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91探花
Insertion of STC into TRT at the Department of Physics, 91探花
Credit: CERN

Hans Kraus

Professor of Physics

Research theme

  • Particle astrophysics & cosmology

Sub department

  • Particle Physics

Research groups

  • LUX-ZEPLIN
Hans.Kraus@physics.ox.ac.uk
Telephone: 01865 (2)73361
Denys Wilkinson Building, room 623
  • About
  • Publications

Observation of a low energy nuclear recoil peak in the neutron calibration data of the CRESST-III experiment

Physical Review D American Physical Society (APS) 108:2 (2023) 022005

Authors:

G Angloher, S Banik, G Benato, A Bento, A Bertolini, R Breier, C Bucci, J Burkhart, L Canonica, A D鈥橝ddabbo, S Di Lorenzo, L Einfalt, A Erb, FV Feilitzsch, S Fichtinger, D Fuchs, A Fuss, A Garai, VM Ghete, S Gerster, P Gorla, PV Guillaumon, S Gupta, D Hauff, M Je拧kovsk媒, J Jochum, M Kaznacheeva, A Kinast, H Kluck, H Kraus, A Langenk盲mper, M Mancuso, L Marini, L Meyer, V Mokina, A Nilima, M Olmi, T Ortmann, C Pagliarone, L Pattavina, F Petricca, W Potzel, P Povinec, F Pr枚bst, F Pucci, F Reindl, J Rothe, K Sch盲ffner, J Schieck, D Schmiedmayer, S Sch枚nert, C Schwertner, M Stahlberg, L Stodolsky, C Strandhagen, R Strauss, I Usherov, F Wagner, M Willers, V Zema

Background determination for the LUX-ZEPLIN dark matter experiment

Physical Review D American Physical Society (APS) 108:1 (2023) 012010

Authors:

J Aalbers, DS Akerib, AK Al Musalhi, F Alder, SK Alsum, CS Amarasinghe, A Ames, TJ Anderson, N Angelides, HM Ara煤jo, JE Armstrong, M Arthurs, A Baker, J Bang, JW Bargemann, A Baxter, K Beattie, P Beltrame, EP Bernard, A Bhatti, A Biekert, TP Biesiadzinski, HJ Birch, GM Blockinger, B Boxer, CAJ Brew, P Br谩s, S Burdin, M Buuck, R Cabrita, MC Carmona-Benitez, C Chan, A Chawla, H Chen, APS Chiang, NI Chott, MV Converse, A Cottle, G Cox, O Creaner, CE Dahl, A David, S Dey, L de Viveiros, C Ding, JEY Dobson, E Druszkiewicz, SR Eriksen, A Fan, NM Fearon, S Fiorucci, H Flaecher, ED Fraser, T Fruth, RJ Gaitskell, J Genovesi, C Ghag, R Gibbons, MGD Gilchriese, S Gokhale, J Green, MGD van der Grinten, CB Gwilliam, CR Hall, S Han, E Hartigan-O鈥機onnor, SJ Haselschwardt, SA Hertel, G Heuermann, M Horn, DQ Huang, D Hunt, CM Ignarra, RG Jacobsen, O Jahangir, RS James, J Johnson, AC Kaboth, AC Kamaha, D Khaitan, I Khurana, R Kirk, D Kodroff, L Korley, EV Korolkova, H Kraus, S Kravitz, L Kreczko, B Krikler, VA Kudryavtsev, EA Leason, J Lee, DS Leonard, KT Lesko, C Levy, J Lin, A Lindote, R Linehan, WH Lippincott, X Liu, MI Lopes, E Lopez Asamar, B L贸pez Paredes, W Lorenzon, C Lu, S Luitz, PA Majewski, A Manalaysay, RL Mannino, N Marangou, ME McCarthy, DN McKinsey, J McLaughlin, EH Miller, E Mizrachi, A Monte, ME Monzani, JD Morales Mendoza, E Morrison, BJ Mount, M Murdy, A St. J. Murphy, D Naim, A Naylor, C Nedlik, HN Nelson, F Neves, A Nguyen, JA Nikoleyczik, I Olcina, KC Oliver-Mallory, J Orpwood, KJ Palladino, J Palmer, N Parveen, SJ Patton, B Penning, G Pereira, E Perry, T Pershing, A Piepke, D Porzio, S Poudel, Y Qie, J Reichenbacher, CA Rhyne, Q Riffard, GRC Rischbieter, HS Riyat, R Rosero, P Rossiter, T Rushton, D Santone, ABMR Sazzad, RW Schnee, S Shaw, T Shutt, JJ Silk, C Silva, G Sinev, R Smith, M Solmaz, VN Solovov, P Sorensen, J Soria, I Stancu, A Stevens, K Stifter, B Suerfu, TJ Sumner, N Swanson, M Szydagis, R Taylor, WC Taylor, DJ Temples, PA Terman, DR Tiedt, M Timalsina, Z Tong, DR Tovey, J Tranter, M Trask, M Tripathi, DR Tronstad, W Turner, U Utku, AC Vaitkus, A Wang, JJ Wang, W Wang, Y Wang, JR Watson, RC Webb, TJ Whitis, M Williams, FLH Wolfs, S Woodford, D Woodward, CJ Wright, Q Xia, X Xiang, J Xu, M Yeh

Results on sub-GeV dark matter from a 10 eV threshold CRESST-III silicon detector

Physical Review D American Physical Society (APS) 107:12 (2023) 122003

Authors:

G Angloher, S Banik, G Benato, A Bento, A Bertolini, R Breier, C Bucci, J Burkhart, L Canonica, A D鈥橝ddabbo, S Di Lorenzo, L Einfalt, A Erb, FV Feilitzsch, N Ferreiro Iachellini, S Fichtinger, D Fuchs, A Fuss, A Garai, VM Ghete, S Gerster, P Gorla, PV Guillaumon, S Gupta, D Hauff, M Je拧kovsk媒, J Jochum, M Kaznacheeva, A Kinast, H Kluck, H Kraus, A Langenk盲mper, M Mancuso, L Marini, L Meyer, V Mokina, A Nilima, M Olmi, T Ortmann, C Pagliarone, L Pattavina, F Petricca, W Potzel, P Povinec, F Pr枚bst, F Pucci, F Reindl, J Rothe, K Sch盲ffner, J Schieck, D Schmiedmayer, S Sch枚nert, C Schwertner, M Stahlberg, L Stodolsky, C Strandhagen, R Strauss, I Usherov, F Wagner, M Willers, V Zema

Synthesis, Crystal Structure and Photoluminescent Properties of Red-Emitting CaAl4O7:Cr3+ Nanocrystalline Phosphor

Inorganics MDPI 11:5 (2023) 205

Authors:

Leonid Vasylechko, Vitalii Stadnik, Vasyl Hreb, Yaroslav Zhydachevskyy, Andriy Luchechko, Vitaliy Mykhaylyk, Hans Kraus, Andrzej Suchocki

Exciton formation dynamics and band-like free charge-carrier transport in 2D metal halide perovskite semiconductors

Advanced Functional Materials Wiley 33:32 (2023) 2300363

Authors:

Silvia G Motti, Manuel Kober-Czerny, Marcello Righetto, Philippe Holzhey, Joel Smith, Hans Kraus, Henry J Snaith, Michael B Johnston, Laura M Herz

Abstract:

Metal halide perovskite (MHP) semiconductors have driven a revolution in optoelectronic technologies over the last decade, in particular for high-efficiency photovoltaic applications. Low-dimensional MHPs presenting electronic confinement have promising additional prospects in light emission and quantum technologies. However, the optimisation of such applications requires a comprehensive understanding of the nature of charge carriers and their transport mechanisms. This study employs a combination of ultrafast optical and terahertz spectroscopy to investigate phonon energies, charge-carrier mobilities, and exciton formation in 2D (PEA)2PbI4 and (BA)2PbI4 (where PEA is phenylethylammonium and BA is butylammonium). Temperature-dependent measurements of free charge-carrier mobilities reveal band transport in these strongly confined semiconductors, with surprisingly high in-plane mobilities. Enhanced charge-phonon coupling is shown to reduce charge-carrier mobilities in (BA)2PbI4 with respect to (PEA)2PbI4. Exciton and free charge-carrier dynamics are disentangled by simultaneous monitoring of transient absorption and THz photoconductivity. A sustained free charge-carrier population is observed, surpassing the Saha equation predictions even at low temperature. These findings provide new insights into the temperature-dependent interplay of exciton and free-carrier populations in 2D MHPs. Furthermore, such sustained free charge-carrier population and high mobilities demonstrate the potential of these semiconductors for applications such as solar cells, transistors, and electrically driven light sources.

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