Details

Autor(en) / Beteiligte

• He, Rui-Hua
• Hashimoto, M.
• Karapetyan, H.
• Koralek, J. D.
• Hinton, J. P.
• Testaud, J. P.
• Nathan, V.
• Yoshida, Y.
• Yao, Hong
• Tanaka, K.
• Meevasana, W.
• Moore, R. G.
• Lu, D. H.
• Mo, S.-K.
• Ishikado, M.
• Eisaki, H.
• Hussain, Z.
• Devereaux, T. P.
• Kivelson, S. A.
• Orenstein, J.
• Kapitulnik, A.
• Shen, Z.-X.

Titel

From a Single-Band Metal to a High-Temperature Superconductor via Two Thermal Phase Transitions

Ist Teil von

• Science (American Association for the Advancement of Science), 2011-03, Vol.331 (6024), p.1579-1583

Ort / Verlag

Washington, DC: American Association for the Advancement of Science

Erscheinungsjahr

2011

Link zum Volltext

Quelle

American Association for the Advancement of Science

Beschreibungen/Notizen

• The nature of the pseudogap phase of cuprate high-temperature superconductors is a major unsolved problem in condensed matter physics. We studied the commencement of the pseudogap state at temperature T* using three different techniques (angle-resolved photoemission spectroscopy, polar Kerr effect, and time-resolved reflectivity) on the same optimally doped Bi2201 crystals. We observed the coincident, abrupt onset at T* of a particle-hole asymmetric antinodal gap in the electronic spectrum, a Kerr rotation in the reflected light polarization, and a change in the ultrafast relaxational dynamics, consistent with a phase transition. Upon further cooling, spectroscopic signatures of superconductivity begin to grow close to the superconducting transition temperature (T c ), entangled in an energy-momentum—dependent manner with the preexisting pseudogap features, ushering in a ground state with coexisting orders.