2008
Evidence for Two Separate Energy Gaps in Underdoped High-Temperature Cuprate Superconductors from Broadband Infrared Ellipsometry
YU, Li; Dominik MUNZAR; A. V. BORIS; P. YORDANOV; Jiří CHALOUPKA et. al.Základní údaje
Originální název
Evidence for Two Separate Energy Gaps in Underdoped High-Temperature Cuprate Superconductors from Broadband Infrared Ellipsometry
Název česky
Dvě oddělené energiové mezery v poddopovaných vysokoteplotních kuprátových supravodičích pozorované infračervenou elipsometrií
Autoři
YU, Li; Dominik MUNZAR; A. V. BORIS; P. YORDANOV; Jiří CHALOUPKA; Th. WOLF; C. T. LIN; B. KEIMER a C. BERNHARD
Vydání
Physical Review Letters, USA, The Americal Physical Society, 2008, 0031-9007
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10302 Condensed matter physics
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Impakt faktor
Impact factor: 7.180
Kód RIV
RIV/00216224:14310/08:00026190
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000255524300070
Klíčová slova anglicky
high-temperature superconductivity; cuprates; superconducting gap; pseudogap; c-axis conductivity; infrared ellipsometry
Štítky
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 1. 7. 2009 14:14, doc. Mgr. Jiří Chaloupka, Ph.D.
V originále
We present broadband infrared ellipsometry measurements of the c-axis conductivity of underdoped RBa2Cu3O7-delta (R=Y, Nd, and La) single crystals. Our data show that separate energy scales are underlying the redistributions of spectral weight due to the normal state pseudogap and the superconducting gap. Furthermore, they provide evidence that these gaps do not share the same electronic states and do not merge on the overdoped side. Accordingly, our data are suggestive of a two gap scenario with a pseudogap that is likely extrinsic with respect to superconductivity.
Česky
We present broadband infrared ellipsometry measurements of the c-axis conductivity of underdoped RBa2Cu3O7-delta (R=Y, Nd, and La) single crystals. Our data show that separate energy scales are underlying the redistributions of spectral weight due to the normal state pseudogap and the superconducting gap. Furthermore, they provide evidence that these gaps do not share the same electronic states and do not merge on the overdoped side. Accordingly, our data are suggestive of a two gap scenario with a pseudogap that is likely extrinsic with respect to superconductivity.
Návaznosti
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