Volume 119, Number 2, July 2017
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||05 October 2017|
Crucial role of internal collective modes in underdoped cuprates
1 Department of Physics, Center for Condensed Matter Theory, Indian Institute of Science Bengaluru-560012, India
2 Department of Physics, Ewing Christian College - Allahabad-211003, India
3 School of Physics, Indian Institute of Science Education and Research - Thiruvananthapuram-695016, India
Received: 5 April 2017
Accepted: 4 September 2017
The enigmatic cuprate superconductors have attracted resurgent interest with several recent reports and discussions of competing orders in the underdoped side. Motivated by this, here we address the natural question of fragility of the d-wave superconducting state in underdoped cuprates. Using a combination of theoretical approaches we study –like models, and discover an —as yet unexplored— instability that is brought about by an “internal” (anti-symmetric mode) fluctuation of the d-wave state. This new theoretical result is in good agreement with recent STM and ARPES studies of cuprates. We also suggest experimental directions to uncover this physics.
PACS: 74.20.-z – Theories and models of superconducting state / 74.72.-h – Cuprate superconductors / 74.90.+n – Other topics in superconductivity (restricted to new topics in section 74)
© EPLA, 2017
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