Correlation between Superfluid Density and T_C of Underdoped YBa_2Cu_3O_(6+x) Near the Superconductor-Insulator Transition

Yuri Zuev; Mun Seog Kim; Thomas R. Lemberger

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Correlation between Superfluid Density and T_C of Underdoped YBa_2Cu_3O_(6+x) Near the Superconductor-Insulator Transition

机译：超导体-绝缘体转变附近低掺杂YBa_2Cu_3O_（6 + x）的超流体密度与T_C的相关性

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We report measurements of the ai-plane superfluid density n_s (magnetic penetration depth λ) of heavily underdoped films of YBa_2Cu_3O_(6+x), with T_C's from 6 to 50 K. We find the characteristic length for vortex unbinding transition equal to the film thickness, suggesting strongly coupled CuO_2 layers. At the lowest dopings, T_C is as much as 5 times larger than the upper limit set by the 2D Kosterlitz-Thouless-Berezinskii transition temperature calculated for individual CuO_2 bilayers. Our main finding is that T_C is not proportional to n_s(0); instead, we find T_C ∝ n_s~(1/2.3±0.4). This conflicts with a popular point of view that quasi-2D thermal phase fluctuations determine the transition temperature.

机译：我们报告了YBa_2Cu_3O_（6 + x）的重掺杂不足薄膜的ai平面超流体密度n_s（磁渗透深度λ）的测量值，T_C为6至50K。我们发现涡旋解离跃迁的特征长度等于薄膜厚度，表明强耦合的CuO_2层。在最低掺杂下，T_C比为各个CuO_2双层计算的2D Kosterlitz-Thouless-Berezinskii转变温度设定的上限高5倍之多。我们的主要发现是T_C与n_s（0）不成比例。相反，我们发现T_C∝n_s〜（1 / 2.3±0.4）。这与流行的观点相冲突，准二维热相波动决定了转变温度。

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来源
《Physical review letters》 |2005年第13期|p.137002.1-137002.4|共4页
作者
Yuri Zuev; Mun Seog Kim; Thomas R. Lemberger;
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作者单位

Department of Physics, Ohio State University, 191 Woodruff Avenue, Columbus, Ohio 43210, USA;

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正文语种 eng
中图分类物理学;
关键词
fluctuations (noise, chaos, nonequilibrium superconductivity, localization, etc.); transport properties (electric and thermal conductivity, thermoelectric effects, etc.); Y-based cuprates; high-Tc films;

机译：波动（噪声;混沌;非平衡超导电性;局域性等）;传输特性（电导率和热导率;热电效应等）;Y型铜酸盐;高Tc膜;

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1. Lower Critical Field and Superfluid Density of Highly Underdoped YBa_2Cu_3O_(6+x) Single Crystals [J] . Ruixing Liang, D. A. Bonn, W. N. Hardy, Physical review letters . 2005,第11期

机译：高度未掺杂的YBa_2Cu_3O_（6 + x）单晶的下临界场和超流体密度
2. Lattice dynamical signature of charge density wave formation in underdoped YBa_2Cu_3O_(6+x) [J] . M. Bakr, S. M. Souliou, S. Blanco-Canosa, Physical review . 2013,第21期

机译：欠掺杂YBa_2Cu_3O_（6 + x）中电荷密度波形成的晶格动力学特征
3. Spin-Density Wave Fermi Surface Reconstruction in Underdoped YBa_2Cu_3O_(6+x) [J] . N. Harrison Physical review letters . 2009,第20期

机译：掺杂不足的YBa_2Cu_3O_（6 + x）中自旋密度波费米表面的重建
4. In-Plane Superfluid Density of Highly Underdoped YBa_(2)Cu_(3)O_(6+x) [C] . D. M. Broun, P. J. Turner, W. A. Huttema, International Conference on Low Temperature Physics . 2005

机译：高度较高的YBA_（2）CU_（3）O_（6 + x）的平面内溢密度密度
5. Confinement and the superfluid density in theories of the underdoped cuprates, and strongly commensurate dirty bosons in the large-N limit. [D] . Case, Matthew J. 2005

机译：掺杂不足的铜酸盐的理论的局限性和超流体密度，以及与大N极限相当的脏玻色子。
6. Controlling the near-surface superfluid density in underdoped YBa2Cu3O6+x by photo-illumination [O] . E. Stilp, A. Suter, T. Prokscha, -1

机译：通过光照射控制掺杂不足的YBa2Cu3O6 + x中的近表面超流体密度
7. Comment to: Correlation Between Superfluid Density and T_{c} of Underdoped YBa2Cu3O6+x Near the Superconductor-Insulator Transition [O] . Schneider, T. 2005

机译：评论：超流体密度与T_ {c}之间的相关性未掺杂的YBa2Cu3O6 + x靠近超导体 - 绝缘体转换

Correlation between Superfluid Density and T_C of Underdoped YBa_2Cu_3O_(6+x) Near the Superconductor-Insulator Transition

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