21 Concepts in High Temperature Superconductivity 1337
249. A.V. Sologubenko, J. Jun, S.M. Kazakov, J. Karpinski, and H.R. Ott, Temperature dependence and anisotropy of the
bulk upper critical field H
c2
of MgB
2
,Phys.Rev.B65, R180505–R180508(2002)
250. S.Lee,Z.G.Khim,Y.Chong,S.H.Moon,H.N.Lee,H.G.Kim,B.Oh,and E.J.Choi,Measurements ofthesuperconducting
gap of MgB
2
by point contact of spectroscopy, Physica C 377, 202–207 (2002)
251. T.Arai, K. Ichimura,K. Nomur,S. Takasaki, J.Yamada, S. Nakatsuji, and H.Anzai, Superconducting and normal-state
gaps in -(BEDT-TTF)
2
Cu(NCS)
2
studied by STM spectroscopy, Solid State Commun.116, 679–682 (2000)
252. Y.J. Uemura, A. Keren, L.P. Le, G.M. Luke, W.D. Wu, Y. Kubo, T. Manako, Y. Shimakawa, M. Subramanian, J.L. Cobb,
and J.T. Markert, Magnetic-field penetration depth in Tl
2
Ba
2
CuO
6+ı
in the overdoped regime, Nature 364, 605–607
(1993)
253. R.Prozorov, R.W.Giannetta,A.Carrington,P.Fournier, R.L. Greene,P. Guptasarma,D.G.Hinks,andA.R.Banks, Mea-
surements of the absolute value of the penetration depth in high-T
c
superconductors usinga low-T
c
superconductive
coating,Appl.Phys. Lett. 77, 4202 (2000)
254. A. Biswas, P. Fournier, V.N. Smolyaninova,R.C. Budhani, J.S. Higgins, and R.L. Greene, Gapped tunneling spectra in
the normal state of Pr
2−x
Ce
x
CuO
4
,Phys.Rev.B64, 104519–104526(2001)
255. T.Kajitani,K.Hiraga,S.Hosoya,T.Fukuda,K.Oh-ishi,andY.Syono,Structural study of oxygen-saturatedor quenched
Pr
2−x
Ce
x
CuO
4
with x 0.15, Physica C 178, 397–404 (1991)
256. L. Ozyuzer, Z. Yusof, J.F. Zasadzinski, R. Mogilevsky, D.G. Hinks, and K.E. Gray, Evidence of d
x
2
−y
2 symmetry in the
tunneling conductance density of states of Tl
2
Ba
2
CuO
6
,Phys.Rev.B57, R3245–R3248(1998)
257. Y.T. Wang and A.M. Hermann,Pairing symmetry of Tl-2201 from measurements of temperature and magnetic field
dependencies of the anisotropic penetration depth,Physica C 335, 134–138 (2000)
258. C.Niedermayer, C. Bernhard,U. Binninger, H. Gl¨uckler,J.L.Tallon,E.J.Ansaldo,andJ.I.Budnick,Muonspinrotation
study of the correlation between Tc and ns/m∗ in overdoped Tl
2
Ba
2
CuO
6+ı
, Phys. Rev. Lett. 71, 1764 (1993)
259. M. Kang, G. Blumberg, M.V. Klein, and N.N. Kolesnikov, Resonance Raman study of the superconducting gap and
low energy excitations in Tl
2
Ba
2
CuO
6+ı
superconductors,Phys. Rev. Lett. 77, 4434–4437 (1996)
260. M. Li, C.J. van der Beek, M. Konczykowski, A.A. Menovsky, and P.H. Kes, Superconducting properties of strongle
underdoped Bi
2
Sr
2
CaCu
2
O
8+x
single crystals, Phys.Rev. B 66, 024502 (2002)
261. N. Miyakawa,P.Guptasarma, J.F. Zasadzinski, D.G. Hinks,and K.E. Gray, Strong dependence of the superconducting
gap on oxygen doping from tunneling measurements on Bi
2
Sr
2
CaCu
2
O
8−ı
, Phys. Rev. Lett. 80, 157–160 (1998)
262. N. Momono,R. Dipasupil, H. Ishiguro, S. Saigo, T. Nakano, M. Oda, and M. Ido, Crossover behavior of in-plane and
out-of-plane resistivity in La
2−x
Sr
x
CuO
4
,PhysicaC317-318, 603–606 (1999)
263. M. Niderost, R. Frassanito, M. Saalfrank, A.C. Mota, G. Blatter, V.N. Zavaritsky, T.W. Li, and P.H. Kes, Lower critical
field H
c1
and barriers for vortex entry in Bi
2
Sr
2
CaCu
2
O
8+ı
crystals,Phys.Rev. Lett. 81, 3231 (1998)
264. S.L. Lee, P. Zimmermann, H. Keller, M. Warden, I.M. Savic, R. Schauwecker, D. Zech, R. Cubitt, E.M. Forgan, P.H.
Kes, T.W. Li, A.A. Menovsky, and Z. Tarnawski, Evidence for flux-lattice melting and a dimensional crossover in
single-crystal Bi
2.15
Sr
1.85
CaCu
2
O
8+ı
from muon spin rotation studies,Phys. Rev. Lett. 71, 3862–3865 (1993)
265. M.Weber, P. Birrer, F.N. Gygax, B. Hitti, E. Lippelt,H. Maletta, andA. Schenck,Measurements of the London penetra-
tion depth in Bi-based high-T
c
compounds, Hyp. Int. 63, 93 (1993)
266. A. Sugimoto, S. Kahiwaya, H. Eisaki, H.Yamaguchi, K. Oka, H. Kahiwaya, H. Tsuchiura, and Y. Tanaka, Correlation
between modulation structure and electronicinhomogeneity on Pb-doped Bi-2212 single crystals,Physica C 426-431,
390–395 (2005)
267. G. Villard, D. Pelloquin, and A. Maignan, Doping dependence of the in-plane penetration depth and fishtail in
Bi
2
Sr
2
Ca
1−x
Y
x
Cu
2
O
8+ı
,Phys.Rev.B58, 15231–15237 (1998)
268. C.Bernhard, J.L. Tallon,T. Blasius,A. Golnik, and C. Neidermayer,Anomalous peak in the superconducting conden-
sate density of cuprate high-Tc superconductors at a unique doping state, Phys. Rev. Lett. 86, 1614–1617 (2001)
269. C.Panagopoulos,J.R.Cooper,andT.Xiang,Systematic behaviorof thein-plane penetration depthin d-wave cuprates,
Phys.Rev.B57, 13422–13425 (1998)
270. J.E. Sonier, J.H. Brewer, R.F. Kiefl, G.D. Morris, R.I. Miller, D.A. Bonn, J. Chakhalian, R.H. Heffner, W.N. Hardy, and
R. Liang, Field induced reduction of the low-temperature superfluid density in YBa
2
Cu
3
O
6.95
, Phys. Rev. Lett. 83,
4156–4159 (1999)
271. T.Pereg-Barnea,P.J.Turner, R.Harris,G.K.Mullins,J.S.Bobowski,M.Raudsepp,R.Liang,D.A.Bonn,andW.N.Hardy,
Absolute values of the London penetration depth in YBa
2
Cu
3
O
6+y
measured by zero field ESR spectroscopy on Gd
doped single crystals, Phys. Rev. B 69, 184513 (2004)