trivial layers with opposite symmetry of the valence and conduction bands induces topological interface states that, in the stron…
Search for New Dielectron Resonances and Randall-Sundrum Gravitons at the Collider Detector at Fermilab
T. Aaltonen, B. Alvarez Gonzalez, S. Amerio +511
A search for new dielectron mass resonances using data recorded by the CDF II detector and corresponding to an integrated luminosity of 5.7/fb is presented. No significant excess o…
Mn-rich MnSb2Te4: A topological insulator with magnetic gap closing at high Curie temperatures of 45-50 K
S. Wimmer, J. Sánchez-Barriga, P. Küppers +18
Ferromagnetic topological insulators exhibit the quantum anomalous Hall effect that might be used for high precision metrology and edge channel spintronics. In conjunction with sup…
Search for a Higgs Boson in the Diphoton Final State in p-pbar Collisions at sqrt(s) = 1.96 TeV
CDF Collaboration, T. Aaltonen, B. Alvarez Gonzalez +512
A search for a narrow Higgs boson resonance in the diphoton mass spectrum is presented based on data corresponding to 7.0 fb^-1 of integrated luminosity from p-pbar collisions at s…
Maximum Metallic Conductivity in Si-MOS Structures
V. M. Pudalov, G. Brunthaler, A. Prinz +1
We found that the conductivity of the two-dimensional electron system in Si-MOS structures is limited to a maximum value, G_{max}, as either density increases or temperature decrea…
Observation of Weyl and Dirac fermions at smooth topological Volkov-Pankratov heterojunctions
J. Bermejo-Ortiz, G. Krizman, R. Jakiela +6
Weyl and Dirac relativistic fermions are ubiquitous in topological matter. Their relativistic character enables high energy physics phenomena like the chiral anomaly to occur in so…
Negative longitudinal magnetoresistance from anomalous N=0 Landau level in topological materials
B. A. Assaf, T. Phuphachong, E. Kampert +8
Negative longitudinal magnetoresistance (NLMR) is shown to occur in topological materials in the extreme quantum limit, when a magnetic field is applied parallel to the excitation…
Global solutions to the electrodynamic two-body problem on a straight line
G. Bauer, D. -A. Deckert, D. Dürr +1
The classical electrodynamic two-body problem has been a long standing open problem in mathematics. For motion constrained to the straight line, the interaction is similar to that…
Search for the Higgs boson in the all-hadronic final state using the full CDF data set
CDF Collaboration, T. Aaltonen, B. Alvarez Gonzalez +513
This paper reports the result of a search for the standard model Higgs boson in events containing four reconstructed jets associated with quarks. For masses below 135GeV/c2, Higgs…
Search for a Heavy Top-Like Quark in p\bar{p} Collisions at {\surd}s = 1.96 TeV
CDF Collaboration, T. Aaltonen, B. Ãlvarez Gonzálezv +512
We present the results of a search for pair production of a heavy top-like (t') quark decaying to Wq final states using data corresponding to an integrated luminosity of 5.6 fb-1 c…
On Irreversibility and Radiation in Classical Electrodynamics of Point Particles
G. Bauer, D. -A. Deckert, Detlef Dürr +1
The direct interaction theory of electromagnetism, also known as Wheeler-Feynman electrodynamics, is often misinterpreted and found unappealing because of its reference to the abso…
Controlled aggregation of magnetic ions in a semiconductor. Experimental demonstration
A. Bonanni, A. Navarro-Quezada, Tian Li +8
The control on the distribution of magnetic ions into a semiconducting host is crucial for the functionality of magnetically doped semiconductors. Through a structural analysis at…
Weak anisotropy and disorder dependence of the in-plane magnetoresistance in high mobility (100) Si-inversion layers
V. M. Pudalov, G. Brunthaler, A. Prinz +1
We report studies of the magnetoresistance (MR) in a two-dimensional electron system in (100) Si-inversion layers, for perpendicular and parallel orientations of the current with r…
On the Existence of Dynamics of Wheeler-Feynman Electromagnetism
G. Bauer, D. -A. Deckert, D. Dürr
We study the equations of Wheeler-Feynman electrodynamics which is an action-at-a-distance theory about world-lines of charges that interact through their corresponding advanced an…
Measurement of the CP-violation parameter sin(2beta) in B0 to J/psi-Kshort decays
G. Bauer
A sample of 400 decays collected in collisions by the CDF detector is used to directly measure the CP-violation parameter …
Weak-localization type description of conduction in the "anomalous" metallic state
B. L. Altshuler, G. W. Martin, D. L. Maslov +4
This paper is devoted to the temperature dependence of the resistivity in Si- MOS samples over the wide range of densities in the ``metallic phase'' (n>n_c) but not too close to th…
Search for new phenomena in events with two bosons and missing transverse momentum in collisions at TeV
T. Aaltonen, B. Alvarez Gonzalez, S. Amerio +512
We present a search for new phenomena in events with two reconstructed bosons and large missing transverse momentum, sensitive to processes $p\bar{p}\rightarrow X_2X_2 \rightar…
Maxwell-Lorentz Dynamics of Rigid Charges
G. Bauer, D. -A. Deckert, D. Dürr
We establish global existence and uniqueness of the dynamics of classical electromagnetism with extended, rigid charges and fields which need not to be square integrable. We consid…
Weak localization in the 2D metallic regime of Si-MOS
G. Brunthaler, A. Prinz, G. Bauer +5
The negative magnetoresistance due to weak localization is investigated in the two-dimensional metallic state of Si-MOS structures for high conductance values between 35 and 120 e^…
Spin-induced optical second harmonic generation in the centrosymmetric magnetic semiconductors EuTe and EuSe
B. Kaminski, M. Lafrentz, R. V. Pisarev +9
Spectroscopy of the centrosymmetric magnetic semiconductors EuTe and EuSe reveals spin-induced optical second harmonic generation (SHG) in the band gap vicinity at 2.1-2.4eV. The m…
Time-dependent Effects in the Metallic Phase in Si-MOS: Evidence for Non-Diffusive Transport
V. M. Pudalov, G. Brunthaler, A. Prinz +2
We have found that the conduction in Si-MOS structures has a substantial imaginary component in the metallic phase for the density range 6 \times n_c > n > n_c, where n_c is the cr…
Avoided level crossing at the magnetic field induced topological phase transition due to spin-orbital mixing
G. Krizman, B. A. Assaf, M. Orlita +7
In 3D topological insulators, an effective closure of the bulk energy gap with increasing magnetic field expected at a critical point can yield a band crossing at a gapless Dirac n…
Nonmagnetic band gap at the Dirac point of the magnetic topological insulator (BiMnSe
J. Sánchez-Barriga, A. Varykhalov, G. Springholz +17
Magnetic doping is expected to open a band gap at the Dirac point of topological insulators by breaking time-reversal symmetry and to enable novel topological phases. Epitaxial (Bi…
Weak Field Hall Resistance and Effective Carrier Density Through Metal-Insulator Transition in Si-MOS Structures
V. M. Pudalov, G. Brunthaler, A. Prinz +1
We studied the weak field Hall voltage in 2D electron layers in Si-MOS structures with different mobilities, through the metal-insulator transition. In the vicinity of the critical…
Search for First-Generation Scalar Leptoquarks in collisions at =1.96 TeV
The CDF Collaboration, D. Acosta, J. Adelman +626
We report on a search for pair production of first-generation scalar leptoquarks () in collisions at =1.96 TeV using an integrated luminosity of 203 $pb^{…
The low-density spin susceptibility and effective mass of mobile electrons in Si inversion layers
V. M. Pudalov, M. E. Gershenson, H. Kojima +5
We studied the Shubnikov-de Haas (SdH) oscillations in high-mobility Si-MOS samples over a wide range of carrier densities cm, which includes…
Search for WZ+ZZ production with MET + jets with b enhancement at sqrt(s) = 1.96 TeV
CDF Collaboration, T. Aaltonen, B. Ãlvarez Gonzálezv +513
Diboson production () has been observed at the Tevatron in hadronic decay modes dominated by the process. This paper describes the measurement of the cross section o…
Search for Standard Model Higgs Boson Production in Association with a W Boson at CDF
T. Aaltonen, B. Ãlvarez González, S. Amerio +498
We present a search for the standard model Higgs boson production in association with a boson in proton-antiproton collisions ($p\bar{p}\rightarrow W^\pm H \rightarrow \ellνb\…
Measurement of the Top Pair Production Cross Section in the Lepton + Jets Channel Using a Jet Flavor Discriminant
T. Aaltonen, B. Alvarez Gonzalez, S. Amerio +513
We present a new method to measure the top quark pair production cross section and the background rates with 2.7 fb of data from collisions at Te…
Mixing and CP-Violation Measurements of Mesons from the Tevatron Collider
G. Bauer
mixing measurements from the Tevatron Run I data are reported. These include time-integrated measurements of the average mixing parameter , six time-dependent oscilla…
Large magnetic gap at the Dirac point in a Mn-induced BiTe heterostructure
E. D. L. Rienks, S. Wimmer, P. S. Mandal +15
Magnetically doped topological insulators enable the quantum anomalous Hall effect (QAHE) which provides quantized edge states for lossless charge transport applications. The edge…
Electronic band structure of Sb2Te3
I. Mohelsky, J. Wyzula, F. Le Mardele +11
Here we report on Landau level spectroscopy of an epitaxially grown thin film of the topological insulator Sb2Te3, complemented by ellipsometry and magneto-transport measurements.…
Strain determination in the Si channel above a single SiGe island inside a field effect transistor using nanobeam x-ray diffraction
N. Hrauda, J. J. Zhang, E. Wintersberger +9
SiGe islands are used to induce tensile strain in the Si channel of Field Effect Transistors to achieve larger transconductance and higher current driveabilities. We report on x-ra…
Effect of the In-Plane Magnetic Field on Conduction of the Si-inversion Layer: Magnetic Field Driven Disorder
V. M. Pudalov, G. Brunthaler, A. Prinz +1
We compare the effects of temperature, disorder and parallel magnetic field on the metallic-like temperature dependence of the resistivity. We found a similarity between the effect…
Measurement of Delta-md Using a Probability Based Same-Side Tagger at CDF
G. Bauer
A measurement of Delta m_d is performed using inclusive lepton+vertex events at CDF. A probability based Same-Side Tagger was developed to tag the initial b-flavor of the B^0_d, wh…
Interaction Effects in Conductivity of Si Inversion Layers at Intermediate Temperatures
V. M. Pudalov, M. E. Gershenson, H. Kojima +3
We compare the temperature dependence of resistivity Ï(T) of Si MOSFETs with the recent theory by Zala et al. This comparison does not involve any fitting parameters: the effectiv…
Logarithmic Temperature Dependence of the Conductivity and Lack of Universal One-Parameter Scaling in the Two-Dimensional Metal
V. M. Pudalov, G. Brunthaler, A. Prinz +1
We show that the two-dimensional metallic state in Si-MOS samples persists over a wide range of temperatures (16 mK to 8 K), sample peak mobilities (varying by a factor of 8), carr…
Contact superconductivity in In-PbTe junctions
G. Grabecki, K. A. Kolwas, J. Wrobel +7
The authors report on electron transport studies on superconductor-semiconductor hybrid structures of indium and n-type lead telluride, either in the form of quantum wells or bulk…
The X(3872) Meson and "Exotic" Spectroscopy at CDF II
G. Bauer
A spate of remarkable new hadrons reported in 2003 may lead to unequivocal proof of states beyond conventional and structure. Claimed baryonic states Theta+, Phi,…
CDF B spectroscopy results: B^** and B_c
G. Bauer
We report on two spectroscopy results from CDF. First, we observe the orbitally excited mesons in events. We find % of light meso…
Landau level spectroscopy of BiTe
I. Mohelsky, A. Dubroka, J. Wyzula +9
Here we report on Landau level spectroscopy in magnetic fields up to 34 T performed on a thin film of topological insulator BiTe epitaxially grown on a BaF substrate. T…
An inclusive search for the Higgs boson in the four-lepton final state at CDF
T. Aaltonen, B. Alvarez Gonzalez, S. Amerio +512
An inclusive search for the standard model Higgs boson using the four-lepton final state in proton-antiproton collisions produced by the Tevatron at sqrt(s) = 1.96 TeV is conducted…
Measurement of the top-quark mass in the lepton+jets channel using a matrix element technique with the CDF II detector
CDF Collaboration, T. Aaltonen, B. Ãlvarez Gonzálezv +512
A measurement of the top-quark mass is presented using Tevatron data from proton-antiproton collisions at center-of-mass energy TeV collected with the CDF II detect…
Comparison of Three-jet Events in Proton-Antiproton Collisions at Center-of-mass Energy 1.8 TeV to Predictions from a Next-to-leading Order QCD Calculation
D. Acosta, T. Affolder, M. G. Albrow +410
The properties of three-jet events with total transverse energy greater than 320 GeV and individual jet energy greater than 20 GeV have been analyzed and compared to absolute predi…
Nonmonotonic Temperature Dependence of the Hall Resistance for 2D Electron System in Si
A. Yu. Kuntsevich, D. A. Knyazev, V. I. Kozub +3
Weak field Hall resistance Rxy(T) of the 2D electron system in Si was measured over the range of temperatures 1-35 K and densities, where the diagonal resistivity exhibits a ``meta…
The CDFII Time-Of-Flight Detector and Impact on Beauty Flavor Tagging
C. Grozis, R. Kephart, R. Stanek +53
The new CDFII detector incorporates a Time-of-Flight detector (TOF), employing plastic scintillator bars and fine-mesh photomultipliers. Since August 2001 the TOF system has been f…
Measurement of ZZ production in leptonic final states at {\surd}s of 1.96 TeV at CDF
T. Aaltonen, B. Alvarez Gonzalez, S. Amerio +512
In this paper we present a precise measurement of the total ZZ production cross section in pp collisions at {\surd}s= 1.96 TeV, using data collected with the CDF II detector corres…
Absence of nonlocal resistance in microstructures of PbTe quantum wells
K. A. Kolwas, G. Grabecki, S. Trushkin +6
We report on experiments allowing to set an upper limit on the magnitude of the spin Hall effect and the conductance by edge channels in quantum wells of PbTe embedded between PbEu…
Excitation intensity dependence of photoluminescence spectra of SiGe quantum dots grown on prepatterned Si substrates: Evidence for biexcitonic transition
P. Klenovský, M. Brehm, V. KÅápek +7
The pumping intensity (I) dependence of the photoluminescence (PL) spectra of perfectly laterally two-dimensionally ordered SiGe quantum dots on Si(001) substrates was studied. The…
Measurement of branching ratio and Bs0 lifetime in the decay Bs0 -> J/psi f0(980) at CDF
CDF Collaboration, T. Aaltonen, B. Alvarez Gonzalez +512
We present a study of Bs0 decays to the CP-odd final state J/psi f0(980) with J/psi -> mu+ mu- and f0(980) -> pi+ pi-. Using ppbar collision data with an integrated luminosity of 3…
Effective potentials between gold nano crystals -- functional dependence on the temperature
G. Bauer, A. Lange, N. Gribova +2
A method is presented that allows to combine the effective potential between two nano crystals, the potential of mean force (PMF), as obtained from all-atomistic Molecular Dynamics…
Reply to Comment on "Weak anisotropy and disorder dependence of the in-plane magnetoresistance in high mobility (100) Si-inversion layers"
V. M. Pudalov, G. Brunthaler, A. Prinz +1
Reply to the Comment by V.T. Dolgopolov and A.V. Gold [cond-mat/0203276].
Tunable Dirac interface states in topological superlattices
G. Krizman, B. A. Assaf, T. Phuphachong +6
Relativistic Dirac fermions are ubiquitous in condensed matter physics. Their mass is proportional to the material energy gap and the ability to control and tune the mass has becom…
Instability of the Two-Dimensional Metallic Phase to Parallel Magnetic Field
V. M. Pudalov, G. Brunthaler, A. Prinz +1
We report on magnetotransport studies of the unusual two-dimensional metallic phase in high mobility Si-MOS structures. We have observed that the magnetic field applied in the 2D p…
Quantum ballistic transport in constrictions of n-PbTe
G. Grabecki, J. Wrobel, T. Dietl +7
Conductance of submicron constrictions of PbTe:Bi was studied up to 8T and between 4.2K and 50mK. The structures were fabricated by electron beam lithography and chemical etching o…
Disorder suppression and precise conductance quantization in constrictions of PbTe quantum wells
G. Grabecki, J. Wrobel, T. Dietl +7
Conductance quantization was measured in submicron constrictions of PbTe, patterned into narrow,12 nm wide quantum wells deposited between PbEuTe barriers. Becaus…
Reply to Comment on "Low-Density Spin Susceptibility and Effective Mass of Mobile Electrons in Si Inversion Layers"
V. M. Pudalov, M. Gershenson, H. Kojima +5
Reply to the Comment by S.V. Kravchenko, A.A. Shashkin, and V.T. Dolgopolov [cond-mat/0106056]
Search for Standard Model Higgs Boson Production in Association with a W Boson Using a Matrix Element Technique at CDF in p-bar{p} Collisions at sqrt{s} = 1.96 TeV
CDF Collaboration, T. Aaltonen, B. Alvarez Gonzalez +512
This paper presents a search for standard model Higgs boson production in association with a boson using events recorded by the CDF experiment in a dataset corresponding to an…
Massive and massless Dirac fermions in Pb1-xSnxTe topological crystalline insulator probed by magneto-optical absorption
B. A. Assaf, T. Phuphachong, V. V. Volobuev +5
Dirac fermions in condensed matter physics hold great promise for novel fundamental physics, quantum devices and data storage applications. IV-VI semiconductors, in the inverted re…
Photoemission of BiSe with Circularly Polarized Light: Probe of Spin Polarization or Means for Spin Manipulation?
J. Sánchez-Barriga, A. Varykhalov, J. Braun +12
Topological insulators are characterized by Dirac cone surface states with electron spins aligned in the surface plane and perpendicular to their momenta. Recent theoretical and ex…
Precision Top-Quark Mass Measurements at CDF
T. Aaltonen, B. Alvarez Gonzalez, S. Amerio +512
We present a precision measurement of the top-quark mass using the full sample of Tevatron TeV proton-antiproton collisions collected by the CDF II detector, corres…
Dirac parameters and topological phase diagram of Pb1-xSnxSe from magneto-spectroscopy
G. Krizman, B. A. Assaf, T. Phuphachong +4
Pb1-xSnxSe hosts 3D massive Dirac fermions across the entire composition range for which the crystal structure is cubic. In this work, we present a comprehensive experimental mappi…