Andrea Cavalleri: Publications

THz-frequency modulation of the Hubbard U in an organic Mott insulator

Physical Review Letters American Physical Society 115:18 (2015) 187401

Authors:

Rashmi Singla, Giovanni Cotugno, Stefan Kaiser, Michael Först, Matteo Mitrano, Haiyun Liu, Andrea Cartella, Cristian Manzoni, Hiroshi Okamoto, Tatsuo Hasegawa, Stephen R Clark, Dieter Jaksch, Andrea Cavalleri

Abstract:

We use midinfrared pulses with stable carrier-envelope phase offset to drive molecular vibrations in the charge transfer salt ET-F_{2}TCNQ, a prototypical one-dimensional Mott insulator. We find that the Mott gap, which is probed resonantly with 10 fs laser pulses, oscillates with the pump field. This observation reveals that molecular excitations can coherently perturb the electronic on-site interactions (Hubbard U) by changing the local orbital wave function. The gap oscillates at twice the frequency of the vibrational mode, indicating that the molecular distortions couple quadratically to the local charge density.

Spatially resolved ultrafast magnetic dynamics initiated at a complex oxide heterointerface

Nature Materials Springer Nature 14:9 (2015) 883-888

Authors:

M Först, AD Caviglia, R Scherwitzl, R Mankowsky, P Zubko, V Khanna, H Bromberger, SB Wilkins, Y-D Chuang, WS Lee, WF Schlotter, JJ Turner, GL Dakovski, MP Minitti, J Robinson, SR Clark, D Jaksch, J-M Triscone, JP Hill, SS Dhesi, A Cavalleri

Angle-resolved photoemission spectroscopy with 9-eV photon-energy pulses generated in a gas-filled hollow-core photonic crystal fiber

Applied Physics Letters AIP Publishing 107:9 (2015) 091101

Authors:

H Bromberger, A Ermolov, F Belli, H Liu, F Calegari, M Chávez-Cervantes, MT Li, CT Lin, A Abdolvand, P St J Russell, A Cavalleri, JC Travers, I Gierz

Tracking Primary Thermalization Events in Graphene with Photoemission at Extreme Time Scales

Physical Review Letters American Physical Society (APS) 115:8 (2015) 086803

Authors:

I Gierz, F Calegari, S Aeschlimann, M Chávez Cervantes, C Cacho, RT Chapman, E Springate, S Link, U Starke, CR Ast, A Cavalleri

Trace phase detection and strain characterization from serial X-ray free-electron laser crystallography of a Pr0.5Ca0.5MnO3 powder

Powder Diffraction Cambridge University Press (CUP) 30:S1 (2015) s25-s30

Authors:

Kenneth R Beyerlein, Christian Jooss, Anton Barty, Richard Bean, Sébastien Boutet, Sarnjeet S Dhesi, R Bruce Doak, Michael Först, Lorenzo Galli, Richard A Kirian, Joseph Kozak, Michael Lang, Roman Mankowsky, Marc Messerschmidt, John CH Spence, Dingjie Wang, Uwe Weierstall, Thomas A White, Garth J Williams, Oleksandr Yefanov, Nadia A Zatsepin, Andrea Cavalleri, Henry N Chapman

91̽��