Andrea Cavalleri: Publications

Optically induced coherent transport far above Tc in underdoped YBa2Cu3O6+δ

Physical Review B American Physical Society (APS) 89:18 (2014) 184516

Authors:

S Kaiser, CR Hunt, D Nicoletti, W Hu, I Gierz, HY Liu, M Le Tacon, T Loew, D Haug, B Keimer, A Cavalleri

Melting of Charge Stripes in Vibrationally Driven La1.875Ba0.125CuO4: Assessing the Respective Roles of Electronic and Lattice Order in Frustrated Superconductors

Physical Review Letters American Physical Society (APS) 112:15 (2014) 157002

Authors:

M Först, RI Tobey, H Bromberger, SB Wilkins, V Khanna, AD Caviglia, Y-D Chuang, WS Lee, WF Schlotter, JJ Turner, MP Minitti, O Krupin, ZJ Xu, JS Wen, GD Gu, SS Dhesi, A Cavalleri, JP Hill

Pressure-Dependent Relaxation in the Photoexcited Mott Insulator ET–F2TCNQ: Influence of Hopping and Correlations on Quasiparticle Recombination Rates

Physical Review Letters American Physical Society (APS) 112:11 (2014) 117801

Authors:

M Mitrano, G Cotugno, SR Clark, R Singla, S Kaiser, J Stähler, R Beyer, M Dressel, L Baldassarre, D Nicoletti, A Perucchi, T Hasegawa, H Okamoto, D Jaksch, A Cavalleri

Pulse shaping in the mid-infrared by a deformable mirror.

Optics Letters Optica Publishing Group 39:6 (2014) 1485-1488

Authors:

Andrea Cartella, Stefano Bonora, Michael Först, Giulio Cerullo, Andrea Cavalleri, Cristian Manzoni

Optical properties of a vibrationally modulated solid state Mott insulator.

Sci Rep 4 (2014) 3823

Authors:

S Kaiser, SR Clark, D Nicoletti, G Cotugno, RI Tobey, N Dean, S Lupi, H Okamoto, T Hasegawa, D Jaksch, A Cavalleri

Abstract:

Optical pulses at THz and mid-infrared frequencies tuned to specific vibrational resonances modulate the lattice along chosen normal mode coordinates. In this way, solids can be switched between competing electronic phases and new states are created. Here, we use vibrational modulation to make electronic interactions (Hubbard-U) in Mott-insulator time dependent. Mid-infrared optical pulses excite localized molecular vibrations in ET-F2TCNQ, a prototypical one-dimensional Mott-insulator. A broadband ultrafast probe interrogates the resulting optical spectrum between THz and visible frequencies. A red-shifted charge-transfer resonance is observed, consistent with a time-averaged reduction of the electronic correlation strength U. Secondly, a sideband manifold inside of the Mott-gap appears, resulting from a periodically modulated U. The response is compared to computations based on a quantum-modulated dynamic Hubbard model. Heuristic fitting suggests asymmetric holon-doublon coupling to the molecules and that electron double-occupancies strongly squeeze the vibrational mode.

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