S.N. Lea

2.0k total citations · 1 hit paper
52 papers, 1.5k citations indexed

About

S.N. Lea is a scholar working on Atomic and Molecular Physics, and Optics, Spectroscopy and Electrical and Electronic Engineering. According to data from OpenAlex, S.N. Lea has authored 52 papers receiving a total of 1.5k indexed citations (citations by other indexed papers that have themselves been cited), including 50 papers in Atomic and Molecular Physics, and Optics, 17 papers in Spectroscopy and 15 papers in Electrical and Electronic Engineering. Recurrent topics in S.N. Lea's work include Advanced Frequency and Time Standards (34 papers), Advanced Fiber Laser Technologies (28 papers) and Atomic and Subatomic Physics Research (15 papers). S.N. Lea is often cited by papers focused on Advanced Frequency and Time Standards (34 papers), Advanced Fiber Laser Technologies (28 papers) and Atomic and Subatomic Physics Research (15 papers). S.N. Lea collaborates with scholars based in United Kingdom, United States and France. S.N. Lea's co-authors include H. S. Margolis, P. Gill, K. Szymaniec, A. Clairon, G. P. Barwood, Guozheng Huang, G. Santarelli, H. A. Klein, S. A. King and R. M. Godun and has published in prestigious journals such as Science, Physical Review Letters and Journal of Applied Physics.

In The Last Decade

S.N. Lea

50 papers receiving 1.4k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Frequency Ratio of Two Optical Clock Transitions inYb+171and Constraints on the Time Variation of Fundamental Constants

2014 316 citations R. M. Godun, Peter B. R. Nisbet-Jones et al. Physical Review Letters profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
S.N. Lea United Kingdom	18	1.4k	277	256	198	52	52	1.5k
Kurt Gibble United States	25	2.0k 1.4×	107 0.4×	325 1.3×	143 0.7×	76 1.5×	85	2.0k
A. Godone Italy	19	1.2k 0.8×	227 0.8×	150 0.6×	113 0.6×	22 0.4×	111	1.3k
Seth M. Foreman United States	17	1.9k 1.4×	514 1.9×	121 0.5×	202 1.0×	61 1.2×	26	2.0k
Martin M. Boyd United States	20	2.4k 1.7×	223 0.8×	155 0.6×	194 1.0×	95 1.8×	38	2.5k
N. Hinkley United States	10	1.6k 1.1×	184 0.7×	144 0.6×	83 0.4×	87 1.7×	13	1.6k
Rodolphe Le Targat France	16	1.4k 1.0×	203 0.7×	91 0.4×	87 0.4×	44 0.8×	47	1.5k
Katharina Predehl Germany	11	1.2k 0.8×	337 1.2×	108 0.4×	149 0.8×	20 0.4×	20	1.3k
S. A. King United Kingdom	15	782 0.6×	117 0.4×	140 0.5×	73 0.4×	39 0.8×	25	896
Travis Nicholson United States	11	1.9k 1.4×	161 0.6×	118 0.5×	122 0.6×	66 1.3×	17	2.0k
E. A. Curtis United States	16	1.2k 0.9×	465 1.7×	95 0.4×	219 1.1×	19 0.4×	34	1.3k

Countries citing papers authored by S.N. Lea

Since Specialization

Citations

This map shows the geographic impact of S.N. Lea's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by S.N. Lea with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites S.N. Lea more than expected).

Fields of papers citing papers by S.N. Lea

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by S.N. Lea. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by S.N. Lea. The network helps show where S.N. Lea may publish in the future.

Co-authorship network of co-authors of S.N. Lea

This figure shows the co-authorship network connecting the top 25 collaborators of S.N. Lea. A scholar is included among the top collaborators of S.N. Lea based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with S.N. Lea. S.N. Lea is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

1.

Barwood, G. P., P. Gill, H. A. Klein, et al.. (2017). Trapped strontium ion optical clock. 145–145.

2.

Godun, R. M., Peter B. R. Nisbet-Jones, Jonathan Jones, et al.. (2014). Frequency Ratio of Two Optical Clock Transitions inYb+171and Constraints on the Time Variation of Fundamental Constants. Physical Review Letters. 113(21). 210801–210801. 316 indexed citations breakdown →

3.

Marra, Giuseppe, Radan Slavı́k, H. S. Margolis, et al.. (2011). High-resolution microwave frequency transfer over an 86-km-long optical fiber network using a mode-locked laser. Optics Letters. 36(4). 511–511. 82 indexed citations

4.

Marra, Giuseppe, H. S. Margolis, S.N. Lea, & P. Gill. (2010). High-stability microwave frequency transfer by propagation of an optical frequency comb over 50 km of optical fiber. Optics Letters. 35(7). 1025–1025. 53 indexed citations

5.

Webster, S. A., R. M. Godun, S. A. King, et al.. (2010). Frequency measurement of the ²S_1/2_{_2}D_3/2 electric quadrupole transition in a single ₁₇₁yb+ ion. IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control. 57(3). 592–599. 14 indexed citations

6.

Lea, S.N.. (2007). Limits to time variation of fundamental constants from comparisons of atomic frequency standards. Reports on Progress in Physics. 70(9). 1473–1523. 51 indexed citations

7.

Lea, S.N., S. A. Webster, & G. P. Barwood. (2006). Polarisabilities and blackbody shifts in Sr + and Yb +. 302–307. 3 indexed citations

8.

Margolis, H. S., G. P. Barwood, K. Hosaka, et al.. (2006). Trapped Ion Optical Clocks at NPL. AIP conference proceedings. 869. 92–99. 4 indexed citations

9.

Szymaniec, K., et al.. (2005). Evaluation of the primary frequency standard NPL-CsF1. Metrologia. 42(1). 49–57. 59 indexed citations

10.

Edwards, Christopher S., H. S. Margolis, G. P. Barwood, et al.. (2004). Absolute frequency measurement of a 15-µm acetylene standard by use of a combined frequency chain and femtosecond comb. Optics Letters. 29(6). 566–566. 24 indexed citations

11.

Hosaka, Kazumoto, S. A. Webster, Peter Blythe, et al.. (2004). Optical Frequency Standard Based on an Electric Octupole Transition in 171Yb+. 289–290. 1 indexed citations

12.

Acef, O., A. Clairon, Daniele Rovera, et al.. (2003). Absolute frequency measurements with a set of transportable methane optical frequency standards. 2. 742–745. 1 indexed citations

13.

Gill, P., G. P. Barwood, H. A. Klein, et al.. (2003). Trapped ion optical frequency standards. Measurement Science and Technology. 14(8). 1174–1186. 34 indexed citations

14.

Henderson, D., et al.. (2003). Development of a caesium fountain primary frequency standard at the NPL. 1. 24–26. 1 indexed citations

15.

Szymaniec, K., et al.. (2002). Ultracold Atoms for Ultrastable Frequency Standards. Acta Physica Polonica B. 33(8). 2173. 1 indexed citations

16.

Santarelli, G., Philippe Laurent, S.N. Lea, et al.. (2002). Recent results of the LPTF cesium fountain primary frequency standard. 60–65. 2 indexed citations

17.

Lea, S.N., et al.. (1999). Progress toward an optical frequency chain at NPL. IEEE Transactions on Instrumentation and Measurement. 48(2). 578–582. 1 indexed citations

18.

Laurent, Ph., et al.. (1996). An experimental study of the spin-exchange frequency shift in a laser-cooled cesium fountain frequency standard. Europhysics Letters (EPL). 36(1). 25–30. 71 indexed citations

19.

Clairon, A., et al.. (1995). A cesium fountain frequency standard: preliminary results. IEEE Transactions on Instrumentation and Measurement. 44(2). 128–131. 128 indexed citations

20.

Santarelli, G., A. Clairon, S.N. Lea, & G. M. Tino. (1994). Heterodyne optical phase-locking of extended-cavity semiconductor lasers at 9 GHz. Optics Communications. 104(4-6). 339–344. 91 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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