physica status solidi (RRL) - Rapid Research Letters

Cover image for Vol. 5 Issue 1

January 2011

Volume 5, Issue 1

Pages A1–A22, 1–45

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Back Cover
    5. Editorials
    6. Contents
    7. NEW IN pss
    8. Conference calendar
    9. Reviews@RRL
    10. Rapid Research Letters
    11. Information for authors
    1. Cover Picture: Competing energy scales in high-temperature superconductors: Ultrafast pump–probe studies (Phys. Status Solidi RRL 1/2011)

      Elbert E. M. Chia, Jian-Xin Zhu, D. Talbayev and A. J. Taylor

      Version of Record online: 7 JAN 2011 | DOI: 10.1002/pssr.201190000

      Thumbnail image of graphical abstract

      The cover picture of this issue is related to the Review@RRL article by Elbert E. M. Chia et al. (pp. 1–9). The figure depicts the phase diagram of high-temperature superconductors, where the antiferromagnetic phase, pseudogap phase, and the superconducting phase emerge, and sometimes even coexist or compete with one another, at different hole dopings. When a pump pulse arrives at a sample from the top, the pump photon breaks Cooper pairs and creates quasiparticles. A probe pulse that arrives shortly after tracks the time evolution of the quasiparticle population. The curves of blue and red circles depict the pump–probe signal of the cuprate superconductor Tl-2223 below the Néel temperature TN. The signal has two opposite components, showing the coexistence of superconductivity and antiferromagnetism at low temperatures.

  2. Issue Information

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Back Cover
    5. Editorials
    6. Contents
    7. NEW IN pss
    8. Conference calendar
    9. Reviews@RRL
    10. Rapid Research Letters
    11. Information for authors
  3. Back Cover

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Back Cover
    5. Editorials
    6. Contents
    7. NEW IN pss
    8. Conference calendar
    9. Reviews@RRL
    10. Rapid Research Letters
    11. Information for authors
    1. Back Cover: Correlation between structure and optoelectronic properties in a two-dimensional nanoparticle assembly (Phys. Status Solidi RRL 1/2011)

      Markus A. Mangold, Martin A. Niedermeier, Monika Rawolle, Beate Dirks, Jan Perlich, Stephan V. Roth, Alexander W. Holleitner and Peter Müller-Buschbaum

      Version of Record online: 7 JAN 2011 | DOI: 10.1002/pssr.201190002

      Thumbnail image of graphical abstract

      In their Letter on pp. 16–18, Mangold et al. correlate the structural properties of nanoparticle arrays with their optical and optoelectronic response by combining advanced X-ray scattering techniques with optoelectronic characterization methods. The structure of two-dimensional (2D) hexagonal gold nanoparticle arrays is characterized using grazing-incidence small angle X-ray scattering (GISAXS). The cover image displays the 2D GISAXS data, the specular peak is blocked with a small beamstop. The diagram above shows a horizontal line cut from the 2D GISAXS data (circles) together with a simulation (solid line, data modelled using IsGISAXS software). Best modelling is obtained using a two-particle-type model as shown in the inset – spheroid particle type occurring with a probability of 98%, cylindrical particle type with 2% probability. Good agreement between data and simulation concerning the most prominent features is achieved. From the GISAXS pattern the size of the gold particles as well as the lattice spacing of the hexagonal assembly are obtained. Based upon these parameters the authors calculate the dielectric function. Furthermore, the absorption spectrum is deduced which closely follows the measured absorption and photoconductance spectrum.

  4. Editorials

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Back Cover
    5. Editorials
    6. Contents
    7. NEW IN pss
    8. Conference calendar
    9. Reviews@RRL
    10. Rapid Research Letters
    11. Information for authors
    1. You have free access to this content
      Editorial: Phys. Status Solidi RRL 1/2011 (pages A1–A10)

      Martin Stutzmann

      Version of Record online: 7 JAN 2011 | DOI: 10.1002/pssr.201150301

    2. You have free access to this content
      Editorial: Phys. Status Solidi RRL 1/2011 (pages A11–A12)

      Sabine Bahrs

      Version of Record online: 7 JAN 2011 | DOI: 10.1002/pssr.201150302

  5. Contents

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Back Cover
    5. Editorials
    6. Contents
    7. NEW IN pss
    8. Conference calendar
    9. Reviews@RRL
    10. Rapid Research Letters
    11. Information for authors
  6. NEW IN pss

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Back Cover
    5. Editorials
    6. Contents
    7. NEW IN pss
    8. Conference calendar
    9. Reviews@RRL
    10. Rapid Research Letters
    11. Information for authors
  7. Conference calendar

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Back Cover
    5. Editorials
    6. Contents
    7. NEW IN pss
    8. Conference calendar
    9. Reviews@RRL
    10. Rapid Research Letters
    11. Information for authors
  8. Reviews@RRL

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Back Cover
    5. Editorials
    6. Contents
    7. NEW IN pss
    8. Conference calendar
    9. Reviews@RRL
    10. Rapid Research Letters
    11. Information for authors
    1. You have free access to this content
      Competing energy scales in high-temperature superconductors: Ultrafast pump–probe studies (pages 1–9)

      Elbert E. M. Chia, Jian-Xin Zhu, D. Talbayev and A. J. Taylor

      Version of Record online: 30 NOV 2010 | DOI: 10.1002/pssr.201004371

      Thumbnail image of graphical abstract

      The complex pucomplexesle of phases that can exist, co-exist, or compete in strongly correlated electron materials is among the greatest opportunities for progressing our understanding of solids state physics today. With this Review@RRL we are pleased to introduce an article category that, in line with the focus of pss (RRL), aims at highlighting most recent new developments in a particularly active field. Here the authors explain the insight that time-resolved spectroscopy brought for the study of photoexcited quasiparticle dynamics, discussing examples of cuprate and pnictide high-temperature superconductors in regimes where different phases such as superconductivity, spin-density-wave and pseudogap phases coexist or compete with one another.

  9. Rapid Research Letters

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Back Cover
    5. Editorials
    6. Contents
    7. NEW IN pss
    8. Conference calendar
    9. Reviews@RRL
    10. Rapid Research Letters
    11. Information for authors
    1. Quasiparticle band structure and optical properties of NH3BH3 (pages 10–12)

      Ch. Bheema Lingam, K. Ramesh Babu, Surya P. Tewari, G. Vaitheeswaran and S. Lebègue

      Version of Record online: 2 NOV 2010 | DOI: 10.1002/pssr.201004432

      Thumbnail image of graphical abstract

      Ammonia borane (NH3BH3) is currently investigated as a potential material for reversible hydrogen storage. While the focus was mostly on phase transitions and ground state properties to date, this Letter presents the quasiparticle band structure of the low temperature orthorhombic phase of NH3BH3 obtained by using the GW approximation. The authors calculate the corresponding optical properties. It is found that NH3BH3 is a large band gap insulator, and shows a strong optical anisotropy.

    2. First-principles study of CrB4 as a high shear modulus compound (pages 13–15)

      Hong Bin Xu, Yuan Xu Wang and V. C. Lo

      Version of Record online: 18 NOV 2010 | DOI: 10.1002/pssr.201004437

      Thumbnail image of graphical abstract

      The authors perform a first-principles study of synthesized CrB4, showing that its shear modulus is higher than that of superhard WB4, and also larger than its bulk modulus. Boron atoms in CrB4 form a strong covalent cage, which dramatically increases its mechanical strength. The appearance of a pseudogap near the Fermi level indicates that CrB4 is a stable compound.

    3. Correlation between structure and optoelectronic properties in a two-dimensional nanoparticle assembly (pages 16–18)

      Markus A. Mangold, Martin A. Niedermeier, Monika Rawolle, Beate Dirks, Jan Perlich, Stephan V. Roth, Alexander W. Holleitner and Peter Müller-Buschbaum

      Version of Record online: 10 NOV 2010 | DOI: 10.1002/pssr.201004424

      Thumbnail image of graphical abstract

      In this Letter the authors characterize the structure of a gold nanoparticle array using grazing-incidence small angle X-ray scattering (GISAXS). From the GISAXS pattern, they determine the structural properties such as the size of the gold particles and the lattice spacing of the hexagonal assembly. Based upon these parameters they calculate the absorption spectrum of the nanoparticle array. The measured absorption spectrum as well as the photoconductance closely follows the calculated absorption.

    4. Controlled growth of rutile TiO2 by atomic layer deposition on oxidized ruthenium (pages 19–21)

      Mihaela Popovici, Johan Swerts, Kazuyuki Tomida, Dunja Radisic, Min-Soo Kim, Ben Kaczer, Olivier Richard, Hugo Bender, Annelies Delabie, Alain Moussa, Christa Vrancken, Karl Opsomer, Alexis Franquet, Malgorzata A. Pawlak, Marc Schaekers, Laith Altimime, Sven Van Elshocht and Jorge A. Kittl

      Version of Record online: 18 NOV 2010 | DOI: 10.1002/pssr.201004462

      Thumbnail image of graphical abstract

      Compared to anatase, rutile TiO2 leads to superior electrical properties both in terms of equivalent oxide thickness and leakage current. It is shown that O3 is needed during atomic layer deposition to obtain rutile TiO2, but leads to etching of the underlaying Ru. In this Letter, the authors demonstrate how the use of a H2O based TiO2 interlayer can be applied to deposit rutile TiO2 uniformly over 300 mm RuO2/Ru/TiN/Si substrates.

    5. Excellent Si surface passivation by low temperature SiO2 using an ultrathin Al2O3 capping film (pages 22–24)

      G. Dingemans, M. C. M. van de Sanden and W. M. M. Kessels

      Version of Record online: 17 NOV 2010 | DOI: 10.1002/pssr.201004378

      Thumbnail image of graphical abstract

      Dingemans et al. demonstrate an unparalleled high level of silicon surface passivation by SiO2 synthesized at low temperatures. This result was obtained by the application of an ultrathin atomic layer deposited Al2O3 capping layer and subsequent annealing. The effective hydrogenation under influence of the Al2O3 capping layer leads to very low defect densities at the Si/SiO2 interface. These results may be beneficial for next-generation solar cells.

    6. Dynamic photoluminescence lifetime imaging for the characterisation of silicon wafers (pages 25–27)

      Sandra Herlufsen, Klaus Ramspeck, David Hinken, Arne Schmidt, Jens Müller, Karsten Bothe, Jan Schmidt and Rolf Brendel

      Version of Record online: 28 OCT 2010 | DOI: 10.1002/pssr.201004426

      Thumbnail image of graphical abstract

      As another interesting application of camera-based photoluminescence imaging, the Letter presents a dynamic photoluminescence lifetime technique. The carrier lifetime is determined from the time-dependent luminescence emission after optical excitation. The authors calculate a ratio of data acquired at different points of time, demonstrating that it depends only on the camera integration time and the effective carrier lifetime. The latter is thus unambiguously determined without need for additional wafer parameters. With the demonstrated approach, it is possible to examine contact-free the electronic quality of crystalline silicon prior to solar cell production.

    7. Stress-enhanced dislocation density reduction in multicrystalline silicon (pages 28–30)

      M. I. Bertoni, D. M. Powell, M. L. Vogl, S. Castellanos, A. Fecych and T. Buonassisi

      Version of Record online: 9 NOV 2010 | DOI: 10.1002/pssr.201004344

      Thumbnail image of graphical abstract

      This Letter demonstrates that stress plays a role in changing the local pre-exisiting dislocation density in multicrystalline silicon (mc-Si) at high temperatures. In samples with pre-existing dislocations, a high-temperature annealing in combination with large local stresses is observed to increase the local dislocation density, while small stresses – from applied loads or residual stress – lead to a significant reduction. It is concluded that stress should be viewed as an engineering tool to manipulate the local densities of dislocations in mc-Si, either during crystal growth or in a re-annealing step.

    8. Phase-matching properties of BaGa4S7 and BaGa4Se7: Wide-bandgap nonlinear crystals for the mid-infrared (pages 31–33)

      Valeriy Badikov, Dmitrii Badikov, Galina Shevyrdyaeva, Aleksey Tyazhev, Georgi Marchev, Vladimir Panyutin, Valentin Petrov and Albert Kwasniewski

      Version of Record online: 2 NOV 2010 | DOI: 10.1002/pssr.201004425

      Thumbnail image of graphical abstract

      Nonlinear non-oxide crystals are needed for frequency down-conversion of powerful laser sources operating in the 1 μm spectral range into the mid-IR above 5 μm. If their bandgap is wider this helps to avoid two-photon absorption at the shortest (pump) wavelength. In this Letter, a mixed Russian–German team describes the growth of BaGa4S7 and BaGa4Se7, which exhibit wide bandgaps and transparency in the visible. The Letter presents results on the measured index of refraction and calculated phase-matching capabilities. Both compounds possess attractive properties for phase-matched nonlinear frequency conversion.

    9. Modulation of the ferromagnetic insulating phase in Pr0.8Ca0.2MnO3 by Co substitution (pages 34–36)

      T. Harada, I. Ohkubo, M. Lippmaa, Y. Matsumoto, M. Sumiya, H. Koinuma and M. Oshima

      Version of Record online: 30 NOV 2010 | DOI: 10.1002/pssr.201004467

      Thumbnail image of graphical abstract

      It is important to clarify the origin of the ferromagnetic insulating phase in mixed-valent perovskites in order to design functional materials such as multiferroics. A detailed study given in this Letter on the effect of Co substitution on structural, magnetic, and transport properties of Pr0.8Ca0.2MnO3 revealed that the ferromagnetic insulating phase in Pr0.8Ca0.2Mn1–yCoyO3 originates from both double exchange and superexchange interactions which can be modulated by controlling the Mn/Co ratio in B-sites.

    10. High vertical breakdown strength in with low specific on-resistance AlGaN/AlN/GaN HEMTs on silicon (pages 37–39)

      S. Arulkumaran, S. Vicknesh, G. I. Ng, Z. H. Liu, S. L. Selvaraj and T. Egawa

      Version of Record online: 2 DEC 2010 | DOI: 10.1002/pssr.201004465

      Thumbnail image of graphical abstract

      The authors achieved an off-state breakdown voltage (BVgd) of 305 V with low specific on-resistance (RDS[ON]) of 0.45 mΩ cm2 in AlGaN/AlN/GaN high-electron-mobility transistors (HEMTs) on Si. The figure of merit (FOM = BVgd2/RDS[ON]) is as high as 2.0 × 108 V2Ω–1cm–2, the highest among the reported values for GaN HEMTs on Si. Record high vertical breakdown (VB) strength of 4.2 MV/cm has been achieved on the 1.2 μm thick buffer GaN/AlN layer grown on Si. The observation of high VB strength is due to the high quality of this layer, with reduced threading dislocations, which has been confirmed by TEM.

    11. Luminescence and scintillation of Eu2+-doped high silica glass (pages 40–42)

      W. Chewpraditkul, D. Chen, B. Yu, Q. Zhang, Y. Shen, M. Nikl, R. Kucerkova, A. Beitlerova, C. Wanarak and A. Phunpueok

      Version of Record online: 8 DEC 2010 | DOI: 10.1002/pssr.201004477

      Thumbnail image of graphical abstract

      This Letter reports the luminescence and scintillation characteristics of Eu2+-doped high silica glass. The impregnation of Eu ions into nanoporous high silica glass and sintering at 1150 °Cfor 2 h in a CO reducing atmosphere produced the glass with an intense blue emission of Eu2+ ions under excitation with UV and X-rays. This glass showed high scintillation efficiency of about 120% of BGO scintillator. It appears to be slightly superior and comparable in terms of light output and energy resolution, respectively, for low energy spectrometry (<60 keV) of X- and gamma rays.

    12. Crystal growth and characterization of CsSr1–xEux I3 high light yield scintillators (pages 43–45)

      Kan Yang, Mariya Zhuravleva and Charles L. Melcher

      Version of Record online: 8 DEC 2010 | DOI: 10.1002/pssr.201004434

      Thumbnail image of graphical abstract

      This Letter reports on the single crystal growth and characterization of CsSr1–xEuxI3 as a new scintillation material. The highest absolute light yield was found for CsSr0.92Eu0.08I3, with 65,000 ph/MeV at 5.9% energy resolution using a 662 keV γ-ray source. This absolute light yield is about 8 times that of BGO and about 2 times that of LSO:Ce.

  10. Information for authors

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Back Cover
    5. Editorials
    6. Contents
    7. NEW IN pss
    8. Conference calendar
    9. Reviews@RRL
    10. Rapid Research Letters
    11. Information for authors

SEARCH

SEARCH BY CITATION