We present the most downloaded papers from the pss family of journals in January. This month’s list is mainly dominated by the ‘hot’ field of topological insulators (see the current Focus Issue in pss RRL), but organic electronics, oxides and compound semiconductors also play an important role.

physica status solidi (RRL)

• R. Sbiaa, H. Meng, S. N. Piramanayagam
  Materials with perpendicular magnetic anisotropy for magnetic random access memory [Review@RRL]
  Phys. Status Solidi RRL 2011, vol. 5, p. 413
• Judy J. Cha, Kristie J. Koski, Yi Cui
  Topological insulator nanostructures [Review@RRL]
  Phys. Status Solidi RRL 2013, vol. 7, p. 15
• Lukas Müchler, Frederick Casper, Binghai Yan, Stanislav Chadov, Claudia Felser
  Topological insulators and thermoelectric materials [Review@RRL]
  Phys. Status Solidi RRL 2013, vol. 7, p. 91
• Binghai Yan, Claudia Felser, Shou-Cheng Zhang
  Topological Insulators – From Materials Design to Reality [Preface]
  Phys. Status Solidi RRL 2013, vol. 7, p. 13
• Haijun Zhang, Shou-Cheng Zhang
  Topological insulators from the perspective of first-principles calculations [Review@RRL]
  Phys. Status Solidi RRL 2013, vol. 7, p. 72
• Jan Carl Budich, Björn Trauzettel
  From the adiabatic theorem of quantum mechanics to topological states of matter [Review@RRL]
  Phys. Status Solidi RRL 2013, vol. 7, p. 109
• Woong-Sun Kim, Yeon-Keon Moon, Sih Lee, Byung-Woo Kang, Tae-Seok Kwon, Kyung-Taek Kim, Jong-Wan Park
  Copper source/drain electrode contact resistance effects in amorphous indium–gallium–zinc-oxide thin film transistors [Rapid Research Letter]
  Phys. Status Solidi RRL 2009, vol. 3, p. 239
• M. Veldhorst, M. Snelder, M. Hoek, C. G. Molenaar, D. P. Leusink, A. A. Golubov, H. Hilgenkamp, A. Brinkman
  Magnetotransport and induced superconductivity in Bi based three-dimensional topological insulators [Review@RRL]
  Phys. Status Solidi RRL 2013, vol. 7, p. 26
• Norbert Koch
  Electronic structure of interfaces with conjugated organic materials [Review@RRL]
  Phys. Status Solidi RRL 2012, vol. 6, p. 277
• Yihua Wang, Nuh Gedik
  Circular dichroism in angle-resolved photoemission spectroscopy of topological insulators [Review@RRL]
  Phys. Status Solidi RRL 2013, vol. 7, p. 64

 physica status solidi (a)

• B. Lüssem, M. Riede, K. Leo
  Doping of organic semiconductors [Review Article]
  Phys. Status Solidi A 2013, vol. 210, p. 9
• Wolfgang Brütting, Jörg Frischeisen, Tobias D. Schmidt, Bert J. Scholz, Christian Mayr
  Device efficiency of organic light-emitting diodes: Progress by improved light outcoupling [Review Article]
  Phys. Status Solidi A 2013, vol. 210, p. 44
• Sebastian Reineke, Marc A. Baldo
  Recent progress in the understanding of exciton dynamics within phosphorescent OLEDs [Feature Article]
  Phys. Status Solidi A 2012, vol. 209, p. 2341
• Christian Heiliger, Bruno K. Meyer
  Advances in Thermoelectric Materials [Preface]
  Phys. Status Solidi A 2013, vol. 210, p. 67
• B. J. M. Hausmann, J. T. Choy, T. M. Babinec, B. J. Shields, I. Bulu, M. D. Lukin, Marko Lončar
  Diamond nanophotonics and applications in quantum science and technology [Feature Article]
  Phys. Status Solidi A 2012, vol. 209, p. 1619
• Yu-fei Meng, Chih-shiue Yan, Szczesny Krasnicki, Qi Liang, Joseph Lai, Haiyun Shu, Thomas Yu, Andrew Steele, Ho-kwang Mao, Russell J. Hemley
  High optical quality multicarat single crystal diamond produced by chemical vapor deposition [Original Paper]
  Phys. Status Solidi A 2012, vol. 209, p. 101
• R. Coehoorn, P. A. Bobbert
  Effects of Gaussian disorder on charge carrier transport and recombination in organic semiconductors [Feature Article]
  Phys. Status Solidi A 2012, vol. 209, p. 2354
• Pawel Ziolkowski, Gabriele Karpinski, Titas Dasgupta, Eckhard Müller
  Probing thermopower on the microscale [Feature Article]
  Phys. Status Solidi A 2013, vol. 210, p. 89
• Carolin M. Fella, Alexander R. Uhl, Yaroslav E. Romanyuk, Ayodhya N. Tiwari
  Cu₂ZnSnSe₄ absorbers processed from solution deposited metal salt precursors under different selenization conditions [Editor’s Choice]
  Phys. Status Solidi A 2012, vol. 209, p. 1043
• S. Hébert, W. Kobayashi, H. Muguerra, Y. Bréard, N. Raghavendra, F. Gascoin, E. Guilmeau, A. Maignan
  From oxides to selenides and sulfides: The richness of the CdI₂ type crystallographic structure for thermoelectric properties [Feature Article]
  Phys. Status Solidi A 2013, vol. 210, p. 69

 physica status solidi (b)

• B. K. Meyer, A. Polity, D. Reppin, M. Becker, P. Hering, P. J. Klar, Th. Sander, C. Reindl, J. Benz, M. Eickhoff, C. Heiliger, M. Heinemann, J. Bläsing, A. Krost, S. Shokovets, C. Müller, C. Ronning
  Binary copper oxide semiconductors: From materials towards devices [Review Article]
  Phys. Status Solidi B 2012, vol. 249, p. 1487
• Henning Sirringhaus, Tomo Sakanoue, Jui-Fen Chang
  Charge-transport physics of high-mobility molecular semiconductors [Feature Article]
  Phys. Status Solidi B 2012, vol. 249, p. 1655
• Tauc, J.; Grigorovici, R.; Vancu, A.
  Optical Properties and Electronic Structure of Amorphous Germanium [Original Paper]
  Phys. Status Solidi B 1966, vol. 15, p. 627
• Karl-Heinz Ernst
  Molecular chirality at surfaces [Review Article]
  Phys. Status Solidi B 2012, vol. 249, p. 2057
• Qi Li, R. T. Williams, Daniel Åberg
  First principles calculations and experiment predictions for iodine vacancy centers in SrI₂ [Editor’s Choice]
  Phys. Status Solidi B 2013, vol. 250, p. 233
• B. K. Meyer, H. Alves, D. M. Hofmann, W. Kriegseis, D. Forster, F. Bertram, J. Christen, A. Hoffmann, M. Straßburg, M. Dworzak, U. Haboeck, A. V. Rodina
  Bound exciton and donor–acceptor pair recombinations in ZnO [Feature Article]
  Phys. Status Solidi B 2004, vol. 241, p. 231
• J. Robertson, G. Zhong, S. Esconjauregui, C. Zhang, M. Fouquet, S. Hofmann
  Chemical vapor deposition of carbon nanotube forests [Feature Article]
  Phys. Status Solidi B 2012, vol. 249, p. 2315
• Permogorov, S.
  Hot excitons in semiconductors [Review Article]
  Phys. Status Solidi B 1975, vol. 68, p. 9
• K. A. Kolwas, G. Grabecki, S. Trushkin, J. Wróbel, M. Aleszkiewicz, Ł. Cywiński, T. Dietl, G. Springholz, G. Bauer
  Absence of nonlocal resistance in microstructures of PbTe quantum wells [Editor’s Choice]
  Phys. Status Solidi B 2013, vol. 250, p. 37
• Cliffe, Matthew J.; Goodwin, Andrew L.
  Quantification of local geometry and local symmetry in models of disordered materials [Editor’s Choice]
  Phys. Status Solidi B, 10.1002/pssb.201248553

physica status solidi (c)

• G. Xiong, U. Pal, J. G. Serrano, K. B. Ucer, R. T. Williams
  Photoluminesence and FTIR study of ZnO nanoparticles: the impurity and defect perspective [Original Paper]
  physica status solidi c 2006, vol. 3, p. 3577
• Toshio Kamiya, Kenji Nomura, Masahiro Hirano, Hideo Hosono
  Electronic structure of oxygen deficient amorphous oxide semiconductor a-InGaZnO_4–x : Optical analyses and first-principle calculations [Contributed Article]
  physica status solidi c 2008, vol. 5, p. 3098
• Tooru Tanaka, Daisuke Kawasaki, Mitsuhiro Nishio, Qixin Guo, Hiroshi Ogawa
  Fabrication of Cu₂ZnSnS₄ thin films by co-evaporation [Original Paper]
  physica status solidi c 2006, vol. 3, p. 2844
• Elison Matioli, Michael Iza, Yong-Seok Choi, Feng Wu, Stacia Keller, Hisashi Masui, Evelyn Hu, James Speck, Claude Weisbuch
  GaN-based embedded 2D photonic crystal LEDs: Numerical optimization and device characterization [Contributed Article]
  physica status solidi c, 10.1002/pssc.200880987
• Cleuson de Menezes Atayde, Ioshiaki Doi
  Highly stable hydrophilic surfaces of PDMS thin layer obtained by UV radiation and oxygen plasma treatments [Contributed Article]
  physica status solidi c 2010, vol. 7, p. 189
• Zeguo Tang, Qiming Liu, Ishwor Khatri, Ryo Ishikawa, Keiji Ueno, Hajime Shirai
  Optical properties and carrier transport in c-Si/conductive PEDOT:PSS(GO) composite heterojunctions [Contributed Article]
  Phys. Status Solidi C 2012, vol. 9, p. 2075
• Noriko Moritake, Yuki Fukui, Masatoshi Oonuki, Kunihiko Tanaka, Hisao Uchiki
  Preparation of Cu₂ZnSnS₄ thin film solar cells under non-vacuum condition [Contributed Article]
  physica status solidi c 2009, vol. 6, p. 1233
• Chichibu, Shigefusa F.; Onuma, Takeyoshi; Hazu, Kouji; Uedono, Akira
  Time-resolved luminescence studies on AlN and high AlN mole fraction AlGaN alloys [Contributed Article]
  Phys. Status Solidi C, 10.1002/pssc.201200676
• M. Androulidaki, N. T. Pelekanos, K. Tsagaraki, E. Dimakis, E. Iliopoulos, A. Adikimenakis, E. Bellet-Amalric, D. Jalabert, A. Georgakilas
  Energy gaps and bowing parameters of InAlGaN ternary and quaternary alloys [Original Paper]
  physica status solidi c 2006, vol. 3, p. 1866