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Publications

Listing 64 publications

Articles

2018

K. Shportko, P. Zalden, A.M. Lindenberg, R. Rückamp, M. Grüninger; Anharmonicity of the vibrational modes of phase-change materials: A far-infrared, terahertz, and Raman study; Vib. Spectrosc., 95, 51, 2018

2017

T. Knispel, W. Jolie, N. Borgwardt, J. Lux, Zhiwei Wang, Yoichi Ando, A. Rosch, T. Michely, M. Grüninger; Charge puddles in the bulk and on the surface of the topological insulator BiSbTeSe2 studied by scanning tunneling microscopy and optical spectroscopy; Phys. Rev. B, 96, 195135, 2017, arXiv:1708.09166

A. Koitzsch, E. Müller, M. Knupfer, B. Büchner, D. Nowak, A. Isaeva, T. Doert, M. Grüninger, S. Nishimoto, J. van den Brink; Low temperature enhancement of ferromagnetic Kitaev correlations in $\alpha$-RuCl$_3$; , Phys. Rev. Lett., 2017, arXiv:1709.02712

2016

R.B. Versteeg, I. Vergara, D. Schäfer, D. Bischoff, A. Aqeel, T.T.M. Palstra, M. Grüninger, P.H.M. van Loosdrecht; Optically probed symmetry breaking in the chiral magnet Cu2 OSeO3; Phys. Rev. B, 94, 094409, 9, 2016

F. Randi, I. Vergara, F. Novelli, M. Esposito, M. Dell’Angela, V. A. M. Brabers, P. Metcalf, R. Kukreja, H. A. Dürr, D. Fausti, M. Grüninger, F. Parmigiani; Phase separation in the non-equilibrium Verwey transition in magnetite; Phys. Rev. B, 93, 054305, 2016, http://journals.aps.org/prb/abstract/10.1103/PhysRevB.93.054305, arXiv:1509.04550

N. Borgwardt, J. Lux, I. Vergara, Zhiwei Wang, A.A. Taskin, Kouji Segawa, P.H.M. van Loosdrecht, Yoichi Ando, A. Rosch, M. Grüninger; Revealing puddles of electrons and holes in compensated topological insulators; Phys. Rev. B, 93, 245149, 2016, http://journals.aps.org/prb/abstract/10.1103/PhysRevB.93.245149, arXiv:1508.03212

2015

K. Thirunavukkuarasu, M. Langenbach, A. Roggenbuck, E. Vidal, H. Schmitz, J. Hemberger, M. Grüninger; Self-normalizing phase measurement in multimode terahertz spectroscopy based on photomixing of three lasers; Appl. Phys. Lett., 106, 031111, 2015, http://scitation.aip.org/content/aip/journal/apl/106/3/10.1063/1.4906374, arXiv:1410.0648, PDF (1191kB)

2014

Stefan Schumacher, Felix Huttmann, Marin Petrovic, Christian Witt, Daniel F. Förster, Chi Vo-Van, Johann Coraux, Antonio J. Martinez-Galera, Violetta Sessi, Ignacio Vergara, Reinhard Rückamp, Markus Grüninger, Nicolas Schleheck, Frank Meyer zu Heringdorf, Philippe Ohresser, Marko Kralj, Tim O. Wehling, Thomas Michely; Europium underneath graphene on Ir(111): Intercalation mechanism, magnetism, and band structure; Phys. Rev. B, 90, 235437, 2014, arXiv:1409.4272

T. Möller, P. Becker, L. Bohaty, J. Hemberger, M. Grüninger; Infrared-active phonon modes in monoclinic multiferroic MnWO4; Phys. Rev. B, 90, 155105, 2014, arXiv:1406.6313

M. Langenbach, A. Roggenbuck, I. Cámara Mayorga, A. Deninger, K. Thirunavukkuarasu, J. Hemberger, M. Grüninger; Group delay in THz spectroscopy with ultra-wideband log-spiral antennae; J. Infrared Milli. THz Waves, 35, 918-931, 2014, http://link.springer.com/article/10.1007/s10762-014-0098-4, arXiv:1406.6589

F. Novelli, G. De Filippis, V. Cataudella, M. Esposito, I. Vergara , F. Cilento, E. Sindici, A. Amaricci, C. Giannetti, D. Prabhakaran , S. Wall, A. Perucchi, S. Dal Conte, G. Cerullo, M. Capone , A. Mishchenko, M. Grüninger, N. Nagaosa, F. Parmigiani, D. Fausti; Witnessing the formation and relaxation of massive quasi-particles in a strongly correlated electron system; Nat. Commun., 5, 5112, 2014, http://www.nature.com/ncomms/2014/141007/ncomms6112/full/ncomms6112.html, arXiv:1403.1704

2013

E. Benckiser, L. Fels, G. Ghiringhelli, M. Moretti Sala, T. Schmitt, J. Schlappa, V. N. Strocov, N. Mufti, G. R. Blake, A. A. Nugroho, T. T. M. Palstra, M. W. Haverkort, K. Wohlfeld, M. Grüninger; Orbital superexchange and crystal field simultaneously at play in YVO3: resonant inelastic x-ray scattering at the V L edge and the O K edge; Phys. Rev. B, 88, 205115, 2013, http://prb.aps.org/abstract/PRB/v88/i20/e205115

A. Roggenbuck, M. Langenbach, K. Thirunavukkuarasu, H. Schmitz, A. Deninger, I. Camara Mayorga, R. Güsten, J. Hemberger, M. Grüninger; Enhancing the stability of a continuous-wave terahertz system by photocurrent normalization; J. Opt. Soc. Am. B, 30, 1397, 2013, http://www.opticsinfobase.org/josab/abstract.cfm?uri=josab-30-6-1397, arXiv:1302.3475

J. Reul, L. Fels, N. Qureshi, K. Shportko, M. Braden, M. Grüninger; Temperature-dependent optical conductivity of layered LaSrFeO4; Phys. Rev. B, 87, 205142, 2013, http://prb.aps.org/abstract/PRB/v87/i20/e205142, arXiv:1303.0709, PDF (835kB)

2012

A. Roggenbuck, K. Thirunavukkuarasu, H. Schmitz, J. Marx, A. Deninger, I. Cámara Mayorga, R. Güsten, J. Hemberger, M. Grüninger; Using a fiber stretcher as a fast phase modulator in a continuous-wave terahertz spectrometer; J. Opt. Soc. Am. B, 29, 614, 2012, http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-4-614

J. Reul, A. A. Nugroho, T. T. M. Palstra, M. Grüninger; Probing orbital fluctuations in RVO3 (R = Y, Gd, or Ce) by ellipsometry; Phys. Rev. B, 86, 125128, 2012, http://link.aps.org/doi/10.1103/PhysRevB.86.125128

F. Novelli, D. Fausti, J. Reul, F. Cilento, P. H. M. van Loosdrecht, A. A. Nugroho, T. T. M. Palstra, M. Grüninger, F. Parmigiani; Hubbard exciton revealed by time-domain optical spectroscopy; Phys. Rev. B, 86, 165135, 2012, http://link.aps.org/doi/10.1103/PhysRevB.86.165135

2011

A. C. Komarek, T. Möller, M. Isobe, Y. Drees, H. Ulbrich, M. Azuma, M. T. Fernández-Díaz, A. Senyshyn, M. Hoelzel, G. André, Y. Ueda, M. Grüninger, M. Braden; Magnetic order, transport and infrared optical properties in the ACrO3 system (A = Ca, Sr, and Pb); Phys. Rev. B, 84, 125114, 2011, http://link.aps.org/doi/10.1103/PhysRevB.84.125114

2010

A. Roggenbuck, H. Schmitz, A. Deninger, I.C. Mayorga, J. Hemberger, R. Güsten, M. Grüninger; Coherent broadband continuous-wave terahertz spectroscopy on solid-state samples; New J. Phys., 12, 043017, 2010

2008

A. Gössling, R. Schmitz, H. Roth, M.W. Haverkort, T. Lorenz, J.A. Mydosh, E. Müller-Hartmann, M. Grüninger; Mott-Hubbard exciton in the optical conductivity of YTiO3 and SmTiO3; Phys. Rev. B, 78, 075122, 2008, arXiv:cond-mat/0608531, PDF (378kB)

A. Gössling, M.W. Haverkort, M. Benomar, Hua Wu, D. Senff, T. Möller, M. Braden, J.A. Mydosh, M. Grüninger; Mott-Hubbard versus charge-transfer behavior in LaSrMnO4 studied via optical conductivity; Phys. Rev. B, 77, 03, 035109, 2008, arXiv:0709.3711, PDF (835kB)

E. Benckiser, R. Rückamp, T. Möller, T. Taetz, A. Möller, A. A. Nugroho, T. T. M. Palstra, G. S. Uhrig, M. Grüninger; Collective orbital excitations in orbitally ordered YVO3 and HoVO3; New J. Phys., 10, 053027, 2008, PDF (2459kB)

A. C. Komarek, S.V. Streltsov, M. Isobe, T. Möller, M. Hoelzel, A. Senyshyn, D. Trots, M. T. Fernandez-Dıaz, T. Hansen, H. Gotou, T. Yagi, Y. Ueda, V. I. Anisimov, M. Grüninger, D. I. Khomskii, M. Braden; CaCrO3: An Anomalous Antiferromagnetic Metallic Oxide; Phys. Rev. Lett., 101, 167204, 2008, PDF (541kB)

2007

K. P. Schmidt, M. Grüninger, G. S. Uhrig; Fate of orbitons coupled to phonons; Phys. Rev. B, 76, 075108, 2007, PDF (440kB)

2006

C. Ulrich, A. Gössling, M. Grüninger, M. Guennou, H. Roth, M. Cwik, T. Lorenz, G. Khaliullin, B. Keimer; Raman Scattering in the Mott Insulators LaTiO3 and YTiO3: Evidence for Orbital Excitations; Phys. Rev. Lett., 97, 157401, 2006, arXiv.org:cond-mat/0503106, PDF (1261kB)

2005

R. Rückamp, J. Baier, M. Kriener, M.W. Haverkort, T. Lorenz, G.S. Uhrig, L. Jongen, A. Möller, G. Meyer, M. Grüninger; Zero-field incommensurate spin-Peierls phase with interchain frustration in TiOCl; Phys. Rev. Lett., 95, 097203, 2005, arXiv.org:cond-mat/0503409, PDF (365kB)

R. Rückamp, E. Benckiser, M.W. Haverkort, H. Roth, T. Lorenz, A. Freimuth, L. Jongen, A. Möller, G. Meyer, P. Reutler, B. Büchner, A. Revcolevschi, S.-W. Cheong, C. Sekar, G. Krabbes, M. Grüninger; Optical study of orbital excitations in transition-metal oxides; New J. Phys., 7, 1, 144, 2005, arXiv.org:cond-mat/0503405, PDF (1463kB)

G.S. Uhrig, K.P. Schmidt, M. Grüninger; Magnetic Excitations in Bilayer High-Temperature Superconductors with Stripe Correlations; J. Phys. Soc. Jpn. Suppl., 74, 86, 2005, http://jpsj.ipap.jp/link?JPSJS/74S/86/, arXiv:cond-mat/0502460, PDF (913kB)

A. Gössling, T. Möller, W.-D. Stein, P. Becker, L. Bohaty, M. Grüninger; Phonon modes of monoclinic BiB3O6; Phys. Stat. Sol. B, 242, R85, 2005, arXiv:cond-mat/0505556, PDF (418kB)

K.P. Schmidt, A. Gössling, U. Kuhlmann, C. Thomsen, A. Löffert, C. Gross, W. Assmus; Raman Response of Magnetic Excitations in Cuprate Ladders and Planes; Phys. Rev. B, 72, 094419, 2005, arXiv:cond-mat/0503558, PDF (392kB)

G.S. Uhrig, K.P. Schmidt, M. Grüninger; Magnetic excitations in the stripe phase of high-Tc superconductors; J. Magn. Magn. Mater., 290-291, 330, 2005, arXiv:cond-mat/0407648, PDF (259kB)

2004

A.B. Kuzmenko, N. Tombros, F.P. Mena, A. Hadipour, H.J.A. Molegraaf, D. van der Marel, M. Grüninger, S. Uchida; Redistribution of the c-axis spectral weight and conductivity sum rules in LSCO as revealed by optical transmission; Physica C, 408-10, 330, 2004, PDF (227kB)

G.S. Uhrig, K.P. Schmidt, M. Grüninger; Unifying Magnons and Triplons in Stripe-Ordered Cuprate Superconductors; Phys. Rev. Lett., 93, 267003, 2004, arXiv:cond-mat/0402659, PDF (229kB)

2003

K.P. Schmidt, C. Knetter, M. Grüninger, G.S. Uhrig; Charge-order-induced sharp Raman peak in Sr14Cu24O41; Phys. Rev. Lett., 90, 16, 167201, 2003, arXiv:cond-mat/0210092, PDF (187kB)

M. Grüninger, M. Windt, E. Benckiser, T.S. Nunner, K.P. Schmidt, G.S. Uhrig, T. Kopp; Optical Spectroscopy of Low-Dimensional Quantum Spin Systems; Adv. Sol. State Phys., 43, 95, 2003, PDF (1349kB)

M. Hofmann, T. Lorenz, K. Berggold, M. Grüninger, A. Freimuth, G.S. Uhrig, E. Brück; Evidence for a large magnetic heat current in insulating layered cuprates; Phys. Rev. B, 67, 18, 184502, 2003, arXiv:cond-mat/0301093, PDF (64kB)

A.B. Kuzmenko, N. Tombros, H.J.A. Molegraaf, M. Grüninger, D. van der Marel, S. Uchida; C-axis Optical Sum Rule and a Possible New Collective Mode in La2-xSrxCuO4; Phys. Rev. Lett., 91, 3, 037004, 2003, arXiv:cond-mat/0302394, PDF (278kB)

T.S. Nunner, P. Brune, T. Kopp, M. Windt, M. Grüninger; Phonon-assisted magnetic absorption of (La,Ca)14Cu24O41: contribution of different phonon modes; Act. Phys. Pol. B, 34, 22, 1545, 2003, http://th-www.if.uj.edu.pl/acta/vol34/abs/v34p1545.htm, PDF (227kB)

G.S. Uhrig, M. Grüninger; Das Wechselspiel magnetischer Anregungen in Spinflüssigkeiten; Physik Journal, 1, 41, 2003, http://www.pro-physik.de/Phy/pdfstart.do?mid=3&articleid=17027&recordid=17064

2002

M. Grüninger, R. Rückamp, M. Windt, P. Reutler, C. Zobel, T. Lorenz, A. Freimuth, A. Revcolevschi; Experimental Quest for Orbital Waves; Nature (London), 418, 39, 2002

M. Grüninger, M. Windt, T. Nunner, C. Knetter, K.P. Schmidt, G.S. Uhrig, T. Kopp, A. Freimuth, U. Ammerahl, B. Büchner, A. Revcolevschi; Optical Spectroscopy of (La,Ca)14Cu24O41 spin ladders: comparison of experiment and theory; Physica B, 312-313, 617, 2002, arXiv:cond-mat/0108437, PDF (97kB)

M. Grüninger, M. Windt, T. Nunner, C. Knetter, K.P. Schmidt, G.S. Uhrig, T. Kopp, A. Freimuth, U. Ammerahl, B. Büchner, A. Revcolevschi; Magnetic Excitations in Two-leg Spin 1/2 ladders: Experiment and Theory; J. Phys. Chem. Sol., 63, 2167, 2002, arXiv:cond-mat/0109524, PDF (845kB)

V. Kataev, K.-Y.Choi, M. Grüninger, U. Ammerahl, B. Büchner, A. Freimuth, A. Revcolevschi; ESR Study of (Sr,La,Ca)14Cu24O41; Physica B, 312-313, 614, 2002, arXiv:cond-mat/0108512, PDF (108kB)

T.S. Nunner, P. Brune, T. Kopp, M. Windt, M. Grüninger; Cyclic spin exchange in cuprate spin ladders; Phys. Rev. B, 66, 180404(R), 2002, arXiv:cond-mat/0203472, PDF (256kB)

C. Zobel, M. Kriener, D. Bruns, J. Baier, M. Grüninger, T. Lorenz, P. Reutler, A. Revcolevschi; Evidence for a low-spin to intermediate-spin state transition in LaCoO3; Phys. Rev. B, 66, 020402(R), 2002, arXiv:cond-mat/0205479, PDF (81kB)

T. Lorenz, M. Hofmann, M. Grüninger, A. Freimuth, G.S. Uhrig, M. Dumm, M. Dressel; Evidence for spin-charge separation in quasi-one-dimensional organic conductors (This article has been retracted!); Nature (London), 418, 614, 2002, PDF (51kB)

2001

V. Kataev, K.-Y. Choi, M. Grüninger, U. Ammerahl, B. Büchner, A. Freimuth, A. Revcolevschi; Strong Anisotropy of Superexchange in the Copper-Oxygen Chains of La14-xCaxCu24O41; Phys. Rev. Lett., 86, 2882, 2001, arXiv:cond-mat/0101040, PDF (173kB)

V. Kataev, K.-Y. Choi, M. Grüninger, U. Ammerahl, B. Büchner, A. Freimuth, A. Revcolevschi; Interplay of spin and charge dynamics in Sr14-xCaxCu24O41; Phys. Rev. B, 64, 104422, 2001, PDF (525kB)

C. Knetter, K.P. Schmidt, M. Grüninger , G.S. Uhrig; Fractional and Integer Excitations in Quantum Antiferromagnetic Spin 1/2 Ladders; Phys. Rev. Lett., 87, 167204, 2001, arXiv:cond-mat/0106077, PDF (173kB)

M. Windt, M. Grüninger, T. Nunner, C. Knetter, K. Schmidt, G.S. Uhrig, T. Kopp, A. Freimuth, U. Ammerahl, B. Büchner, A. Revcolevschi; Observation of two-magnon bound states in the two-leg ladders of (Ca,La)14Cu24O41; Phys. Rev. Lett., 87, 127002, 2001, arXiv:cond-mat/0103438, PDF (191kB)

2000

D. van der Marel, A. Tsvetkov, M. Grüninger, D. Dulic, H.J. Molegraaf; C-axis optical properties of high Tc cuprates; Physica C, 341, 1531, 2000, PDF (232kB)

M. Grüninger, D. van der Marel, A. Damascelli, A. Erb, T. Nunner, T. Kopp; Midinfrared absorption in YBa2Cu3O6: Evidence for a failure of spin-wave theory for spin 1/2 in two dimensions; Phys. Rev. B, 62, 12422, 2000, PDF (146kB)

M. Grüninger, D. van der Marel, A.A. Tsvetkov, A. Erb; Observation of out-of-phase bilayer plasmons in YBa2Cu3O7-δ; Phys. Rev. Lett., 84, 1575, 2000, PDF (252kB)

1999

M. Grüninger, D. van der Marel, A. Damascelli, A. Zibold, H.P. Geserich, A. Erb, M. Kläser, Th. Wolf, T. Nunner, T. Kopp; Charged magnons and magneto-elastic polarons in the mid-infrared spectrum of YBa2Cu3O6; Physica C, 317-18, 286, 1999, PDF (189kB)

1998

M. Grüninger, D. van der Marel, H.P. Geserich, Th. Wolf, A. Erb, T. Kopp; Infrared spectroscopy on Y1-xRExBa2Cu3-yZnyO6 (RE=Pr, Gd, x=0 and 0.8; y=0 and ≈0.15); Physica B, 244, 60, 1998, PDF (347kB)

A. Damascelli, D. van der Marel, M. Grüninger, C. Presura, T.T.M. Palstra, J. Jegoudez, A. Revcolevschi; Direct two-magnon optical absorption in α'-NaV2O5: ``charged" magnons; Phys. Rev. Lett., 81, 918, 1998, PDF (274kB)

A.A. Tsvetkov, D. van der Marel, K.A. Moler, J.R. Kirtley, J.L. de Boer, A. Meetsma, Z.F. Ren, N. Koleshnikov, D. Dulic, A. Damascelli, M. Grüninger, J. Schützmann, J.W. van der Eb, H.S. Somal, J.H. Wang; Global and local measures of the intrinsic Josephson coupling in Tl2Ba2CuO6 as a test of the interlayer tunneling model; Nature (London), 395, 360, 1998

1997

A. Zibold, H.L. Liu, D.B. Tanner, J.Y. Wang, M. Grüninger, H.P. Geserich, T. Kopp, Th. Wolf, W. Widder, H.F. Braun; Optical study of antiferromagnetic single crystals Y1-xPrxBa2Cu3O6 in high magnetic fields; Phys. Rev. B, 55, 11096, 1997, PDF (172kB)

1996

M. Grüninger, D. van der Marel, P.J.M. van Bentum, A. Erb, H.P. Geserich, T. Kopp; Far- and mid-infrared spectrum of YBa2Cu3O6.0 in high magnetic fields; J. Low Temp. Phys., 105, 389, 1996, PDF (332kB)

M. Grüninger, D. van der Marel, P.J.M. van Bentum, A. Erb, Th. Wolf, T. Kopp; Probing the mid-infrared spectrum of YBa2Cu3O6.0 with high magnetic fields and Zinc doping; Czech. J. Phys., 46 (S2), 1127, 1996, PDF (182kB)

M. Grüninger, J. Münzel, A. Gaymann, A. Zibold, H.P. Geserich, T. Kopp; Spin-waves in the mid-infrared spectrum of antiferromagnetic YBa2Cu3O6.0; Europhys. Lett., 35, 55, 1996, PDF (623kB)

In proceedings

2009

A. Roggenbuck, A. Deninger, I.C. Mayorga, H. Schmitz, J. Hemberger, F. Lison, M. Grüninger; CW Terahertz Spectrometer with High-Precision Frequency Control; , , 2009 CONFERENCE ON LASERS AND ELECTRO-OPTICS AND QUANTUM ELECTRONICS AND LASER SCIENCE CONFERENCE (CLEO/QELS 2009),, 2009

A. Deninger, A. Roggenbuck, S. Schindler, I. Camara Mayorga, H. Schmitz, J. Hemberger, R. Güsten, M. Grüninger; Cw THz Spectrometer with High-Precision Frequency Control; , , Conference on Lasers and Electro-Optics and Quantum Electronics and Laser Science (CLEO/QELS 2009), Vols. 1-5, 2009

A. Deninger, A. Roggenbuck, S. Schindler, I. Camara Mayorga, H. Schmitz, J. Hemberger, R. Güsten, M. Grüninger; Cw THz Spectrometer with High SNR and MHz Frequency Resolution; , , 34th International Conference on Infrared, Millimeter, and Terahertz waves, Vols. 1 and 2, 2009