Higgs Amplitude Mode in the BCS Superconductors Nb1-xTixN Induced by Terahertz Pulse Excitation

被引：333

作者：

Matsunaga, Ryusuke ^{[1
]}

Hamada, Yuki I. ^{[1
]}

Makise, Kazumasa ^{[2
]}

Uzawa, Yoshinori ^{[3
]}

Terai, Hirotaka ^{[2
]}

Wang, Zhen ^{[2
]}

Shimano, Ryo ^{[1
]}

机构：

[1] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

[2] Natl Inst Informat & Commun Technol, Nishi Ku, Kobe, Hyogo 6512492, Japan

[3] Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 05期

关键词：

CHARGE-DENSITY WAVES; SYMMETRY-BREAKING; COLLECTIVE MODES; CARBON NANOTUBES; ENERGY-GAP; TRANSITION; FIELD; SPECTROSCOPY; GENERATION; RELAXATION;

D O I：

10.1103/PhysRevLett.111.057002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Ultrafast responses of BCS superconductor Nb1-xTixN films in a nonadiabatic excitation regime were investigated by using terahertz (THz) pump-THz probe spectroscopy. After an instantaneous excitation with the monocycle THz pump pulse, a transient oscillation emerges in the electromagnetic response in the BCS gap energy region. The oscillation frequency coincides with the asymptotic value of the BCS gap energy, indicating the appearance of the theoretically anticipated collective amplitude mode of the order parameter, namely the Higgs amplitude mode. Our result opens a new pathway to the ultrafast manipulation of the superconducting order parameter by optical means.

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页数：5

相关论文

共 40 条

[1] Synchronization in the BCS pairing dynamics as a critical phenomenon [J].

Barankov, R. A. ;

Levitov, L. S. .

PHYSICAL REVIEW LETTERS, 2006, 96 (23)

[2] Collective Rabi oscillations and solitons in a time-dependent BCS pairing problem [J].

Barankov, RA ;

Levitov, LS ;

Spivak, BZ .

PHYSICAL REVIEW LETTERS, 2004, 93 (16) :160401-1

[3] Amplitude or Higgs modes in d-wave superconductors [J].

Barlas, Yafis ;

Varma, C. M. .

PHYSICAL REVIEW B, 2013, 87 (05)

[4] Energy-Gap Dynamics of Superconducting NbN Thin Films Studied by Time-Resolved Terahertz Spectroscopy [J].

Beck, M. ;

Klammer, M. ;

Lang, S. ;

Leiderer, P. ;

Kabanov, V. V. ;

Gol'tsman, G. N. ;

Demsar, J. .

PHYSICAL REVIEW LETTERS, 2011, 107 (17)

[5] Detecting the Amplitude Mode of Strongly Interacting Lattice Bosons by Bragg Scattering [J].

Bissbort, Ulf ;

Goetze, Soeren ;

Li, Yongqiang ;

Heinze, Jannes ;

Krauser, Jasper S. ;

Weinberg, Malte ;

Becker, Christoph ;

Sengstock, Klaus ;

Hofstetter, Walter .

PHYSICAL REVIEW LETTERS, 2011, 106 (20)

[6] Feshbach resonances in ultracold gases [J].

Chin, Cheng ;

Grimm, Rudolf ;

Julienne, Paul ;

Tiesinga, Eite .

REVIEWS OF MODERN PHYSICS, 2010, 82 (02) :1225-1286

[7] Single particle and collective excitations in the one-dimensional charge density wave solid K0.3MoO3 probed in real time by femtosecond spectroscopy [J].

Demsar, J ;

Biljakovic, K ;

Mihailovic, D .

PHYSICAL REVIEW LETTERS, 1999, 83 (04) :800-803

[8]

Dienst A, 2011, NAT PHOTONICS, V5, P485, DOI [10.1038/nphoton.2011.124, 10.1038/NPHOTON.2011.124]

[9] The 'Higgs' amplitude mode at the two-dimensional superfluid/Mott insulator transition [J].

Endres, Manuel ;

Fukuhara, Takeshi ;

Pekker, David ;

Cheneau, Marc ;

Schauss, Peter ;

Gross, Christian ;

Demler, Eugene ;

Kuhr, Stefan ;

Bloch, Immanuel .

NATURE, 2012, 487 (7408) :454-U64

[10] High Energy THz Pulse Generation by Tilted Pulse Front Excitation and Its Nonlinear Optical Applications [J].

Fueloep, Jozsef Andras ;

Palfalvi, Laszlo ;

Almasi, Gabor ;

Hebling, Janos .

JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES, 2011, 32 (05) :553-561

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